2026-05-31T16:45:27Zhttp://bib-pubdb1.desy.de/oai2d
oai:bib-pubdb1.desy.de:963952025-07-18T11:57:20Zec_fundedresourcesVDBopenaireengVan der Snickt, G.Janssens, K.Dik, J.De Nolf, W.Vanmeert, F.Jaroszewicz, J.Cotte, M.Falkenberg, G.Van der Loeff, L.Combined use of synchrotron radiation-based $\mu$ -XRF, $\mu$ -XRD, $\mu$ -XANES and $\mu$ -FTIR reveals an alternative degradation pathway of the pigment cadmium yellow (CdS) in a painting by Van Goghinfo:eu-repo/classification/ddc/540Over the past years a number of studies have described the instability of the pigment cadmium yellow (CdS). In a previous paper we have shown how cadmium sulfide on paintings by James Ensor oxidizes to CdSO(4)·H(2)O. The degradation process gives rise to the fading of the bright yellow color and the formation of disfiguring white crystals that are present on the paint surface in approximately 50 μm sized globular agglomerations. Here, we study cadmium yellow in the painting "Flowers in a blue vase" by Vincent van Gogh. This painting differs from the Ensor case in the fact that (a) a varnish was superimposed onto the degraded paint surface and (b) the CdS paint area is entirely covered with an opaque crust. The latter obscures the yellow color completely and thus presents a seemingly more advanced state of degradation. Analysis of a cross-sectioned and a crushed sample by combining scanning microscopic X-ray diffraction (μ-XRD), microscopic X-ray absorption near-edge spectroscopy (μ-XANES), microscopic X-ray fluorescence (μ-XRF) based chemical state mapping and scanning microscopic Fourier transform infrared (μ-FT-IR) spectrometry allowed unravelling the complex alteration pathway. Although no crystalline CdSO(4) compounds were identified on the Van Gogh paint samples, we conclude that the observed degradation was initially caused by oxidation of the original CdS pigment, similar as for the previous Ensor case. However, due to the presence of an overlying varnish containing lead-based driers and oxalate ions, secondary reactions took place. In particular, it appears that upon the photoinduced oxidation of its sulfidic counterion, the Cd(2+) ions reprecipitated at the paint/varnish interface after having formed a complex with oxalate ions that themselves are considered to be degradation products of the resin and/or oil in the varnish. The SO(4)(2-) anions, for their part, found a suitable reaction partner in Pb(2+) ions stemming from a dissolved lead-based siccative that was added to the varnish to promote its drying. The resulting opaque anglesite compound in the varnish, in combination with the underlying CdC(2)O(4) layer at the paint/varnish interface, account for the orange-gray crust that is disfiguring the painting on a macroscopic level. In this way, the results presented in this paper demonstrate how, through a judicious combined use of several microanalytical methods with speciation capabilities, many new insights can be obtained from two minute, but highly complex and heterogeneous paint samples.Analytical chemistry 84, 10221-10228 (2012). doi:10.1021/ac3015627info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Chemical Society2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/96395https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-22103%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0003-2700info:eu-repo/semantics/altIdentifier/doi/10.1021/ac3015627info:eu-repo/semantics/altIdentifier/issn/0096-4484info:eu-repo/semantics/altIdentifier/wos/WOS:000311815300013info:eu-repo/semantics/altIdentifier/issn/1520-6882info:eu-repo/semantics/altIdentifier/pmid/pmid:22931047info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:966952025-07-30T14:25:08Zec_fundedresourcesVDBopenaireengZorenko, Y.Gorbenko, V.Voznyak, T.Savchyn, V.Nizhankovskiy, S.Danko, A.Puzikov, V.Laguta, V.Mares, J. A.Nikl, M.Nejezchleb, K.Batentschuk, M.Winnacker, A.Luminescent and scintillation properties of $Lu_3Al_5O_{12}$:Sc single crystal and single crystalline filmsinfo:eu-repo/classification/ddc/530Optical materials 34, 2080-2085 (2012). doi:10.1016/j.optmat.2012.04.018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/96695https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-21198%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.optmat.2012.04.018info:eu-repo/semantics/altIdentifier/wos/WOS:000309316400026info:eu-repo/semantics/altIdentifier/issn/1873-1252info:eu-repo/semantics/altIdentifier/issn/0925-3467info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:969982025-07-30T14:25:20Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKudryavtseva, I.Lushchik, A.Maaroos, A.Azmaganbetova, Z.Nurakhmetov, T.Salikhoja, Z.Recombination luminescence of CaS$O_{4}$:$Tb^ {3+}$ and CaS$O_{4}$:$Gd^ {3+}$ phosphorsinfo:eu-repo/classification/ddc/530Central European journal of physics 10, 995-1001 (2012). doi:10.2478/s11534-011-0091-7info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionCentral European Science Journals2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/96998https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-19788%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.2478/s11534-011-0091-7info:eu-repo/semantics/altIdentifier/issn/1644-3608info:eu-repo/semantics/altIdentifier/wos/WOS:000306484600027info:eu-repo/semantics/altIdentifier/issn/1895-1082info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:974242021-11-10T11:09:47Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZorenko, Yu.Voznyak, T.Gorbenko, V.Doroshenko, A.Tolmachev, A.Yavetskiy, R.Petrusha, I.Turkevich, V.Luminescent Properties of $Y_{3}$$Al_{5}$$O_{12}$ nano-grained ceramics and single crystalsinfo:eu-repo/classification/ddc/540Functional materials 19, 48-53 (2012).info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNational Academy of Sciences of Ukraine2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/97424https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-22161%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1027-5495info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1386152025-07-30T13:10:07Zec_fundedresourcesVDBopenaireengLushchik, A.Lushchik, Ch.Nagirnyi, V.Pazylbek, S.Sidletskiy, O.Schwartz, K.Shablonin, E.Shugai, A.Vasilchenko, E.On the mechanisms of radiation damage and prospects of their suppression in complex metal oxidesinfo:eu-repo/classification/ddc/530The influence of some impurity ions on the increase/decrease in the resistance against irradiation of metal oxides with X‐rays and electrons (low‐dense excitation) or ∼2 GeV Au$^{198}$ and U$^{238}$ ions providing a superhigh density of electronic excitations along cylindrical tracks (LET > 30 keV nm$^{−1}$) has been investigated for fcc MgO single crystals with close ion masses or Lu$_3$Al$_5$O$_{12}$ and Gd$_2$SiO$_5$ with large unit cells and heavy cations. The radiation effects have been studied using the methods of low‐temperature vacuum ultraviolet spectroscopy (up to 40 eV), cathodoluminescence and thermoactivation spectroscopy. The step‐by‐step annealing of the radiation‐induced absorption, scattering, and luminescence has been performed at the heating of irradiated crystals up to ∼70% of a melting point. Possible experimental manifestations of the temperature‐stable nanosize 3D defects created, according to theoretical predictions, via rearrangement of many host ions at the collapse of discrete solitons (breathers) are detected in Lu$_3$Al$_5$O$_{12}$ and Gd$_2$SiO$_5$ crystals irradiated with swift heavy ions (fluence of 10$^{12}$ ions cm$^{−2}$).Physica status solidi / B 250, 261-270 (2013). doi:10.1002/pssb.201200488info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/138615https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-24602%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000314929500006info:eu-repo/semantics/altIdentifier/issn/1521-3951info:eu-repo/semantics/altIdentifier/doi/10.1002/pssb.201200488info:eu-repo/semantics/altIdentifier/issn/0370-1972info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1387202025-07-30T14:25:45Zec_fundedresourcesVDBopenaireengZorenko, Yu.Voznyak, T.Gorbenko, V. V.Doroshenko, A.Tolmachev, A.Yavetskiy, R.Petrusha, I.Turkevich, V.Comparative study of the luminescence of $Y_3Al_5O_{12}$ nanoceramics and single crystals under excitation by synchrotron radiationinfo:eu-repo/classification/ddc/530Optical materials 35(12), 2049–2052 (2012). doi:10.1016/j.optmat.2012.07.009info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/138720https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23189%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.optmat.2012.07.009info:eu-repo/semantics/altIdentifier/issn/1873-1252info:eu-repo/semantics/altIdentifier/issn/0925-3467info:eu-repo/semantics/altIdentifier/wos/WOS:000326660500001info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1387262025-07-30T14:25:45Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZorenko, Yu.Gorbenko, V.Savchyn, V.Voznyak, T.Sidletskiy, O.Grinyov, B.Nikl, M.Mares, J. A.Martin, T.Douissard, P. -A.Single crystalline film scintillators based on the orthosilicate, perovskite and garnet compoundsinfo:eu-repo/classification/ddc/620IEEE transactions on nuclear science 59, 2260-2268 (2012). doi:10.1109/TNS.2012.2188907info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIEEE2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/138726https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23192%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1558-1578info:eu-repo/semantics/altIdentifier/wos/WOS:000310143300044info:eu-repo/semantics/altIdentifier/doi/10.1109/TNS.2012.2188907info:eu-repo/semantics/altIdentifier/issn/0018-9499info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1388542025-07-30T14:25:48Zec_fundedresourcesVDBopenaireengZorenko, Yu.Zorenko, T.Voznyak, T.Nizhankovskiy, S.Krivonosov, E.Danko, A.Puzikov, V.Comparative study of the luminescence of $Al_2O_3$:Ti and $Al_2O_3$ crystals under VUV synchrotron radiation excitationinfo:eu-repo/classification/ddc/530Optical materials 35(12), 2053-2055 (2012). doi:10.1016/j.optmat.2012.10.044info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/138854https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23186%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000326660500002info:eu-repo/semantics/altIdentifier/issn/1873-1252info:eu-repo/semantics/altIdentifier/issn/0925-3467info:eu-repo/semantics/altIdentifier/doi/10.1016/j.optmat.2012.10.044info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1388842017-02-10T21:56:33Zec_fundedresourcesVDBopenaireengStark, A.Schwaighofer, E.Mayer, S.Lippmann, T.Lottermoser, L.Schreyer, A.Clemens, H.Pyczak, F.In situ high energy XRD study of the hot-deformation behaviour of a novel gamma-TiAl alloyinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionMRS Fall Meeting 2012, Boston, -, USA, 2012-11-25 - 2012-11-302012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/138884https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-24066%22Researchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1390662025-07-30T13:10:03Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKuzmin, A.Kalinko, A.Evarestov, R. A.Ab initio LCAO study of the atomic, electronic and magnetic structures and the lattice dynamics of triclinic $CuWO_4$info:eu-repo/classification/ddc/670Acta materialia 61, 371-378 (2013). doi:10.1016/j.actamat.2012.10.002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/139066https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23556%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2012.10.002info:eu-repo/semantics/altIdentifier/wos/WOS:000313604400034info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1392432017-02-10T21:56:55Zec_fundedresourcesVDBopenaireengPawlak, A.Galeski, A.Ohl, C.D.Klaseboer, E.Ohl, S.W.Gong, S.W.Khoo, B.C.Cavitation during deformation of plastics.Proceedings of the Eight International Symposium on Cavitation 1, 816-821 (2012).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of the Eight International Symposium on CavitationProceedings of the Eight International Symposium on Cavitation<br/>8th International Symposium on Cavitation, CAV 2012, Singapore, Singapore, 2012-08-13 - 2012-08-16Research Publishing Services2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/139243https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-24155%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-981-07-2826-7info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1394512025-07-18T11:57:22Zec_fundedresourcesVDBopenaireengMonico, L.Janssens, K.Verbeeck, J.Radepont, M.Cotte, M.Hendriks, E.Geldof, M.van der Loeff, L.Salvant, J.Menu, M.Miliani, C.Brunetti, B. G.Vagnini, M.Vanmeert, F.Falkenberg, G.Abakumov, A.Lu, Y.Tian, H.Degradation Process of Lead Chromate in Paintings by Vincent van Gogh Studied by Means of Spectromicroscopic Methods. 3. Synthesis, Characterization, and Detection of Different Crystal Forms of the Chrome Yellow Pigmentinfo:eu-repo/classification/ddc/540The painter, Vincent van Gogh, and some of his contemporaries frequently made use of the pigment chrome yellow that is known to show a tendency toward darkening. This pigment may correspond to various chemical compounds such as PbCrO(4) and PbCr(1-x)S(x)O(4), that may each be present in various crystallographic forms with different tendencies toward degradation. Investigations by X-ray diffraction (XRD), mid-Fourier Transform infrared (FTIR), and Raman instruments (benchtop and portable) and synchrotron radiation-based micro-XRD and X-ray absorption near edge structure spectroscopy performed on oil-paint models, prepared with in-house synthesized PbCrO(4) and PbCr(1-x)S(x)O(4), permitted us to characterize the spectroscopic features of the various forms. On the basis of these results, an extended study has been carried out on historic paint tubes and on embedded paint microsamples taken from yellow-orange/pale yellow areas of 12 Van Gogh paintings, demonstrating that Van Gogh effectively made use of different chrome yellow types. This conclusion was also confirmed by in situ mid-FTIR investigations on Van Gogh's Portrait of Gauguin (Van Gogh Museum, Amsterdam).Analytical chemistry 85, 851-859 (2013). doi:10.1021/ac302158binfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Chemical Society2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/139451https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23926%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0003-2700info:eu-repo/semantics/altIdentifier/doi/10.1021/ac302158binfo:eu-repo/semantics/altIdentifier/issn/1520-6882info:eu-repo/semantics/altIdentifier/issn/0096-4484info:eu-repo/semantics/altIdentifier/pmid/pmid:23050489info:eu-repo/semantics/altIdentifier/wos/WOS:000313668400031info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1397122025-07-30T14:26:05Zec_fundedresourcesVDBopenaireengSchneider, C. M.Wiemann, C.Patt, M.Feyer, V.Plucinski, L.Krug, I. P.Escher, M.Weber, N.Merkel, M.Renault, O.Barrett, N.Expanding the view into complex material systems: From micro-ARPES to nanoscale HAXPESinfo:eu-repo/classification/ddc/620Journal of electron spectroscopy and related phenomena 185, 330-339 (2012). doi:10.1016/j.elspec.2012.08.003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/139712https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23091%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0368-2048info:eu-repo/semantics/altIdentifier/doi/10.1016/j.elspec.2012.08.003info:eu-repo/semantics/altIdentifier/issn/1873-2526info:eu-repo/semantics/altIdentifier/wos/WOS:000312979400004info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1397572025-07-30T13:10:26Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZorenko, Yu.Gorbenko, V.Nikl, M.Jari, V.$Bi^{3+}-Ce{3+}$ energy transfer and luminescent properties of LuAG:Bi,Ce and YAG:Bi,Ce single crystalline filmsinfo:eu-repo/classification/ddc/530Journal of luminescence 134, 539-543 (2013). doi:10.1016/j.jlumin.2012.07.032info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/139757https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23187%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0022-2313info:eu-repo/semantics/altIdentifier/issn/1872-7883info:eu-repo/semantics/altIdentifier/wos/WOS:000313393300087info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jlumin.2012.07.032info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1397672025-07-30T14:26:06Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGorbenko, V.Krasnikov, A.Mihokova, E.Nikl, M.Zazubovich, S.Zorenko, Yu.Luminescence of lead-related centers in single crystalline films of $Lu_2SiO_5$info:eu-repo/classification/ddc/530Journal of physics / D 45, 355304 (2012). doi:10.1088/0022-3727/45/35/355304info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/139767https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23190%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000308796800012info:eu-repo/semantics/altIdentifier/doi/10.1088/0022-3727/45/35/355304info:eu-repo/semantics/altIdentifier/issn/0262-8171info:eu-repo/semantics/altIdentifier/issn/0022-3727info:eu-repo/semantics/altIdentifier/issn/1361-6463info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1401882025-07-30T14:26:16Zec_fundedresourcesVDBopenaireengSchmoelzer, T.Stark, A.Schwaighofer, E.Lippmann, T.Mayer, S.Clemens, H.In-situ synchrotron study of B19 phase formation in an intermetallic $\gamma$-TiAl alloyinfo:eu-repo/classification/ddc/540Advanced engineering materials 14, 445-448 (2012). doi:10.1002/adem.201200047info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH Verl.2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/140188https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-23936%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1002/adem.201200047info:eu-repo/semantics/altIdentifier/wos/WOS:000305944400005info:eu-repo/semantics/altIdentifier/issn/1438-1656info:eu-repo/semantics/altIdentifier/issn/1527-2648info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1401902025-07-18T11:57:51Zdnbdeliverydriveropen_accessopenaireVDBec_fundedresourcesengHrauda, N.Zhang, J. J.Süess, M. J.Wintersberger, E.Holý, V.Stangl, J.Deiter, C.Seeck, O. H.Bauer, G.Strain distribution in Si capping layers on SiGe islands: influence of cap-thickness and footprint in reciprocal spaceinfo:eu-repo/classification/ddc/530We present investigations on the strain properties of silicon capping layers on top of regular SiGe island arrays, in dependence on the Si-layer thickness. Such island arrays are used as stressors for the active channel in field-effect transistors where the desired tensile strain in the Si channel is a crucial parameter for the performance of the device. The thickness of the Si cap was varied from 0 to 30 nm. The results of high resolution x-ray diffraction experiments served as input to perform detailed strain calculations via finite element method models. Thus, detailed information on the Ge distribution within the buried islands and the strain interaction between the SiGe island and Si cap was obtained. It was found that the tensile strain within the Si capping layer strongly depends on its thickness, even if the Ge concentration of the buried dot remains unchanged, with tensile strains degrading if thicker Si layers are used.Nanotechnology 23, 465705 (2012). doi:10.1088/0957-4484/23/46/465705info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/140190https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-24460%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0957-4484/23/46/465705info:eu-repo/semantics/altIdentifier/issn/0957-4484info:eu-repo/semantics/altIdentifier/issn/1361-6528info:eu-repo/semantics/altIdentifier/pmid/pmid:23092941info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1409432021-11-10T11:15:37Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBraz Fernandes, F. M.Mahesh, K. K.Craciunescu, C. M.Oliveira, J. P.Schell, N.Miranda, R. M.Quintino, L.Ocana, J. L.Silva Gomes, J.F.Vaz, M.A.P.Structural characterization by X-ray diffraction of laser welded shape memory alloysProceedings ICEM15 - 15th International Conference on Experimental Mechanics, FEUP, Porto, 22-27 July 2012 1, 1-7 (2012).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings ICEM15 - 15th International Conference on Experimental Mechanics, FEUP, Porto, 22-27 July 2012Proceedings ICEM15 - 15th International Conference on Experimental Mechanics, FEUP, Porto, 22-27 July 2012<br/>15th International Conference on Experimental Mechanics, ICEM15, Porto, POrtugal, 2012-07-22 - 2012-07-27INEGI2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/140943https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25269%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-972-8826-26-0info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1410202021-11-10T11:15:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBraz Fernandes, F. M.Mahesh, K. K.Neves, F.Stark, A.Schell, N.Silva Gomes, J.F.Vaz, M.A.P.In situ study of thermomechanical cycling of shape memory alloysProceedings ICEM15 - 15th International Conference on Experimental Mechanics, FEUP, Porto, 22-27 July 2012 1, 1-2 (2012).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings ICEM15 - 15th International Conference on Experimental Mechanics, FEUP, Porto, 22-27 July 2012Proceedings ICEM15 - 15th International Conference on Experimental Mechanics, FEUP, Porto, 22-27 July 2012<br/>15th International Conference on Experimental Mechanics, ICEM15, Porto, Portugal, 2012-07-22 - 2012-07-27INEGI2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/141020https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25271%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-972-8826-26-0info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1410252025-07-30T13:10:37Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZorenko, Yu.Zorenko, T.Voznyak, T.Sidletskiy, O.Intrinsic luminescence of $Lu_2SiO_5$ (LSO) and $Y_2SiO_5$ (YSO) orthosilicatesinfo:eu-repo/classification/ddc/530Journal of luminescence 137, 204-207 (2013). doi:10.1016/j.jlumin.2013.01.012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-01-19DEhttps://bib-pubdb1.desy.de/record/141025https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25059%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0022-2313info:eu-repo/semantics/altIdentifier/wos/WOS:000316832600036info:eu-repo/semantics/altIdentifier/issn/1872-7883info:eu-repo/semantics/altIdentifier/doi/10.3204/PHPPUBDB-25059info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jlumin.2013.01.012info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1410492018-04-24T20:01:09Zec_fundedresourcesVDBopenaireengOliveira, J. P.Braz Fernandes, F. M.Miranda, R. M.Laser Welded NiTi - Correlation between Mechanical Cycling Behavior and MicrostructureSaarbrucken : LAP Lambert Academic Publishing - (2013).info:eu-repo/semantics/bookinfo:eu-repo/semantics/publishedVersionLAP Lambert Academic Publishing2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/141049https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25279%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-3-659-31719-4info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1412002025-07-30T14:26:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSerrano, C.Ressia, J. A.Valles, E. M.Fernandez-Garcia, M.Cerrada, M. L.Interfacial agent effect on rheological response and crystallite characteristics in germicidal polypropylene/titanium dioxide nanocompositesinfo:eu-repo/classification/ddc/660Polymer international 61, 1655-1665 (2012). doi:10.1002/pi.4256info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley2012info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/141200https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25002%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1934-256Xinfo:eu-repo/semantics/altIdentifier/doi/10.1002/pi.4256info:eu-repo/semantics/altIdentifier/wos/WOS:000310072900009info:eu-repo/semantics/altIdentifier/issn/0959-8103info:eu-repo/semantics/altIdentifier/issn/0007-1641info:eu-repo/semantics/altIdentifier/issn/1097-0126info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1425962025-07-30T14:26:43Zec_fundedresourcesVDBopenaireengAlmasi, M.Zelenak, V.Gyepes, R.Zukal, A.Cejka, J.Synthesis, characterization and sorption properties of zincII metalorganic framework containing methanetetrabenzoate ligandinfo:eu-repo/classification/ddc/540Colloids and surfaces / A 437, 101-107 (2012). doi:10.1016/j.colsurfa.2012.11.067info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2012info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/142596https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25552%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000326433000009info:eu-repo/semantics/altIdentifier/issn/0927-7757info:eu-repo/semantics/altIdentifier/doi/10.1016/j.colsurfa.2012.11.067info:eu-repo/semantics/altIdentifier/issn/1873-4359info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1441382025-07-30T13:10:51Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKirsch, I.Kalaydzhyan, T.Chiral magnetic effect and holographyinfo:eu-repo/classification/ddc/530Proceedings of Science Conf X, 262 (2013). doi:10.22323/1.171.0262info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion10th Quark Confinement and the Hadron Spectrum, Confinement X, Munich, Germany, 2012-10-08 - 2012-10-12SISSA2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/144138https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25855%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1301.6558info:eu-repo/semantics/altIdentifier/doi/10.22323/1.171.0262info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1454932025-07-30T13:11:06Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKodre, A.Padeznik Gomilsek, J.Hauko, R.Sala, M.Arcon, I.Absolute determination of the X-ray absorption coefficient of barium in the L region using a liquid absorption cellinfo:eu-repo/classification/ddc/530X-ray spectrometry 42, 63-67 (2013). doi:10.1002/xrs.2434info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/145493https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25896%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1002/xrs.2434info:eu-repo/semantics/altIdentifier/issn/1097-4539info:eu-repo/semantics/altIdentifier/issn/0049-8246info:eu-repo/semantics/altIdentifier/wos/WOS:000314971900002info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1454982025-07-30T13:10:57Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKoren, S.Arcon, I.Kump, P.Necemer, M.Vogel-Mikus, K.Influence of $CdCl_{2}$ and $CdSO_{4}$ supplementation on Cd distribution and ligand environment in leaves of the Cd hyperaccumulator Noccaea (Thlaspi) praecoxinfo:eu-repo/classification/ddc/570Plant and soil 370(1-2), 125-148 (2013). doi:10.1007/s11104-013-1617-0info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer Science + Business Media B.V2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/145498https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-25895%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1573-5036info:eu-repo/semantics/altIdentifier/doi/10.1007/s11104-013-1617-0info:eu-repo/semantics/altIdentifier/wos/WOS:000323253500010info:eu-repo/semantics/altIdentifier/issn/0032-079Xinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1473032025-07-17T12:29:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBoseggia, S.Springell, R.Walker, H. C.Ronnow, H. M.Ruegg, Ch.Okabe, H.Osobe, M.Perry, R. S.Collins, S. P.McMorrow, D. F.Robustness of basal-plane antiferromagnetic order and the $J_\mathrm{eff}=1/2$ state in single-layer iridate spin-orbit mott insulatorsinfo:eu-repo/classification/ddc/550Physical review letters 110, 117207 (2013). doi:10.1103/PhysRevLett.110.117207info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/147303https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26046%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000316173100007info:eu-repo/semantics/altIdentifier/issn/1079-7114info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.110.117207info:eu-repo/semantics/altIdentifier/pmid/pmid:25166574info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1473842021-11-10T11:16:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Blümlein, J.Moch, S.Parton Distributions and alpha_s for the LHCRed Report (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/147384https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26057%22Researchersinfo:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1483812025-07-30T13:11:42Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDragomir, M.Arcon, I.Gardonio, S.Valant, M.Phase relations and optoelectronic characteristics in the $NdVO_4-BiVO_4$ systeminfo:eu-repo/classification/ddc/670Acta materialia 61, 1126-1135 (2013). doi:10.1016/j.actamat.2012.10.020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/148381https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26379%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/wos/WOS:000315431500010info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2012.10.020info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1484152021-11-10T11:17:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNidaiev, I.Teschner, J.On the relation between the modular double of $\mathrm{U_q(sl(2,R))}$ and the quantum Teichmueller theoryRed Report (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/148415https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26410%22Researchersinfo:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1485042021-11-10T11:17:39Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengVartanov, G.Teschner, J.Supersymmetric gauge theories, quantization of moduli spaces of flat connections, and conformal field theoryRed Report (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/148504https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26451%22Researchersinfo:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1485482021-11-10T11:17:44Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Blümlein, J.Moch, S.-O.ABM11 PDFs and the cross section benchmarks in NNLOarXiv E-Print (only) (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/148548https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26487%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1302.1516info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1519542025-07-30T13:11:52Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMatam, S. K.Chiarello, G. L.Lu, Y.Weidenkaff, A.Ferri, D.PdOx/Pd at Work in a Model Three-Way Catalyst for Methane Abatement Monitored by Operando XANESinfo:eu-repo/classification/ddc/540Topics in catalysis 56, 239 (2013). doi:10.1007/s11244-013-9960-1info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionBaltzer2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/151954https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26558%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1022-5528info:eu-repo/semantics/altIdentifier/wos/WOS:000318213800043info:eu-repo/semantics/altIdentifier/doi/10.1007/s11244-013-9960-1info:eu-repo/semantics/altIdentifier/issn/1572-9028info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1519662021-11-10T11:17:55Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlioli, S.Fernandez, P.Fuster, J.Irles, A.Moch, S.-O.Uwer, P.Vos, M.A new observable to measure the top-quark mass at hadron colliders.Red Report (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/151966https://bib-pubdb1.desy.de/search?p=id:%22PHPPUBDB-26563%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1303.6415info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1523132025-07-30T13:12:08Zec_fundedresourcesVDBopenaireengHatsuda, YasuyukiMoriyama, SanefumiOkuyama, KazumiInstanton Bound States in ABJM Theoryinfo:eu-repo/classification/ddc/530arXiv The partition function of the ABJM theory receives non-perturbative corrections due to instanton effects. We study these non-perturbative corrections, including bound states of worldsheet instantons and membrane instantons, in the Fermi-gas approach. We require that the total non-perturbative correction should be always finite for arbitrary Chern-Simons level. This finiteness is realized quite non-trivially because each bound state contribution naively diverges at some levels. The poles of each contribution should be canceled out in total. We use this pole cancellation mechanism to find unknown bound state corrections from known ones. We conjecture a general expression of the bound state contribution. Summing up all the bound state contributions, we find that the effect of bound states is simply incorporated into the worldsheet instanton correction by a redefinition of the chemical potential in the Fermi-gas system. Analytic expressions of the 3- and 4-membrane instanton corrections are also proposed. Springer The partition function of the ABJM theory receives non-perturbative corrections due to instanton effects. We study these non-perturbative corrections, including bound states of worldsheet instantons and membrane instantons, in the Fermi-gas approach. We require that the total non-perturbative correction should be always finite for arbitrary Chern-Simons level. This finiteness is realized quite non-trivially because each bound state contribution naively diverges at some levels. The poles of each contribution should be canceled out in total. We use this pole cancellation mechanism to find unknown bound state corrections from known ones. We conjecture a general expression of the bound state contribution. Summing up all the bound state contributions, we find that the effect of bound states is simply incorporated into the worldsheet instanton correction by a redefinition of the chemical potential in the Fermi-gas system. Analytic expressions of the 3- and 4-membrane instanton corrections are also proposed.Journal of high energy physics 1305(5), 54 (2013). doi:10.1007/JHEP05(2013)054info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersionSpringer2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/152313https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00171%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP05(2013)054info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1523342025-07-30T13:12:22Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAirapetian, A.Aschenauer, E. C.Ciullo, G.Clarkson, A.Contalbrigo, M.De Leo, R.De Sanctis, E.Diefenthaler, M.Di Nezza, P.Düren, M.Ehrenfried, M.Guler, H.Belostotski, S.Gregor, I. M.Hartig, M.Hill, G.Hoek, M.Holler, Y.Hristova, I.Jo, H. S.Kaiser, R.Keri, T.Kisselev, A.Borisenko, A.Krause, B.Krauss, B.Lagamba, L.Lehmann, I.Lenisa, P.Lu, S.Lu, X.-G.Lumsden, S.Mahon, D.Martinez de la Ossa, AlbertoBowles, J.Murray, M.Mussgiller, A.Nowak, W. -D.Naryshkin, Y.Osborne, A.Pappalardo, L. L.Perez-Benito, R.Petrov, A.Pickert, N.Prahl, V.Brodski, I.Protopopescu, D.Reinecke, M.Riedl, CarolineRith, K.Rosner, G.Rubacek, L.Ryckbosch, D.Salomatin, Y.Schnell, GunarSeitz, B.Bryzgalov, V.Shearer, C.Shutov, VitalyStatera, M.Steijger, J. J. M.Stenzel, H.Stewart, J.Stinzing, F.Trzcinski, A.Tytgat, M.Vandenbroucke, A.Burns, J.Van Haarlem, Y.Van Hulse, C.Varanda, M.Veretennikov, D.Vilardi, I.Vikhrov, V.Vogel, C.Yaschenko, S.Ye, ZhenyuYu, W.Capitani, G. P.Zeiler, D.Zihlmann, B.Carassiti, V.The HERMES Recoil Detectorinfo:eu-repo/classification/ddc/610For the final running period of HERA, a recoil detector was installed at the HERMES experiment to improve measurements of hard exclusive processes in charged-lepton nucleon scattering. Here, deeply virtual Compton scattering is of particular interest as this process provides constraints on generalised parton distributions that give access to the total angular momenta of quarks within the nucleon. The HERMES recoil detector was designed to improve the selection of exclusive events by a direct measurement of the four-momentum of the recoiling particle. It consisted of three components: two layers of double-sided silicon strip sensors inside the HERA beam vacuum, a two-barrel scintillating fibre tracker, and a photon detector. All sub-detectors were located inside a solenoidal magnetic field with an integrated field strength of 1 T. The recoil detector was installed in late 2005. After the commissioning of all components was finished in September 2006, it operated stably until the end of data taking at HERA end of June 2007. The present paper gives a brief overview of the physics processes of interest and the general detector design. The recoil detector components, their calibration, the momentum reconstruction of charged particles, and the event selection are described in detail. The paper closes with a summary of the performance of the detection system.Journal of Instrumentation 8(05), 49 (2013). doi:10.1088/1748-0221/8/05/P05012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst. of Physics2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/152334https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00184%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000320726000022info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1302.6092info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/8/05/P05012info:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00184info:eu-repo/grantAgreement/EC//227431
oai:bib-pubdb1.desy.de:1523432025-07-30T13:12:16Zec_fundedresourcesVDBopenaireengPopov, A. I.Shirmane, L.Pankratov, V.Lushchik, A.Kotlov, A.Serga, V. E.Kulikova, L. D.Chikvaidze, G.Zimmermann, J.Comparative study of the luminescence properties of macro- and nanocrystalline MgO using synchrotron radiationinfo:eu-repo/classification/ddc/530Nuclear instruments & methods in physics research / B 310, 23 - 26 (2013). doi:10.1016/j.nimb.2013.05.017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/152343https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00185%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0168-583xinfo:eu-repo/semantics/altIdentifier/wos/WOS:000323299100005info:eu-repo/semantics/altIdentifier/issn/0168-583Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nimb.2013.05.017info:eu-repo/semantics/altIdentifier/issn/1872-9584info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1527602021-11-10T11:19:23Zec_fundedresourcesdriverVDBopen_accessopenaireengMichalik, StefanIn-situ XRD study of structural transformations in ion bombarded metallic alloysinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionWinter School of Synchrotron Radiation 2013, WSSR 2013, Liptovsky Jan, Slovak Republic, 2013-03-11 - 2013-03-152013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/152760https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00287%22Researchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1527612021-11-10T11:19:24Zec_fundedresourcesdriverVDBopen_accessopenaireengMichalik, StefanIdentification of the Curie point in FINEMET based alloys using in-situ X-ray diffractionThe thermal expansion behaviour of Fe(73.5-x)MnxSi13.5Cu1Nb3B9 (x = 1, 3, 5, 7 and 9) amorphous ribbon samples below the crystallization temperature was investigated on the atomic scale using in-situ high-energy X-ray diffraction (HEXRD). The tracing the position of the first diffuse diffraction maximum was used to follow the thermal expansion behavior of the studied samples. It was observed that the thermal volume coefficient is able to reflect the ferromagnetic transition. The temperatures at which the expansion curves changes their slopes are in good accordance with Curie temperatures extracted from thermomagnetic measurements. In order to get more information about structural changes, the atomic pair distribution function were calculated. Our results suggest that in-situ HEXRD provide enough sensitivity to detect the transition from the ferromagnetic to the paramagnetic state in the case of FINEMET based alloys.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion15th Czech and Slovak Conference on Magnetism, CSMAG'13, Košice, Slovakia, 2013-06-17 - 2013-06-212013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/152761https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00288%22Researchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1527652021-11-10T11:19:24Zec_fundedresourcesdriverVDBopen_accessopenaireengMichalik, StefanBednarcik, JozefPawlik, P.Matija, RudolfSovak, PavolThe structural stability of soft magnetic Fe-Co-Zr-W-B metallic glasses investigated by the in-situ XRDinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion15th Czech and Slovak Conference on Magnetism, CSMAG'13, Košice, Slovakia, 2013-06-17 - 2013-07-212013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/152765https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00292%22Researchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1535852025-07-18T11:57:57Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZhang, PeiBaboi, Nicoleta-IonelaJones, Roger M.Statistical Methods for Transverse Beam Position Diagnostics with Higher Order Modes in Third Harmonic 3.9GHz Superconducting Accelerating Cavities at FLASHinfo:eu-repo/classification/ddc/530Beam-excited higher order modes (HOM) can be used to provide beam diagnostics. Here we focus on 3.9 GHz superconducting accelerating cavities. In particular we study dipole mode excitation and its application to beam position determinations. In order to extract beam position information, linear regression can be used. Due to a large number of sampling points in the waveforms, statistical methods are used to effectively reduce the dimension of the system, such as singular value decomposition (SVD) and k-means clustering. These are compared with the direct linear regression (DLR) on the entire waveforms. A cross-validation technique is used to study the sample independent precisions of the position predictions given by these three methods. A RMS prediction error in the beam position of approximately 50 micron can be achieved by DLR and SVD, while k-means clustering suggests 70 micron.Nuclear instruments & methods in physics research / A 734(Part A), 84–94 (2014). doi:10.1016/j.nima.2012.11.057info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/153585https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00598%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1872-9576info:eu-repo/semantics/altIdentifier/issn/0168-9002info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nima.2012.11.057info:eu-repo/semantics/altIdentifier/wos/WOS:000327492100013info:eu-repo/grantAgreement/EC//227579
oai:bib-pubdb1.desy.de:1537092021-11-10T11:23:36Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDowling, MatthewMoch, Sven-OlafDifferential distributions for top-quark hadro-production with a running massWe take a look at how the differential distributions for top-quark production are affected by changing to the running mass scheme. Specifically we consider the transverse momentum, rapidity and pair-invariant mass distributions at NLO for the top-quark mass in the MSbar scheme. It is found that, similar to the total cross section, the perturbative expansion converges faster and the scale dependence improves using the mass in the MSbar scheme as opposed to the on-shell scheme. We also update the analysis for the total cross section using the now available full NNLO contribution.Red Report 12 p. (2013).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/153709https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00675%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1305.6422info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1537432025-07-30T13:16:05Zec_fundedresourcesVDBopenaireengStark, AndreasSchwaighofer, EmanuelMayer, SveaClemens, HelmutLippmann, ThomasLottermoser, LarsSchreyer, AndreasPyczak, FlorianIn Situ High-Energy XRD Study of the Hot-Deformation Behavior of a Novel γ-TiAl Alloyinfo:eu-repo/classification/ddc/670MRS online proceedings library 1516, mrsf12-1516-jj02-04 (2013). doi:10.1557/opl.2012.1577info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionIntermetallic-Based Alloys―Science, Technology and ApplicationsIntermetallic-Based Alloys―Science, Technology and Applications<br/>MRS Fall Meeting 2012, Boston, USA, 2012-11-25 - 2012-11-30MRS2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/153743https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00691%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:00info:eu-repo/semantics/altIdentifier/doi/10.1557/opl.2012.1577info:eu-repo/semantics/altIdentifier/issn/0272-9172info:eu-repo/semantics/altIdentifier/issn/1946-4274info:eu-repo/semantics/altIdentifier/isbn/9781605114934info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1538192025-07-30T13:16:28Zec_fundedresourcesVDBopenaireengElsen, AnnikaFestersen, SvenRunge, BenjaminKoops, ChristianOcko, BenjaminDeutsch, MosheSeeck, OliverMurphy, BridgetMagnussen, OlafIn situ x-ray studies of adlayer-induced crystal nucleation at the liquid-liquid interfaceinfo:eu-repo/classification/ddc/000Crystal nucleation and growth at a liquid–liquid interface is studiedon the atomic scale by in situ Å-resolution X-ray scatteringmethods for the case of liquid Hg and an electrochemical diluteelectrolyte containing Pb2+, F−, and Br− ions. In the regime negativeof the Pb amalgamation potential Φrp = −0:70 V, no change isobserved from the surface-layered structure of pure Hg. Uponpotential-induced release of Pb2+ from the Hg bulk at Φ>Φrp,the formation of an intriguing interface structure is observed,comprising a well-defined 7.6-Å–thick adlayer, decorated withstructurally related 3D crystallites. Both are identified by their diffractionpeaks as PbFBr, preferentially aligned with their ~c axisalong the interface normal. X-ray reflectivity shows the adlayerto consist of a stack of five ionic layers, forming a single-unit-cell–thick crystalline PbFBr precursor film, which acts as a template forthe subsequent quasiepitaxial 3D crystal growth. This growth behavioris assigned to the combined action of electrostatic and shortrangechemical interactions.Proceedings of the National Academy of Sciences of the United States of America 110(17), 6663-6668 (2013). doi:10.1073/pnas.1301800110info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAcademy2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/153819https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00727%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:23553838info:eu-repo/semantics/altIdentifier/wos/WOS:000318677300026info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1301800110info:eu-repo/semantics/altIdentifier/issn/1091-6490info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1538612025-07-17T12:29:12Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRothkirch, AndréGatta, G. DiegoMeyer, MathiasMerkel, SébastienMerlini, MarcoLiermann, Hanns-PeterSingle-crystal diffraction at the Extreme Conditions beamline P02.2: procedure for collecting and analyzing high-pressure single-crystal datainfo:eu-repo/classification/ddc/540Journal of synchrotron radiation 20(5), 711 - 720 (2013). doi:10.1107/S0909049513018621info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIUCr2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/153861https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00741%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1600-5775info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00741info:eu-repo/semantics/altIdentifier/wos/WOS:000323282800006info:eu-repo/semantics/altIdentifier/doi/10.1107/S0909049513018621info:eu-repo/semantics/altIdentifier/issn/0909-0495info:eu-repo/semantics/altIdentifier/pmid/pmid:23955034info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1542542025-07-17T12:30:17Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHrauda, NinaZhang, JianJunGroiss, HeikoEtzelstorfer, TanjaHoly, VaclavBauer, GuentherDeiter, CarstenSeeck, OliverStangl, JulianStrain relief and shape oscillations in site-controlled coherent SiGe islandsinfo:eu-repo/classification/ddc/530Strain engineering and the crystalline quality of semiconductor nanostructures are important issues for electronic and optoelectronic devices. We report on defect-free SiGe island arrays resulting from Ge coverages of up to 38 monolayers grown on prepatterned Si(001) substrates. This represents a significant expansion of the parameter space known for the growth of perfect island arrays. A cyclic development of the Ge content and island shape was observed while increasing the Ge coverage. Synchrotron-based x-ray diffraction experiments and finite element method calculations allow us to study the strain behavior of such islands in great detail. In contrast to the oscillatory changes of island shape and average Ge content, the overall strain behavior of these islands exhibits a clear monotonic trend of progressive strain relaxation with increasing Ge coverage.Nanotechnology 24(33), 35707--35707 (2013). doi:10.1088/0957-4484/24/33/335707info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154254https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00866%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0957-4484/24/33/335707info:eu-repo/semantics/altIdentifier/wos/WOS:000322377600019info:eu-repo/semantics/altIdentifier/issn/1361-6528info:eu-repo/semantics/altIdentifier/pmid/pmid:23892543info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1542742025-07-30T13:16:49Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSingh, S. P.Vogel-Mikus, K.Arcon, I.Vavpetic, P.Jeromel, L.Pelicon, P.Kumar, J.Tuli, R.Pattern of iron distribution in maternal and filial tissues in wheat grains with contrasting levels of ironinfo:eu-repo/classification/ddc/580Iron insufficiency is a worldwide problem in human diets. In cereals like wheat, the bran layer of the grains is an important source of iron. However, the dietary availability of iron in wheat flour is limited due to the loss of the iron-rich bran during milling and processing and the presence of anti-nutrients like phytic acid that keep iron strongly chelated in the grain. The present study investigated the localization of iron and phosphorus in grain tissues of wheat genotypes with contrasting grain iron content using synchrotron-based micro-X-ray fluorescence (micro-XRF) and micro-protoninduced X-ray emission (micro-PIXE). X-ray absorption near-edge spectroscopy (XANES) was employed to determinethe proportion of divalent and trivalent forms of Fe in the grains. It revealed the abundance of oxygen, phosphorus, and sulphur in the local chemical environment of Fe in grains, as Fe-O-P-R and Fe-O-S-R coordination. Contrasting differences were noticed in tissue-specific relative localization of Fe, P, and S among the different genotypes, suggesting a possible effect of localization pattern on iron bioavailability. The current study reports the shift in iron distribution from maternal to filial tissues of grains during the evolution of wheat from its wild relatives to the present-day cultivated varieties, and thus suggests the value of detailed physical localization studies in varietal improvement programmes for food crops.The journal of experimental botany 64(11), 3249 - 3260 (2013). doi:10.1093/jxb/ert160info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionUniv. Press2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154274https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00886%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:23918965info:eu-repo/semantics/altIdentifier/issn/1460-2431info:eu-repo/semantics/altIdentifier/doi/10.1093/jxb/ert160info:eu-repo/semantics/altIdentifier/issn/0022-0957info:eu-repo/semantics/altIdentifier/wos/WOS:000322953500015info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1542752021-11-10T11:25:28Zec_fundedresourcesdriverVDBopen_accessopenaireengArcon, IztokVogel-Mikus, KatarinaKump, PeterMicro-XANES analysis of metal accumulation in plants on sub-cellular levelThere is a growing need to develop powerful analytical tools for monitoring concentrations and chemical state of trace element in the biosphere and its abiotic environment, due to pollution and degradation of ecosystems worldwide. Increased metal concentrations present in the environment pose a threat to all living organisms from microorganisms and plants to animals and humans, because they interfere with vital biological processes. The goal is to efficiently assess metal bioavailability and toxicity, and gain more knowledge on the mechanisms of metal uptake, accumulation and detoxification in living organisms [1]. In this work we demonstrate that a combination of micro-XRF imaging and micro-XANES and EXAFS analysis represents a powerful and indispensable tool for characterization of metal pollutants on subcellular level. The methodological approaches for efficient micro-XAS experiments are presented, the limitations and sources of potential systematic errors in XANES and EXAFS analysis (especially at low energies) due to self-absorption effects and strong energy dependent penetration depth of X-ray beam in the sample are discussed. Some typical examples of such combined micro-spectroscopy analysis are selected from the following research fields: Cd/Zn hyper-accumulating plants, that can be used for phytoremediation of Cd/Zn polluted and degraded ecosystems, including investigation of the role of externally supplied sulphur compounds in the nutrient solution of the Cd/Zn hyperaccumulator Thlaspi praecox, that may alter leaf Cd distribution and Cd ligand environment [2]; biofortification, which aims to increase essential elements (Fe) concentrations in the edible plant parts [3]; microbial regulation of metal (Fe, Pd) uptake and formation of Fe-oxide and Pd nanoparticles, encapsulated in exopolysaccharide to avoid iron toxicity under anaerobic conditions, discovered on a strain of Klebsiella oxytoca, isolated from acid pyrite-mine drainage[4].info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion22nd International Congress on X-ray Optics and Microanalysis, ICXOM22, Hamburg, Germany, 2013-09-02 - 2013-09-062013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154275https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00887%22Researchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1543992025-07-17T12:29:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAubry, N.Auffray, E.Damon, C.Doroud, K.Fischer, J -MFornaro, G.Fourmigue, J -MFrisch, B.Fürst, B.Gardiazabal, J.Garutti, E.Gadow, KarstenMimoun, F. B.Gaston, C.Gil-Ortiz, A.Guedj, E.Harion, T.Jarron, P.Kabadanian, J.Lasser, T.Laugier, R.Lecoq, P.Lombardo, D.Brillouet, N.Mandai, S.Mas, E.Meyer, T.Mundler, O.Navab, N.Ortigão, C.Paganoni, M.Perrodin, D.Pizzichemi, M.Prior, J. O.Bugalho, R.Reichl, T.Reinecke, M.Rolo, M.Schultz-Coulon, H -CSchwaiger, M.Shen, W.Silenzi, A.Silva, J. C.Silva, R.Schweiger, I SomlaiCharbon, E.Stamen, R.Traub, J.Varela, J.Veckalns, V.Vidal, V.Vishwas, J.Wendler, T.Xu, ChenZiegler, S.Zvolsky, M.Charles, O.Cortinovis, DanieleCourday, P.Cserkaszky, A.EndoTOFPET-US: a novel multimodal tool for endoscopy and positron emission tomographyinfo:eu-repo/classification/ddc/610The EndoTOFPET-US project aims to develop a multimodal detector to foster the development of new biomarkers for prostate and pancreatic tumors. The detector will consist of two main components: an external plate, and a PET extension to an endoscopic ultrasound probe. The external plate is an array of LYSO crystals read out by silicon photomultipliers (SiPM) coupled to an Application Specific Integrated Circuit (ASIC). The internal probe will be an highly integrated and miniaturized detector made of LYSO crystals read out by a fully digital SiPM featuring photosensor elements and digital readout in the same chip. The position and orientation of the two detectors will be tracked with respect to the patient to allow the fusion of the metabolic image from the PET and the anatomic image from the ultrasound probe in the time frame of the medical procedure. The fused information can guide further interventions of the organ, such as biopsy or in vivo confocal microscopy.Journal of Instrumentation 8(04), C04002 (2013). doi:10.1088/1748-0221/8/04/C04002info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion14th INTERNATIONAL WORKSHOP ON RADIATION IMAGING DETECTORS, iworid 2012, FIGUEIRA DA FOZ, PORTUGAL, 2012-07-01 - 2012-07-05Inst. of Physics2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-04-02DEhttps://bib-pubdb1.desy.de/record/154399https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00912%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00912info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/8/04/C04002info:eu-repo/semantics/altIdentifier/wos/WOS:000317462400002info:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/grantAgreement/EC//256984
oai:bib-pubdb1.desy.de:1544612025-07-17T12:29:15Zec_fundedresourcesVDBopenaireengJanssens, KoenAlfeld, MatthiasMiliani, CostanzaBrunetti, Brunetto G.Van der Snickt, GeertDe Nolf, WoutVanmeert, FrederikRadepont, MarieMonico, LetiziaDik, JorisCotte, MarineFalkenberg, GeraldThe Use of Synchrotron Radiation for the Characterization of Artists' Pigments and Paintingsinfo:eu-repo/classification/ddc/540Palo Alto, Calif. : Annual Reviews, Annual Review of Analytical Chemistry 6, (2013). doi:10.1146/annurev-anchem-062012-092702info:eu-repo/semantics/reviewinfo:eu-repo/semantics/publishedVersionAnnual Review of Analytical ChemistryAnnual Review of Analytical ChemistryAnnual Reviews2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/154461https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00944%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:23772661info:eu-repo/semantics/altIdentifier/doi/10.1146/annurev-anchem-062012-092702info:eu-repo/semantics/altIdentifier/issn/1936-1335info:eu-repo/semantics/altIdentifier/issn/1936-1327info:eu-repo/semantics/altIdentifier/wos/WOS:000323887500019info:eu-repo/semantics/altIdentifier/isbn/91-628-6314-2info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1544652025-07-30T13:16:54Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMakhov, VladimirVanetsev, A. S.Khaidukov, N. M.Yin, M.Wei, X. T.Kotlov, A.Belsky, AndreiIntrinsic and impurity luminescence of rare earth ions doped KY$F_4$ nanophosphorsinfo:eu-repo/classification/ddc/530The KYF4 nanopowders, non-doped and doped with Ce3+ or Tb3+, having well-crystallized, unaggregated, monodisperse (±15%) nanoparticles with the cubic (the size in the range from ∼15 to ∼30 nm) or hexagonal (from ∼30 to ∼50 nm) crystal structure have been successfully synthesized by microwave-hydrothermal treatment of as-precipitated gels. In KYF4 hexagonal nanopowders an intense STE-type luminescence at ∼4.4 eV was observed which is not quenched at room temperature. In contrast to single crystals or cubic nanopowders, in KYF4 hexagonal nanopowders doped with Ce3+ or Tb3+, a rather efficient energy transfer is observed from the host to Ce3+ or Tb3+ ions, respectively, because of overlapping the emission spectrum of STE-type luminescence and the spectrum of efficient absorption on 4f-5d transitions in Ce3+ or Tb3+.Radiation measurements 56, 393 - 396 (2013). doi:10.1016/j.radmeas.2013.01.070info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-01-30DEhttps://bib-pubdb1.desy.de/record/154465https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00948%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00948info:eu-repo/semantics/altIdentifier/issn/1350-4487info:eu-repo/semantics/altIdentifier/wos/WOS:000325671400089info:eu-repo/semantics/altIdentifier/issn/1879-0925info:eu-repo/semantics/altIdentifier/doi/10.1016/j.radmeas.2013.01.070info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1544672025-07-17T12:30:33Zec_fundedresourcesVDBopenaireengOja, MarekFeldbach, EduardKotlov, AlekseiMändar, HugoVielhauer, SebastianKirm, MarcoIntrinsic and extrinsic luminescence of nanosize transition alumina powdersinfo:eu-repo/classification/ddc/530Luminescence spectroscopy in the VUV-visible range under electron-beam excitation and synchrotron radiation was applied to investigate electronic properties of alumina nanopowders, which were prepared using the combustion synthesis method. By varying reaction and post treatment conditions we were able to prepare phase pure samples and powders with mixtures of α- and γ-phases mainly. In addition to the well-known 7.6 eV luminescence of STE of α-alumina, all samples possessed complex emission bands in UV range (3–5 eV) which originate from intrinsic excitonic emissions and extrinsic electronic excitations.Radiation measurements 56, 411 - 414 (2013). doi:10.1016/j.radmeas.2013.01.067info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/154467https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00950%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000325671400093info:eu-repo/semantics/altIdentifier/issn/1350-4487info:eu-repo/semantics/altIdentifier/issn/1879-0925info:eu-repo/semantics/altIdentifier/doi/10.1016/j.radmeas.2013.01.067info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1544682025-07-30T13:16:51Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNagirnyi, V.Aleksanyan, E.Romet, I.Seeman, V.Corradi, G.Danilkin, M.Feldbach, E.Kerikmäe, M.Kotlov, A.Lust, A.Polgár, K.Ratas, A.Recombination luminescence in $Li_2$$B_4$$O_7$ doped with manganese and copperinfo:eu-repo/classification/ddc/530Non-irradiated and irradiated ceramics of Li2B4O7:Mn, Li2B4O7:Mn,Be, and Li2B4O7:Mn,Cu were studied using electron paramagnetic resonance and luminescence spectroscopy. The emission of Mn2+ centres is observed in the thermoluminescence spectra of the low-temperature and dosimetric high-temperature glow peaks in irradiated samples. Arguments are given in favour of hole mobility being responsible for the dosimetric thermoluminescence peak at 490 K in Li2B4O7:Mn. The co-doping of Li2B4O7:Mn with Cu+ is shown to increase the sensitivity of the material to ionizing radiation.Radiation measurements 56, 192 - 195 (2013). doi:10.1016/j.radmeas.2013.02.005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-02-26DEhttps://bib-pubdb1.desy.de/record/154468https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00951%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.radmeas.2013.02.005info:eu-repo/semantics/altIdentifier/issn/1350-4487info:eu-repo/semantics/altIdentifier/wos/WOS:000325671400044info:eu-repo/semantics/altIdentifier/issn/1879-0925info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00951info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1545022025-07-30T13:17:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSchnürer, M.Andreev, A. A.Abicht, F.Bränzel, J.Koschitzki, Ch.Platonov, K. Yu.Priebe, G.Sandner, W.The beat in laser-accelerated ion beamsinfo:eu-repo/classification/ddc/530Regular modulation in the ion velocity distribution becomes detectable if intense femtosecond laser pulses with very high temporal contrast are used for target normal sheath acceleration of ions. Analytical and numerical analysis of the experimental observation associates the modulation with the half-cycle of the driving laser field period. In processes like ion acceleration, the collective and laser-frequency determined electron dynamics creates strong fields in plasma to accelerate the ions. Even the oscillatory motion of electrons and its influence on the acceleration field can dominate over smoothing effects in plasma if a high temporal contrast of the driving laser pulse is given. Acceleration parameters can be directly concluded out of the experimentally observed modulation period in ion velocity spectra. The appearance of the phenomenon at a temporal contrast of ten orders between the intensity of the pulse peak and the spontaneous amplified emission background as well as remaining intensity wings at picosecond time-scale might trigger further parameter studies with even higher contrast.Physics of plasmas 20(10), 103102 (2013). doi:10.1063/1.4824115info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Institute of Physics2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-10-03DEhttps://bib-pubdb1.desy.de/record/154502https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00953%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4824115info:eu-repo/semantics/altIdentifier/issn/1070-664Xinfo:eu-repo/semantics/altIdentifier/issn/1089-7674info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00953info:eu-repo/semantics/altIdentifier/wos/WOS:000326644100078info:eu-repo/grantAgreement/EC//284464
oai:bib-pubdb1.desy.de:1545292025-07-30T13:17:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLushchik, AleksandrLushchik, CheslavKudryavtseva, IrinaMaaroos, AarneNagirnyi, VitaliSavikhin, FjodorResonant processes causing photon multiplication in CaS$O_4$:$Tb^{3+}$info:eu-repo/classification/ddc/530The emission spectra of single and polyterbium centers have been measured at the excitation of CaSO4:Tb3+ phosphors with different charge compensators (Na+, calcium vacancies, etc.) by 3.8–35 eV photons or 5 and 300 keV electrons at 6–300 K. The possible mechanisms providing quantum yield above unity for green (5D4 → 7FJ) and blue emission (5D3 → 7FJ) of Tb3+ at the direct intracenter excitation, excitation of oxyanions or creation of hot (nonrelaxed) electrons and holes have been discussed. On the basis of thermally stimulated luminescence at 6–600 K, the peculiarities of the hopping diffusion of relaxed electrons and holes and their tentative low-temperature self-trapping have been considered.Radiation measurements 56, 139 -142 (2013). doi:10.1016/j.radmeas.2013.01.037info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-02-24DEhttps://bib-pubdb1.desy.de/record/154529https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00972%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000325671400032info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-00972info:eu-repo/semantics/altIdentifier/issn/1350-4487info:eu-repo/semantics/altIdentifier/doi/10.1016/j.radmeas.2013.01.037info:eu-repo/semantics/altIdentifier/issn/1879-0925info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1545332025-07-30T13:17:09Zec_fundedresourcesVDBopenaireengZorenko, Y.Gorbenko, V.Savchyn, V.Zorenko, T.Martin, T.Douissard, P.-A.Nikl, M.Mares, J. A.Luminescent properties and energy transfer processes in Ce–Tb doped single crystalline film screens of Lu-based silicate, perovskite and garnet compoundsinfo:eu-repo/classification/ddc/530The work is dedicated to the development of scintillating screens based on the single crystalline films (SCF) of Ce,Tb doped Lu-based silicates, perovskites and garnets grown by the liquid phase epitaxy method. We confirm in this work the presence of the Ce → Tb energy transfer in LSO and LuAP hosts. We also show that in Ce–Tb doped LuAG SCF, the effective Tb → Ce energy transfer is observed. This results in increasing the light yield of the luminescence of double doped LuAG:Ce,Tb SCF up to 25–30% with respect to single Ce doped (Y,Lu)AG SCF counterparts at optimal ratio of Ce/Tb ions.Radiation measurements 56, 415 - 419 (2013). doi:10.1016/j.radmeas.2013.01.042info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/154533https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-00976%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1350-4487info:eu-repo/semantics/altIdentifier/doi/10.1016/j.radmeas.2013.01.042info:eu-repo/semantics/altIdentifier/wos/WOS:000325671400094info:eu-repo/semantics/altIdentifier/issn/1879-0925info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1546432025-07-30T13:17:04Zec_fundedresourcesVDBopenaireengVartanov, GrigoryGahramanov, IlmarSuperconformal Indices and Partition Functions for Superszmmetric Field TheoriesRecently there was a substantial progress in understanding of supersymmetric theories (in particular, their BPS spectrum) in space-times of different dimensions due to the exact computation of superconformal indices and partition functions using localization method. Here we discuss a connection of 4d superconformal indices and 3d partition functions using a particular example of supersymmetric theories with matter in antisymmetric representation.Read More: http://www.worldscientific.com/doi/abs/10.1142/9789814449243_0076WORLD SCIENTIFIC 9 pp. (2013). doi:10.1142/9789814449243_0076info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion17th International Congress on Mathematical Physics, Aalborg, Denmark, 2012-08-06 - 2012-08-11WORLD SCIENTIFIC2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/154643https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01003%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1142/9789814449243_0076info:eu-repo/semantics/altIdentifier/isbn/978-981-4449-23-6 (print)info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1547242021-11-10T11:26:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengQuella, ThomasSchomerus, VolkerSuperspace conformal field theoryConformal sigma models and WZW models on coset superspaces provide important examples of logarithmic conformal field theories. They possess many applications to problems in string and condensed matter theory. We review recent results and developments, including the general construction of WZW models on type I supergroups, the classification of conformal sigma models and their embedding into string theory.50 pp. (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154724https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01063%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1307.7724info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1547862020-05-29T08:37:22Zec_fundedresourcesVDBopenaireengHatsuda, YasuyukiMarino, MarcosMoriyama, SanefumiOkuyama, KazumiNon-perturbative effects and the refined topological string arXivThe partition function of ABJM theory on the three-sphere has non-perturbative corrections due to membrane instantons in the M-theory dual. We show that the full series of membrane instanton corrections is completely determined by the refined topological string on the Calabi-Yau manifold known as local P1xP1, in the Nekrasov-Shatashvili limit. Our result can be interpreted as a first-principles derivation of the full series of non-perturbative effects for the closed topological string on this Calabi-Yau background. Based on this, we make a proposal for the non-perturbative free energy of topological strings on general, local Calabi-Yau manifolds. arXivinfo:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/154786https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01099%22Researchersinfo:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1547872025-07-30T13:17:19Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHatsuda, YasuyukiHonda, MasazumiMoriyama, SanefumiOkuyama, KazumiABJM Wilson Loops in Arbitrary Representationsinfo:eu-repo/classification/ddc/530We study vacuum expectation values (VEVs) of circular half BPS Wilson loops in arbitrary representations in ABJM theory. We find that those in hook representations are reduced to elementary integrations thanks to the Fermi gas formalism, which are accessible from the numerical studies similar to the partition function in the previous studies. For non-hook representations, we show that the VEVs in the grand canonical formalism can be exactly expressed as determinants of those in the hook representations. Using these facts, we can study the instanton effects of the VEVs in various representations. Our results are consistent with the worldsheet instanton effects studied from the topological string and a prescription to include the membrane instanton effects by shifting the chemical potential, which has been successful for the partition function.Journal of high energy physics 1310, 168 (2013). doi:10.1007/JHEP10(2013)168info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154787https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01100%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP10(2013)168info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-01100info:eu-repo/semantics/altIdentifier/wos/WOS:000326084100001info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1548042021-11-10T11:26:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBao, LingMitev, VladimirPomoni, ElliTaki, MasatoYagi, FutoshiNon-Lagrangian Theories from Brane JunctionsIn this article we use 5-brane junctions to study the 5D T_N SCFTs corresponding to the 5D N=1 uplift of the 4D N=2 strongly coupled gauge theories, which are obtained by compactifying N M5 branes on a sphere with three full punctures. Even though these theories have no Lagrangian description, by using the 5-brane junctions proposed by Benini, Benvenuti and Tachikawa, we are able to derive their Seiberg-Witten curves and Nekrasov partition functions. We cross-check our results with the 5D superconformal index proposed by Kim, Kim and Lee. Through the AGTW correspondence, we discuss the relations between 5D superconformal indices and n-point functions of the q-deformed W_N Toda theories.66 pp. (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154804https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01113%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.3841info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1548052021-11-10T11:26:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengPomoni, Elli Integrability in $N=2$ superconformal gauge theoriesAny N=2 superconformal gauge theory (including N=4 SYM) contains a set of local operators made only out of fields in the N=2 vector multiplet that is closed under renormalization to all loops, namely the SU(2,1|2) sector. For planar N=4 SYM the spectrum of local operators can be obtained by mapping the problem to an integrable model (a spin chain in perturbation theory), in principle for any value of the coupling constant. We present a diagrammatic argument that for any planar N=2 superconformal gauge theory the SU(2,1|2) Hamiltonian acting on infinite spin chains is identical to all loops to that of N=4 SYM, up to a redefinition of the coupling constant. Thus, this sector is integrable and anomalous dimensions can be, in principle, read off from the N=4 ones up to this redefinition.42 pp. (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154805https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01114%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.5709info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1548692021-11-10T11:26:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, J.Kotanski, J.Schomerus, V.Sprenger, M.The Excited Hexagon ReloadedThis work revisits the computation of six-gluon scattering amplitudes in the high energy limit of strongly coupled N=4 supersymmetric Yang-Mills theory. It is based on previous studies in which we showed that the amplitude simplifies in the Regge regime and outlined an efficient computational scheme. By exploiting a symmetry of the underlying equations we are now able to argue that a term we had seen in preliminary numerical studies must vanish identically. The derived formula for the Regge limit of the 6-gluon scattering amplitude at strong coupling differs from the one we had conjectured previously.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154869https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01141%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1311.1512info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1549662025-07-30T13:17:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDa Pieve, F.Hogan, C.Lamoen, D.Verbeeck, J.Vanmeert, F.Radepont, M.Cotte, M.Janssens, K.Gonze, X.Van Tendeloo, G.Casting Light on the Darkening of Colors in Historical Paintingsinfo:eu-repo/classification/ddc/550The degradation of colors in historical paintings affects our cultural heritage in both museums and archeological sites. Despite intensive experimental studies, the origin of darkening of one of the most ancient pigments known to humankind, vermilion (α-HgS), remains unexplained. Here, by combining many-body theoretical spectroscopy and high-resolution microscopic x-ray diffraction, we clarify the composition of the damaged paint work and demonstrate possible physicochemical processes, induced by illumination and exposure to humidity and air, that cause photoactivation of the original pigment and the degradation of the secondary minerals. The results suggest a new path for the darkening process which was never considered by previous studies and prompt a critical examination of their findings.Physical review letters 111(20), 208302 (2013). doi:10.1103/PhysRevLett.111.208302info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/154966https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01193%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:24289712info:eu-repo/semantics/altIdentifier/wos/WOS:000327244500003info:eu-repo/semantics/altIdentifier/issn/1079-7114info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.111.208302info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1551692021-11-10T11:27:26Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAirapetian, A.Akopov, N.Blok, H. P.Schnell, G.Seitz, B.Shibata, T. A.Shutov, V.Stancari, M.Statera, M.Steffens, E.Steijger, J. J. M.Stewart, J.Stinzing, F.Borissov, A.Taroian, S.Terkulov, A.Truty, R.Trzcinski, A.Tytgat, M.Van Haarlem, Y.Van Hulse, C.Veretennikov, D.Vikhrov, V.Vilardi, I.Bowles, J.Wang, SiguangYaschenko, S.Ye, Z.Yen, S.Yu, W.Zagrebelnyy, V.Zeiler, D.Zihlmann, B.Zupranski, P.HERMES CollaborationBryzgalov, V.Burns, J.Capiluppi, M.Capitani, G. P.Cisbani, E.Ciullo, G.Contalbrigo, M.Akopov, ZavenDalpiaz, P. F.Deconinck, W.De Leo, R.De Nardo, L.De Sanctis, E.Diefenthaler, M.Di Nezza, P.Duren, M.Ehrenfried, M.Elbakian, G.Aschenauer, E. C.Ellinghaus, F.Fabbri, R.Fantoni, A.Felawka, L.Frullani, S.Gabbert, D.Gapienko, G.Gapienko, V.Gavrilov, G.Gharibyan, V.Augustyniak, W.Giordano, F.Gliske, S.Golembiovskaya, M.Hadjidakis, C.Hartig, M.Hasch, D.Hillenbrand, A.Hoek, M.Holler, Y.Hristova, I.Avakian, R.Ivanilov, A.Jackson, H. E.Joosten, S.Kaiser, R.Karyan, G.Keri, T.Kinney, E.Kisselev, A.Korotkov, V.Kozlov, V.Avetissian, A.Kravchenko, P.Krivokhijine, V. G.Lagamba, L.Lapikas, L.Lehmann, I.Lenisa, P.Lopez Ruiz, A.Lorenzon, W.Ma, B. Q.Mahon, D.Avetisyan, E.Makins, N. C. R.Manaenkov, S. I.Mao, Y.Marianski, B.Martinez de la Ossa, A.Marukyan, H.Miller, C. A.Miyachi, Y.Movsisyan, A.Murray, M.Belostotski, S.Mussgiller, A.Nappi, E.Naryshkin, Y.Negodaev, M.Nowak, W. D.Pappalardo, L. L.Perez-Benito, R.Petrosyan, A.Raithel, M.Reimer, P. E.Bianchi, N.Reolon, A. R.Riedl, C.Rith, K.Rosner, G.Rostomyan, A.Rubin, J.Ryckbosch, D.Salomatin, Y.Sanftl, F.Schafer, A.Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaonsSingle-spin asymmetries were investigated in inclusive electroproduction of charged pions and kaons from transversely polarized protons at the HERMES experiment. The asymmetries were studied as a function of the azimuthal angle $\psi$ about the beam direction between the target-spin direction and the hadron production plane, the transverse hadron momentum relative to the direction of the incident beam, and the Feynman variable $x_F$. The $\sin(\psi)$ amplitudes are positive for positive pions and kaons, slightly negative for negative pions and consistent with zero for negative kaons, with particular transverse-momentum but weak $x_F$ dependences. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded by the spectrometer. arXivinfo:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155169https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01312%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1551702021-11-10T11:27:27Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAirapetian, AvetikAkopov, N.Bowles, J.Taroian, S.Terkulov, A.Truty, R.Trzcinski, A.Tytgat, M.Van Haarlem, Y.Van Hulse, C.Vikhrov, V.Vilardi, I.Wang, SiguangBrodski, I.Yaschenko, S.Ye, Z.Yen, S.Zagrebelnyy, V.Zihlmann, B.Zupranski, P.HERMES CollaborationBryzgalov, V.Burns, J.Capitani, G. P.Cisbani, E.Ciullo, G.Contalbrigo, M.Dalpiaz, P. F.Deconinck, W.Aschenauer, E. C.De Leo, R.De Sanctis, E.Diefenthaler, M.Di Nezza, P.Duren, M.Ehrenfried, M.Elbakian, G.Ellinghaus, F.Etzelmuller, E.Fabbri, R.Augustyniak, W.Frullani, S.Gapienko, G.Gapienko, V.Garay Garcia, JasoneGaribaldi, F.Gavrilov, G.Gharibyan, V.Giordano, F.Gliske, S.Hartig, M.Avakian, R.Hasch, D.Holler, Y.Hristova, I.Ivanilov, A.Jackson, H. E.Joosten, S.Kaiser, R.Karyan, G.Keri, T.Kinney, E.Avetissian, A.Kisselev, A.Korotkov, V.Kozlov, V.Kravchenko, P.Krivokhijine, V. G.Lagamba, L.Lapikas, L.Lehmann, I.Lenisa, P.Lorenzon, W.Avetisyan, E.Lu, X. G.Ma, B. Q.Mahon, D.Makins, N. C. R.Manaenkov, S. I.Mao, Y.Marianski, B.Marukyan, H.Miller, C. A.Miyachi, Y.Blok, H. P.Movsisyan, A.Muccifora, V.Murray, M.Mussgiller, A.Naryshkin, Y.Nass, A.Negodaev, M.Nowak, W. D.Pappalardo, L. L.Perez-Benito, R.Bottcher, H.Petrosyan, AnushReimer, P. E.Reolon, A. R.Riedl, C.Rith, K.Rosner, G.Rostomyan, A.Rubin, J.Ryckbosch, D.Salomatin, Y.Borissov, A.Schafer, A.Schnell, G.Seitz, B.Shibata, T. A.Stahl, M.Statera, M.Steffens, E.Steijger, J. J. M.Stewart, J.Stinzing, F.Beam-helicity asymmetry in associated electroproduction of real photons $ep \to e\gamma \pi N$ in the $\Delta$-resonance regionThe beam-helicity asymmetry in associated electroproduction of real photons, $ep\to e\gamma \pi N$, in the $\Delta$(1232)-resonance region is measured using the longitudinally polarized HERA positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, $ep\to e\gamma \pi^0 p$ and $ep\to e\gamma \pi^+ n$, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155170https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01313%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.5081info:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1552062021-11-10T11:27:29Zdnbdeliveryec_fundedresourcesdriveropen_accessopenaireengAirapetian, AvetikAkopov, N.Blok, H. P.Schnell, GunarSeitz, B.Shibata, T. A.Shutov, V.Stancari, M.Statera, M.Steffens, E.Steijger, J. J. M.Stewart, J.Stinzing, F.Borissov, A.Taroian, S.Terkulov, A.Truty, R.Trzcinski, A.Tytgat, M.Van Haarlem, Y.Van Hulse, C.Veretennikov, D.Vikhrov, V.Vilardi, I.Bowles, J.Wang, SiguangYaschenko, S.Ye, Z.Yen, S.Yu, W.Zagrebelnyy, V.Zeiler, D.Zihlmann, B.Zupranski, P.HERMES CollaborationBryzgalov, V.Burns, J.Capiluppi, M.Capitani, G. P.Cisbani, E.Ciullo, G.Contalbrigo, M.Akopov, ZavenDalpiaz, P. F.Deconinck, W.De Leo, R.De Nardo, L.De Sanctis, E.Diefenthaler, M.Di Nezza, P.Dueren, MichaelEhrenfried, M.Elbakian, G.Aschenauer, E. C.Ellinghaus, F.Fabbri, R.Fantoni, A.Felawka, L.Frullani, S.Gabbert, D.Gapienko, G.Gapienko, V.Gavrilov, G.Gharibyan, V.Augustyniak, W.Giordano, F.Gliske, S.Golembiovskaya, M.Hadjidakis, C.Hartig, M.Hasch, D.Hillenbrand, A.Hoek, M.Holler, Y.Hristova, I.Avakian, R.Ivanilov, A.Jackson, H. E.Joosten, S.Kaiser, R.Karyan, G.Keri, T.Kinney, E.Kisselev, A.Korotkov, V.Kozlov, V.Avetissian, A.Kravchenko, P.Krivokhijine, V. G.Lagamba, L.Lapikas, L.Lehmann, I.Lenisa, P.Lopez Ruiz, A.Lorenzon, W.Ma, B. Q.Mahon, D.Avetisyan, E.Makins, N. C. R.Manaenkov, S. I.Mao, Y.Marianski, B.Martinez de la Ossa, A.Marukyan, H.Miller, C. A.Miyachi, Y.Movsisyan, A.Murray, M.Belostotski, S.Mussgiller, A.Nappi, E.Naryshkin, Y.Negodaev, M.Nowak, W. D.Pappalardo, L. L.Perez-Benito, R.Petrosyan, AnushRaithel, M.Reimer, P. E.Bianchi, N.Reolon, A. R.Riedl, C.Rith, K.Rosner, G.Rostomyan, A.Rubin, J.Ryckbosch, D.Salomatin, Y.Sanftl, F.Schafer, A.info:eu-repo/classification/ddc/530electron p: inclusive reactionhadron: momentumspin: asymmetrypi: electroproductionpolarized target: transversetransverse momentum dependenceangular dependenceHERMESK: electroproductionx-dependencecharge dependenceexperimental resultsDESY HERA Stor27.6 GeVSingle-spin asymmetries were investigated in inclusive electroproduction of charged pions and kaons from transversely polarized protons at the HERMES experiment. The asymmetries were studied as a function of the azimuthal angle $\psi$ about the beam direction between the target-spin direction and the hadron production plane, the transverse hadron momentum relative to the direction of the incident beam, and the Feynman variable $x_F$. The $\sin(\psi)$ amplitudes are positive for positive pions and kaons, slightly negative for negative pions and consistent with zero for negative kaons, with particular transverse-momentum but weak $x_F$ dependences. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded by the spectrometer.Physics letters / B 728, 183-190 (2014). doi:10.1016/j.physletb.2013.11.021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155206https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01334%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.5070info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2013.11.021info:eu-repo/semantics/altIdentifier/issn/1873-2445info:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1552232017-02-10T22:09:25Zec_fundedresourcesVDBopenaireengDiener, RalfPCMAG Solenoid Upgrade and DESY Testbeam Area T24/1info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA 2nd Annual Meeting 2013, Frascati, Italy, 2013-04-10 - 2013-04-122013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/155223https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01351%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1552372021-11-10T11:27:36Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuesser, KarstenThe International Linear ColliderThe International Linear Collider (ILC) is a proposed electron-positron collider for the centre-of mass energy range of 200 to 500 GeV and with upgrade options towards 1 TeV. The ILC would be the ideal tool to explore with high precision the properties of the new Higgs-like particle that has recently been discovered at the LHC with a mass of around 125 GeV. The ILC accelerator design is based on the mature superconducting technology that has been developed in the TESLA collaboration and that is currently being used for the European XFEL. The exploitation of the huge physics potential of the ILC is a challenge for the design of the ILC detectors.Proceedings of Science 013, (2013).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion12th Hellenic School and Workshops on Elementary Particle Physics and Gravity, Corfu2012, Corfu, Greece, 2012-09-08 - 2012-12-272013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155237https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01363%22Researchersinfo:eu-repo/grantAgreement/EC//206711
oai:bib-pubdb1.desy.de:1552782025-07-30T13:17:53Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengQuella, ThomasSchomerus, VolkerSuperspace conformal field theoryinfo:eu-repo/classification/ddc/530Conformal sigma models and Wess?Zumino?Witten (WZW) models on coset superspaces provide important examples of logarithmic conformal field theories. They possess many applications to problems in string and condensed matter theory. We review recent results and developments, including the general construction of WZW models on type-I supergroups, the classification of conformal sigma models and their embedding into string theory.Journal of physics / A 46(49), 494010 (2013). doi:10.1088/1751-8113/46/49/494010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-11-20DEhttps://bib-pubdb1.desy.de/record/155278https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01397%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/1751-8113/46/49/494010info:eu-repo/semantics/altIdentifier/issn/1751-8121info:eu-repo/semantics/altIdentifier/issn/0305-4470info:eu-repo/semantics/altIdentifier/issn/1361-6447info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-01397info:eu-repo/semantics/altIdentifier/issn/1751-8113info:eu-repo/semantics/altIdentifier/wos/WOS:000327763300011info:eu-repo/semantics/altIdentifier/issn/0301-0015info:eu-repo/semantics/altIdentifier/issn/0022-3689info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1552822025-07-30T13:18:00Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCandu, ConstantinMitev, VladimirSchomerus, VolkerSpectra of coset sigma modelsinfo:eu-repo/classification/ddc/530Nuclear physics <Amsterdam> / B 877(3), 900 - 935 (2013). doi:10.1016/j.nuclphysb.2013.10.026info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155282https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01401%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000328796400012info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2013.10.026info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2013-01401info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1557422021-11-10T11:27:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, SergeyBlümlein, JohannesMoch, Sven-OlafABM news and benchmarksRed Report (2013).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155742https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01403%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1308.5166info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1557432021-11-10T11:27:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, SergeyBlümlein, JohannesMoch, Sven-OlafHeavy-quark production in deep-inelastic scatteringWe report recent experimental and theoretical progress concerning the heavy-quark electro-production in the context of the ABM11 parton distribution function (PDF) fit. In the updated ABM11 analysis, including the recent combined HERA charm data, the MSbar-values of the c-quark mass m_c(m_c)=1.24 +- 0.03 (exp)\,^{+0.03}_{-0.02}(scale)\,^{+0.00}_{-0.07} (th) and m_c(m_c)=1.15\, +- 0.04 (exp)\,^{+0.04}_{-0.00} (scale) are determined at NNLO and NLO, respectively. The values of m_c obtained are compared to other determinations including the ones based on the various variable-flavor-number (VFN) scheme prescriptions.The VFN scheme uncertainties related to the matching of the 4(5)-flavor PDFs with the 3(4)-flavor ones are discussed.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155743https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01404%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1307.7258info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1557872021-11-10T11:27:44Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengXu, ChenGarutti, ErikaMandai, ShingoCharbon, EdoardoComparison of Digital and Analog Silicon Photomultiplier for Positron Emission Tomography Applicationinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013, Seoul, South Korea, 2013-10-27 - 2013-11-022013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155787https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01434%22Researchersinfo:eu-repo/grantAgreement/EC//256984
oai:bib-pubdb1.desy.de:1559432025-07-30T12:37:17Zec_fundedresourcesVDBopenaireengZougrou, Ioanna-MariaKatsikini, MariaPinakidou, FaniPaloura, EleniPapadopoulou, L.Tsoukala, E.Study of fossil bones by synchrotron radiation micro-spectroscopic techniques and scanning electron microscopyinfo:eu-repo/classification/ddc/540Earlymost Villafranchian fossil bones of an artiodactyl and a perissodactyl from the Milia excavation site in Grevena, Greece, were studied in order to evaluate diagenetic effects. Optical microscopy revealed the different bone types (fibro-lamellar and Haversian, respectively) of the two fragments and their good preservation state. The spatial distribution of bone apatite and soil-originating elements was studied using micro-X-ray fluorescence (µ-XRF) mapping and scanning electron microscopy. The approximate value of the Ca/P ratio was 2.2, as determined from scanning electron microscopy measurements. Bacterial boring was detected close to the periosteal region and Fe bearing oxides were found to fill bone cavities, e.g. Haversian canals and osteocyte lacunae. In the perissodactyl bone considerable amounts of Mn were detected close to cracks (the Mn/Fe weight ratio takes values up to 3.5). Goethite and pyrite were detected in both samples by means of metallographic microscopy. The local Ca/P ratio determined with µ-XRF varied significantly in metal-poor spots indicating spatial inhomogeneities in the ionic substitutions. XRF line scans that span the bone cross sections revealed that Fe and Mn contaminate the bones from both the periosteum and medullar cavity and aggregate around local maxima. The formation of goethite, irrespective of the local Fe concentration, was verified by the Fe K-edge X-ray absorption fine structure (XAFS) spectra. Finally, Sr K-edge extended XAFS (EXAFS) revealed that Sr substitutes for Ca in bone apatite without obvious preference to the Ca1 or Ca2 unit-cell site occupation.Journal of synchrotron radiation 21, 149-160 (2014). doi:10.1107/S1600577513025228info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIUCr2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/155943https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01540%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0909-0495info:eu-repo/semantics/altIdentifier/wos/WOS:000328939400020info:eu-repo/semantics/altIdentifier/pmid/pmid:24365930info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600577513025228info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1559442021-11-10T11:28:01Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAirapetian, AvetikAkopov, N.Bryzgalov, V.Tytgat, M.Van Haarlem, Y.Van Hulse, C.Veretennikov, D.Vikhrov, V.Vilardi, I.Vogel, C.Wang, SiguangYaschenko, S.Ye, Z.Burns, J.Yen, S.Zihlmann, B.Zupranski, P.Capiluppi, M.Capitani, G. P.Cisbani, E.Ciullo, G.Contalbrigo, M.Dalpiaz, P. F.Deconinck, W.De Leo, R.Akopov, Z.De Sanctis, E.Diefenthaler, M.Di Nezza, P.Düren, M.Ehrenfried, M.Elbakian, G.Ellinghaus, FrankEtzelmüller, E.Felawka, L.Frullani, S.Aschenauer, E. C.Gabbert, D.Gapienko, G.Gapienko, V.Garay Garcia, JasoneGaribaldi, F.Gavrilov, G.Gharibyan, V.Giordano, F.Gliske, S.Hartig, M.Augustyniak, W.Hasch, D.Hoek, M.Holler, Y.Hristova, I.Jackson, HaroldJoosten, S.Kaiser, R.Karyan, G.Keri, TiborKinney, E.Avetissian, A.Kisselev, A.Korotkov, V.Kozlov, V.Kravchenko, P.Krivokhijine, V. G.Lagamba, L.Lapikás, L.Lehmann, I.Lenisa, P.Lorenzon, W.Avetisyan, E.Ma, BoqiangMahon, D.Manaenkov, S. I.Mao, Y.Marianski, B.Marukyan, H.Miyachi, Y.Movsisyan, A.Muccifora, V.Murray, M.Belostotski, S.Mussgiller, A.Naryshkin, Y.Nass, A.Negodaev, M.Nowak, W. -D.Pappalardo, L. L.Perez-Benito, R.Petrosyan, AnushReimer, P. E.Reolon, A. R.Blok, H. P.Riedl, C.Rith, K.Rosner, G.Rostomyan, A.Rubin, J.Ryckbosch, D.Salomatin, Y.Schäfer, A.Schnell, GunarSeitz, B.Borissov, A.Shibata, T. -A.Stahl, M.Statera, M.Steffens, E.Steijger, J. J. M.Stinzing, F.Taroian, S.Terkulov, A.Truty, R.Trzcinski, A.Reevaluation of the Parton Distribution of Strange Quarks in the NucleonAn earlier extraction from the HERMES experiment of the polarization-averaged parton distribution of strange quarks in the nucleon has been reevaluated using final data on the multiplicities of charged kaons in semi-inclusive deep-inelastic scattering obtained with a kinematically more comprehensive method of correcting for experimental effects. General features of the distribution are confirmed, but the rise at low $x$ is less pronounced than previously reported.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/155944https://bib-pubdb1.desy.de/search?p=id:%22DESY-2013-01541%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.7028info:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1560242021-11-10T11:30:03Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengXu, ChenGarutti, ErikaMandaiCharbonComparison of Digital and Analog Silicon Photomultiplier For Positron Emission Tomography Applicationinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013, Seoul, South Korea, 2013-10-27 - 2013-11-022013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156024https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00076%22Researchersinfo:eu-repo/grantAgreement/EC//256984
oai:bib-pubdb1.desy.de:1569002021-11-10T11:30:59Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Bluemlein, J.Moch, S.The ABM parton distributions tuned to LHC dataWe present a global fit of parton distributions at next-to-next-to-leading order (NNLO) in QCD. The fit is based on the world data for deep-inelastic scattering, fixed-target data for the Drell-Yan process and includes, for the first time, data from the Large Hadron Collider (LHC) for the Drell-Yan process and the hadro-production of top-quark pairs. The analysis applies the fixed-flavor number scheme for n_f=3,4,5, uses the MS-bar scheme for the strong coupling \alpha_s and the heavy-quark masses and keeps full account of the correlations among all non-perturbative parameters. At NNLO this returns the values of \alpha_s(M_Z) = 0.1132 +- 0.0011 and m_t(pole) = 171.2 +- 2.4 GeV for the top-quark pole mass.The fit results are used to compute benchmark cross sections for Higgs production at the LHC to NNLO accuracy. We compare our results to those obtained by other groups and show that differences can be linked to different theoretical descriptions of the underlying physical processes.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156900https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00184%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.3059info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1569292025-07-17T09:28:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBehring, A.Blümlein, J.von Manteuffel, A.De Freitas, A.Pfoh, T.Raab, C.Round, M.Ablinger, J.Hasselhuhn, A.Schneider, C.Wißbrock, F.New Results on the 3-Loop Heavy Flavor Corrections in Deep-Inelastic Scatteringinfo:eu-repo/classification/ddc/530We report on recent progress in the calculation of the 3-loop massive Wilson coefficients in deep-inelastic scattering at general values of $N$ for neutral and charged current reactions in the asymptotic region $Q^2 \gg m^2$. Four new out of eight massive operator matrix elements and Wilson coefficients have been obtained recently. We also discuss recent results on Feynman graphs containing two-massive fermion lines and present complete results for the bubble topologies for all processes.Proceedings of Science (2014). doi:10.22323/1.197.0058info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of 11th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology) — PoS(RADCOR 2013) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.197.0058Proceedings of 11th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology) — PoS(RADCOR 2013) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.197.0058<br/>11th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology), RADCOR 2013, Durham, UK, 2013-09-22 - 2013-09-27SISSA2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156929https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00213%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.0124info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.197.0058info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1569372025-07-17T12:30:29Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengALEKHIN, SERGEYBLÜMLEIN, JOHANNESMOCH, SVEN-OLAFDetermination of a s and m c in Deep-Inelastic Scatteringinfo:eu-repo/classification/ddc/530We describe the determination of the strong coupling constant $\alpha_s(M_Z^2)$ and of the charm-quark mass $m_c(m_c)$ in the $\bar{\rm MS}$-scheme, based on the QCD analysis of the unpolarized World deep-inelastic scattering data. At NNLO the values of $\alpha_s(M_Z^2)=0.1134\pm 0.0011(\text{exp})$ and $m_c(m_c)=1.24 \pm 0.03 (\text{exp})\,^{+0.03}_{-0.02} (\text{scale})\,^{+0.00}_{-0.07} (\text{th})$ are obtained and are compared with other determinations, also clarifying discrepancies.Modern physics letters / A 28(26), 1360018 (2013). doi:10.1142/S0217732313600183info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInternational Workshop on Determination of the Fundamental Parameters of QCD: Part III, Singapore, Singapore, 2013-03-18 - 2013-03-21World Scientific Publ.2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156937https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00221%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0217-7323info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1307.1219info:eu-repo/semantics/altIdentifier/doi/10.1142/S0217732313600183info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1569612025-07-30T13:20:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Blümlein, J.Moch, S.Heavy-quark production in deep-inelastic scatteringinfo:eu-repo/classification/ddc/530We report recent experimental and theoretical progress concerning the heavy-quark electro-production in the context of the ABM11 parton distribution function (PDF) fit. In the updated ABM11 analysis, including the recent combined HERA charm data, the MSbar-values of the c-quark mass m_c(m_c)=1.24 +- 0.03 (exp)\,^{+0.03}_{-0.02}(scale)\,^{+0.00}_{-0.07} (th) and m_c(m_c)=1.15\, +- 0.04 (exp)\,^{+0.04}_{-0.00} (scale) are determined at NNLO and NLO, respectively. The values of m_c obtained are compared to other determinations including the ones based on the various variable-flavor-number (VFN) scheme prescriptions.The VFN scheme uncertainties related to the matching of the 4(5)-flavor PDFs with the 3(4)-flavor ones are discussed.Proceedings of Science (2013). doi:10.22323/1.191.0297info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2013) - Sissa Medialab Trieste, Italy, 2013. - ISBN - doi:10.22323/1.191.0297Proceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2013) - Sissa Medialab Trieste, Italy, 2013. - ISBN - doi:10.22323/1.191.0297<br/>XXI International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2013, Marseille, France, 2013-04-22 - 2013-04-26SISSA2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156961https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00230%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1307.7258info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.191.0297info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1569732021-11-10T11:31:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Blümlein, J.Moch, S.ABM news and benchmarksWe report on progress in the determination of the unpolarised nucleon PDFs within the ABM global fit framework. The data used in the ABM analysis are updated including the charm-production and the high-Q2 neutral-current samples obtained at the HERA collider, as well as the LHC data on the differential Drell-Yan cross-sections. An updated set of the PDFs with improved experimental and theoretical accuracy at small x is presented. We find minimal impact of the t-quark production cross section measured at the Tevatron and the LHC on the gluon distribution and the value of the strong coupling constant \alpha_s determined from the ABM fit in the case of the t-quark running-mass definition. In particular, the value of \alpha_s(M_Z)=0.1133(8) is obtained from the variant of the ABM12 fit with the Tevatron and CMS t-quark production cross-section data included and the MSbar value of m_t(m_t)=162 GeV.Trieste : SISSA 039 pp. (2013).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionXXI International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2013, Marseille, France, 2013-04-22 - 2013-04-26SISSA2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156973https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00242%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1308.5166info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1569872025-07-30T13:20:47Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDowling, MatthewMoch, Sven-OlafTop-quark Pair Production in a Running Mass Schemeinfo:eu-repo/classification/ddc/530Between the Tevatron and LHC, top-quark physics is now becoming an area for precision physics. This has lead to an increase in theoretical activity to match the experimental accuracy of top anti-top production. We discuss the difficulty in properly defining the top-quark mass as measured by experiments and present results for differential distributions of top-quark pair production in a running mass scheme. The use of such a scheme shows better convergence in the perturbative expansion and improves the scale dependence as opposed to the typical on-shell scheme.Proceedings of Science (2013). doi:10.22323/1.180.0214info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP 2013) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.180.0214Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP 2013) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.180.0214<br/>The European Physical Society Conference on High Energy Physics, EPS-HEP 2013, Stockholm, Sweden, 2013-07-18 - 2013-07-24SISSA2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/156987https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00256%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.22323/1.180.0214info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1311.0643info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1654062021-11-10T11:31:48Zec_fundedresourcesdriverVDBopen_accessopenaireengGaede, FrankIntroduction to WP2info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA 2nd Annual Meeting, Frascatti, Italy, 2013-04-10 - 2013-04-122013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165406https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00400%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1654102019-11-14T21:09:13Zec_fundedresourcesVDBopenaireengGaede, FrankAIDA WP2 Activitiesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA Mid-term Review, Paris, France, 2013-04-25 - 2013-04-252013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165410https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00404%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1655732021-11-10T11:32:10Zec_fundedresourcesdriverVDBopen_accessopenaireengGaede, FrankAplin, SteveVoutsinas, Georgios GerasimosRosemann, ChristophTrack Reconstruction at the ILCinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion20th International Conference on Computing in High Energy and Nuclear Physics 2013, Chep 2013, Amsterdam, Netherlands, 2013-10-14 - 2013-10-182013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165573https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00552%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1656162021-11-10T11:32:15Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengArmengaud, E.Avignone, F. T.Chelouche, D.Christensen, F. E.Dael, A.Dafni, T.Davenport, M.Derbin, A. V.Desch, K.Diago, A.Doebrich, BabetteDratchnev, I.Betz, M.Dudarev, A.Eleftheriadis, C.Fanourakis, G.Ferrer-Ribas, E.Galán, J.García, J. A.Garza, J. G.Geralis, T.Gimeno, B.Giomataris, I.Brax, P.Gninenko, S.Gómez, H.González-Díaz, D.Guendelman, E.Hailey, C. J.Hiramatsu, T.Hoffmann, D. H. H.Horns, D.Iguaz, F. J.Irastorza, I. G.Brun, P.Isern, J.Imai, K.Jakobsen, A. C.Jaeckel, J.Jakovčić, K.Kaminski, J.Kawasaki, M.Karuza, M.Krčmar, M.Kousouris, K.Cantatore, G.Krieger, C.Lakić, B.Limousin, O.Lindner, A.Liolios, A.Luzón, G.Matsuki, S.Muratova, V. N.Nones, C.Ortega, I.Carmona, J. M.Papaevangelou, T.Pivovaroff, M. J.Raffelt, G.Redondo, J.Ringwald, A.Russenschuck, S.Ruz, J.Saikawa, K.Savvidis, I.Sekiguchi, T.Carosi, G. P.Semertzidis, Y. K.Shilon, I.Sikivie, P.Silva, H.ten Kate, H.Tomas, A.Troitsky, S.Vafeiadis, T.van Bibber, K.Vedrine, P.Caspers, F.Villar, J. A.Vogel, J. K.Walckiers, L.Weltman, A.Wester, W.Yildiz, S. C.Zioutas, K.Caspi S. A. Cetin, S.Conceptual Design of the International Axion Observatory (IAXO)activity reportaxion: solarmagnet: superconductivityaxionobservatorysensitivityaxion-like particlessolarMicromegasX-ray: opticsproposed experimentThe International Axion Observatory (IAXO) will be a forthgeneration axion helioscope. As its primary physics goal, IAXO willlook for axions or axion-like particles (ALPs) originating in theSun via the Primakoff conversion of the solar plasma photons. Interms of signal-to-noise ratio, IAXO will be about 4–5 orders ofmagnitude more sensitive than CAST, currently the most powerfulaxion helioscope, reaching sensitivity to axion-photon couplingsdown to a few × 10−12 GeV−1 and thus probing a largefraction of the currently unexplored axion and ALP parameterspace. IAXO will also be sensitive to solar axions produced bymechanisms mediated by the axion-electron coupling gae withsensitivity — for the first time — to values of gae notpreviously excluded by astrophysics. With several other possiblephysics cases, IAXO has the potential to serve as a multi-purposefacility for generic axion and ALP research in the next decade. Inthis paper we present the conceptual design of IAXO, which followsthe layout of an enhanced axion helioscope, based on a purpose-built20 m-long 8-coils toroidal superconducting magnet. All the eight60cm-diameter magnet bores are equipped with focusing x-ray optics,able to focus the signal photons into ~ 0.2 cm2 spots thatare imaged by ultra-low-background Micromegas x-ray detectors. Themagnet is built into a structure with elevation and azimuth drivesthat will allow for solar tracking for ~ 12 h each day.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165616https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00582%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.3233info:eu-repo/grantAgreement/EC//240054
oai:bib-pubdb1.desy.de:1656322021-11-10T11:32:19Zec_fundedresourcesdriverVDBopen_accessopenaireengKrueger, KatjaIntegration concepts for highly granular scintillator-based calorimetersThe Analog Hadron Calorimeter is an option for the hadronic calorimeter of a future linear collider detector, based on scintillator tiles read out by silicon photomultipliers. The high channel density compared to current collider detectors requires an integration of the readout electronics into the active detector layers. The electronics developed by the CALICE Collaboration is very flexible, and its use in the Analog Hadron Calorimeter engineering prototype as well as options for different silicon photomultipliers and different scintillator geometries are discussed.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCalorimetry for the High Energy Frontier, CHEF 2013, Paris, France, 2013-04-22 - 2013-04-252013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165632https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00598%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1656672021-11-10T11:32:28Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKrueger, KatjaIntegration concepts for highly granular scintillator-based calorimetersThe Analog Hadron Calorimeter is an option for the hadronic calorimeter of a future linear collider detector, based on scintillator tiles read out by silicon photomultipliers. The high channel density compared to current collider detectors requires an integration of the readout electronics into the active detector layers. The electronics developed by the CALICE Collaboration is very flexible, and its use in the Analog Hadron Calorimeter engineering prototype as well as options for different silicon photomultipliers and different scintillator geometries are discussed.doi:10.3204/DESY-2014-00633info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of CHEF 2013Proceedings of CHEF 2013<br/>Calorimetry for the High Energy Frontier, CHEF 2013, Paris, France, 2013-04-22 - 2013-04-252013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165667https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00633%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-2-7302-1624-1info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-00633info:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1656732017-02-10T22:13:35Zec_fundedresourcesVDBopenaireengKrueger, KatjaAnalogue HCAL statusinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA 2nd Annual Meeting, Frascati, Italy, 2013-04-10 - 2013-04-122013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165673https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00639%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1657742021-11-10T11:32:48Zec_fundedresourcesdriverVDBopen_accessopenairegerGuenter, ClemensComparison of iron and tungsten absorber structures for the CALICE AHCALinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionFrühjahrstagung der Deutschen Physikalischen Gesellschaft, DPG 2013, Dresden, Germany, 2013-03-04 - 2013-03-082013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165774https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00722%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1657772021-11-10T11:32:49Zec_fundedresourcesdriverVDBopen_accessopenairegerHermberg, BenjaminRealisierung und Test eines technischen Prototypen für ein bildgebendes Hadronkalorimeterinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionFrühjahrstagung der Deutschen Physikalischen Gesellschaft, DPG 2013, Dresden, Germany, 2013-03-04 - 2013-03-082013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165777https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00725%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1657782021-11-10T11:32:49Zec_fundedresourcesdriverVDBopen_accessopenairegerHartbrich, OskarCharakterisierung der Auslese des aktuellen technologischen Prototypen für ein analoges hadronisches Kalorimeterinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionFrühjahrstagung der Deutschen Physikalischen Gesellschaft, DPG 2013, Dresden, Germany, 2013-03-04 - 2013-03-082013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165778https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00726%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1657792017-02-10T22:13:45Zec_fundedresourcesVDBopenaireengHartbrich, OskarScintillator HCAL technological prototype: electronics integrationinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionEuropean Linear Collider Workshop, ECFA LC2013, Hamburg, Germany, 2013-05-27 - 2013-05-312013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165779https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00727%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1657822021-11-10T11:32:49Zec_fundedresourcesdriverVDBopen_accessopenaireengLu, ShaojunScintillator HCAL technological prototype: analysis software and resultsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionEuropean Linear Collider Workshop, ECFA LC2013, Hamburg, Germany, 2013-05-27 - 2013-05-312013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165782https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00730%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1658122017-02-10T22:13:45Zec_fundedresourcesVDBopenaireengReinecke, MathiasPerformance of the Large Scale Prototypes of the CALICE Tile Hadron Calorimeterinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013, Seoul, South Korea, 2013-10-27 - 2013-11-022013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165812https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00760%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1658192017-02-10T22:13:46Zec_fundedresourcesVDBopenaireengHartbrich, OskarA high granularity calorimeter for a future linear colliderinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionLinear Collider Forum 2013, Hamburg, Germany, 2013-10-09 - 2013-10-112013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165819https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00767%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1658202025-07-30T12:37:12Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAliu, E.Archambault, S.Bugaev, V.Böttcher, M.Boisson, C.Bolmont, J.Bordas, P.Brucker, J.Brun, F.Brun, P.Bulik, T.Carrigan, S.Casanova, S.Byrum, K.Cerruti, M.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Cheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cerruti, M.Dalton, M.Daniel, M. K.Davids, I. D.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Domainko, W.Drury, L. O’C.Chen, XuhuiDubus, G.Dutson, K.Dyks, J.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Ciupik, L.Feinstein, F.Fernandes, M. V.Fernandez, D.Fiasson, A.Fontaine, G.Förster, A.Füssling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Connolly, M. P.Giavitto, G.Giebels, B.Glicenstein, J. F.Grondin, M.-H.Grudzińska, M.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Cui, W.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Duke, C.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, M. A.Katarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Dumm, J.Klepser, S.Klochkov, D.Kluźniak, W.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krüger, P. P.Errando, M.Laffon, H.Lamanna, G.Lefaucheur, J.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lennarz, D.Lohse, T.Lopatin, A.Lu, C.-C.Aune, T.Falcone, A.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Maxted, N.Mayer, M.McComb, T. J. L.Méhault, J.Menzler, U.Meyer, M.Federici, S.Moderski, R.Mohamed, M.Moulin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Ohm, S.Feng, Q.de Oña Wilhelmi, E.Opitz, B.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Arribas, M. PazPekeur, N. W.Pelletier, G.Perez, J.Finley, J. P.Petrucci, P.-O.Peyaud, B.Pita, S.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Fortin, P.Reimer, O.Renaud, M.de los Reyes, R.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Fortson, L.Sahakian, V.Sanchez, D. A.Santangelo, A.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Furniss, A.Spengler, G.Spies, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Szostek, A.Tavernet, J.-P.Galante, N.Tavernier, T.Taylor, A. M.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.Vasileiadis, G.Venter, C.Viana, A.Gillanders, G. H.Vincent, P.Völk, H. J.Volpe, F.Vorster, M.Wagner, S. J.Wagner, P.Ward, M.Weidinger, M.Weitzel, Q.White, R.Griffin, S.Wierzcholska, A.Willmann, P.Wörnlein, A.Wouters, D.Zacharias, M.Zajczyk, A.Zdziarski, A. A.Zech, A.Zechlin, H.-S.VERITAS CollaborationBehera, B.Griffiths, S. T.H.E.S.S. CollaborationGrube, J.Gyuk, G.Hanna, D.Holder, J.Hughes, GarethHumensky, T. B.Kaaret, P.Kertzman, M.Khassen, Y.Beilicke, M.Kieda, D.Krawczynski, H.Krennrich, F.Lang, M. J.Madhavan, A. S.Maier, G.Majumdar, P.McCann, A.Moriarty, P.Mukherjee, R.Benbow, W.Nieto, D.de Bhróithe, A. O’FaoláinOng, R. A.Otte, A. N.Park, N.Perkins, J. S.Pohl, MartinPopkow, A.Prokoph, H.Quinn, J.Berger, K.Ragan, K.Rajotte, J.Reyes, L. C.Reynolds, P. T.Richards, G. T.Roache, E.Rousselle, J.Sembroski, G. H.Sheidaei, F.Skole, C.Bird, R.Smith, A. W.Staszak, D.Stroh, M.Telezhinsky, I.Theiling, M.Tucci, J. V.Tyler, J.Varlotta, A.Vincent, S.Wakely, S. P.Bouvier, A.Weinstein, A.Welsing, R.Williams, D. A.Zajczyk, A.Zitzer, B.Abramowski, A.Aharonian, F.Ait Benkhali, F.Akhperjanian, A. G.Angüner, E.Buckley, J. H.Anton, G.Balenderan, S.Balzer, A.Barnacka, A.Becherini, Y.Tjus, J. BeckerBernlöhr, K.Birsin, E.Bissaldi, E.Biteau, J.Long-Term TeV and X-Ray Observations of the Gamma-Ray Binary HESS J0632+057info:eu-repo/classification/ddc/520HESS J0632+057 is the only gamma-ray binary known so far whose position in the sky allows observations with ground-based observatories in both the northern and southern hemispheres. Here we report on long-term observations of HESS J0632+057 conducted with the Very Energetic Radiation Imaging Telescope Array System and High Energy Stereoscopic System Cherenkov telescopes and the X-ray satellite Swift, spanning a time range from 2004 to 2012 and covering most of the system's orbit. The very-high-energy (VHE) emission is found to be variable and is correlated with that at X-ray energies. An orbital period of $315 ^{+6}_{-4}$ days is derived from the X-ray data set, which is compatible with previous results, P = (321 ± 5) days. The VHE light curve shows a distinct maximum at orbital phases close to 0.3, or about 100 days after periastron passage, which coincides with the periodic enhancement of the X-ray emission. Furthermore, the analysis of the TeV data shows for the first time a statistically significant (>6.5σ) detection at orbital phases 0.6-0.9. The obtained gamma-ray and X-ray light curves and the correlation of the source emission at these two energy bands are discussed in the context of the recent ephemeris obtained for the system. Our results are compared to those reported for other gamma-ray binaries.The astrophysical journal / 1 780(168), 1-14 (2014). doi:10.1088/0004-637X/780/2/168info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionUniv.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/165820https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00768%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/wos/WOS:000329097100055info:eu-repo/semantics/altIdentifier/issn/1538-4357info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/780/2/168info:eu-repo/semantics/altIdentifier/issn/0004-637xinfo:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1658222017-02-10T22:13:47Zec_fundedresourcesVDBopenaireengHartbrich, OskarStatus and plans of the CALICE AHCALinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Workshop on Future Linear Colliders, LCWS 2013, Tokyo, Japan, 2013-11-11 - 2013-11-152013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165822https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00770%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1658262017-02-10T22:13:47Zec_fundedresourcesVDBopenaireengEbrahimi, AliakbarElectronics for highly granular scintillator calorimetersinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Workshop on Future Linear Colliders, LCWS 2013, Tokyo, Japan, 2013-11-11 - 2013-11-152013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165826https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00774%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1658282025-07-30T12:37:15Zec_fundedresourcesVDBopenaireengAdloff, C.Blaising, J -JRepond, J.Wing, M.Salvatore, F.Cortina Gil, E.Mannai, S.Baulieu, G.Calabria, P.Caponetto, L.Combaret, C.Della Negra, R.Grenier, G.Schlereth, J.Han, R.Ianigro, J-CKieffer, R.Laktineh, I.Lumb, N.Mathez, H.Mirabito, L.Petrukhin, A.Steen, A.Tromeur, W.Smith, J.Vander Donckt, M.Zoccarato, Y.Calvo Alamillo, E.Fouz, M -CPuerta-Pelayo, J.Corriveau, F.Bobchenko, B.Chadeeva, M.Danilov, M.Epifantsev, A.Xia, L.Markin, O.Mizuk, R.Novikov, E.Popov, V.Rusinov, V.Tarkovsky, E.Kirikova, N.Kozlov, V.Smirnov, P.Soloviev, Y.Baldolemar, E.Besson, D.Buzhan, P.Ilyin, A.Kantserov, V.Kaplin, V.Karakash, A.Popova, E.Tikhomirov, V.Kiesling, C.Seidel, K.Li, J.Simon, F.Soldner, C.Szalay, M.Tesar, M.Weuste, L.Amjad, M. S.Bonis, J.Callier, S.Conforti di Lorenzo, S.Cornebise, P.Park, S. T.Doublet, PhDulucq, F.Fleury, J.Frisson, T.van der Kolk, N.Li, H.Martin-Chassard, G.Richard, F.de la Taille, ChPöschl, R.Sosebee, M.Raux, L.Rouëné, J.Seguin-Moreau, N.Anduze, M.Balagura, V.Boudry, V.Brient, J-CCornat, R.Frotin, M.Gastaldi, F.White, A. P.Guliyev, E.Haddad, Y.Magniette, F.Musat, G.Ruan, M.Tran, T. H.Videau, H.Bulanek, B.Zacek, J.Cvach, J.Yu, J.Gallus, P.Havranek, M.Janata, M.Kvasnicka, J.Lednicky, D.Marcisovsky, M.Polak, I.Popule, J.Tomasek, L.Tomasek, M.Chefdeville, M.Eigen, G.Ruzicka, P.Sicho, P.Smolik, J.Vrba, V.Zalesak, J.Belhorma, B.Ghazlane, H.Kotera, K.Takeshita, T.Uozumi, S.Thomson, M. A.Chang, S.Khan, A.Kim, D. H.Kong, D. J.Oh, Y. D.Götze, M.Sauer, J.Weber, S.Zeitnitz, C.CALICE CollaborationWard, D. R.Benchekroun, D.Hoummada, A.Khoulaki, Y.Apostolakis, J.Dannheim, D.Dotti, A.Elsener, K.Drancourt, C.Folger, G.Grefe, C.Ivantchenko, V.Killenberg, M.Klempt, W.van der Kraaij, E.Lam, C. B.Linssen, L.Lucaci-Timoce, A -IMünnich, A.Gaglione, R.Poss, S.Ribon, A.Sailer, A.Schlatter, D.Strube, J.Uzhinskiy, V.Cârloganu, C.Gay, P.Manen, S.Royer, L.Geffroy, N.Tytgat, M.Zaganidis, N.Blazey, G. C.Dyshkant, A.Lima, J. G. R.Zutshi, V.Hostachy, J -YMorin, L.Cornett, UweDavid, DoerteKaryotakis, Y.Ebrahimi, AliakbarFalley, GertFeege, NilsGadow, KarstenGoettlicher, PeterGuenter, ClemensHartbrich, OskarHermberg, BenjaminKarstensen, S.Krivan, FrantisekKoletsou, I.Krueger, KatjaLu, ShaojunLutz, BenjaminMorozov, S.Morgunov, VasiliyNeubüser, CoralieReinecke, MathiasSefkow, FelixSmirnov, Petr A.Terwort, MarkPrast, J.Garutti, E.Laurien, S.Marchesini, I.Matysek, M.Ramilli, M.Briggl, K.Eckert, P.Harion, T.Schultz-Coulon, H -ChShen, W.Vouters, G.Stamen, R.Bilki, B.Norbeck, E.Northacker, D.Onel, Y.Wilson, G. W.Kawagoe, K.Sudo, Y.Yoshioka, T.Dauncey, P. D.Shower development of particles with momenta from 1 to 10 GeV in the CALICE Scintillator-Tungsten HCALinfo:eu-repo/classification/ddc/610showers: spatial distributionphotomultiplier: silicontungstenscintillation counterCALICEGEANTcalorimeter: hadronicelectron: irradiationpi: irradiationp: irradiationLepton colliders are considered as options to complement and to extend the physics programme at the Large Hadron Collider. The Compact Linear Collider (CLIC) is an e(+)e(−) collider under development aiming at centre-of-mass energies of up to 3 TeV. For experiments at CLIC, a hadron sampling calorimeter with tungsten absorber is proposed. Such a calorimeter provides sufficient depth to contain high-energy showers, while allowing a compact size for the surrounding solenoid. A fine-grained calorimeter prototype with tungsten absorber plates and scintillator tiles read out by silicon photomultipliers was built and exposed to particle beams at CERN. Results obtained with electrons, pions and protons of momenta up to 10 GeV are presented in terms of energy resolution and shower shape studies. The results are compared with several GEANT4 simulation models in order to assess the reliability of the Monte Carlo predictions relevant for a future experiment at CLIC.Journal of Instrumentation 9(01), 1-22 (2014). doi:10.1088/1748-0221/9/01/P01004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst. of Physics2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165828https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00776%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000332307000069info:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/9/01/P01004info:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1658812019-11-14T21:09:30Zec_fundedresourcesVDBopenaireengSefkow, FelixWP 9.5 Granular calorimeter studies infrastructure: Summaryinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA second annual meeting, Frascati, Italy, 2013-04-10 - 2013-04-122013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/165881https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00829%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660122017-02-10T22:14:11Zec_fundedresourcesVDBopenaireengReinecke, MathiasStatus of HBU, EBU and SM_HBU electronicsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE collaboration meeting in Annecy-le-Vieux, Annecy-le-Vieux, France, 2013-09-09 - 2013-09-112013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166012https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00951%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660142017-02-10T22:14:11Zec_fundedresourcesVDBopenaireengEbrahimi, AliakbarAHCAL DAQ Developmentinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE Collaboration Meeting in Annecy-le-Vieux, Annecy-le-Vieux, France, 2013-09-09 - 2013-09-112013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166014https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00953%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660152021-11-10T11:33:22Zec_fundedresourcesdriverVDBopen_accessopenaireengKrueger, KatjaAHCAL prototype overviewinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE collaboration meeting in Annecy-le-Vieux, Annecy-le-Vieux, France, 2013-09-09 - 2013-09-112013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166015https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00954%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660172017-05-16T15:02:50Zec_fundedresourcesVDBopenaireengNeubueser, CoralieSemi-digital Analysis of AHCAL TB data 2010info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE collaboration meeting in Annecy-le-Vieux, Annecy-le-Vieux, France, 2013-09-09 - 2013-09-112013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166017https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00956%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660192019-11-14T21:09:38Zec_fundedresourcesVDBopenaireengLu, ShaojunSoftware for the new scintillator HCAL prototypeinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE Collaboration Meeting in Hamburg, Hamburg, Germany, 2013-03-20 - 2013-03-222013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166019https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00958%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660212017-02-10T22:14:12Zec_fundedresourcesVDBopenaireengReinecke, MathiasStatus of the AHCAL electronics and DAQ developmentsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE Collaboration Meeting in Hamburg, Hamburg, Germany, 2013-03-20 - 2013-03-222013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166021https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00960%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660222017-02-10T22:14:12Zec_fundedresourcesVDBopenaireengHartbrich, OskarOverview of testbeam activities at CERN and DESYinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE Collaboration Meeting in Hamburg, Hamburg, Germany, 2013-03-20 - 2013-03-222013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166022https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00961%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660242021-11-10T11:33:23Zec_fundedresourcesdriverVDBopen_accessopenaireengNeubueser, CoralieDigital analysis of AHCal testbeam datainfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE AHCAL main meeting combined with electronics and DAQ, Hamburg, Germany, 2013-12-09 - 2013-12-102013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166024https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00963%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660252021-11-10T11:33:23Zec_fundedresourcesVDBopenaireengAvetisyan, EduardHCAL optimisation, first cell size studiesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE AHCAL main meeting combined with electronics and DAQ, Hamburg, Germany, 2013-12-09 - 2013-12-102013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166025https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00964%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660262021-11-10T11:33:23Zec_fundedresourcesdriverVDBopen_accessopenaireengHartbrich, OskarMIP fits for testbeam at DESY & CERNinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE AHCAL main meeting combined with electronics and DAQ, Hamburg, Germany, 2013-12-09 - 2013-12-102013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166026https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00965%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660272017-02-10T22:14:12Zec_fundedresourcesVDBopenaireengReinecke, MathiasAHCAL electronicsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE AHCAL main meeting combined with electronics and DAQ, Hamburg, Germany, 2013-12-09 - 2013-12-102013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166027https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00966%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660282021-11-10T11:33:24Zec_fundedresourcesdriverVDBopen_accessopenaireengEbrahimi, AliakbarDAQ status (scintillator)info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALICE AHCAL main meeting combined with electronics and DAQ, Hamburg, Germany, 2013-12-09 - 2013-12-102013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166028https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00967%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1660392021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengLuciano Pappalardo, HERMES CollaborationRecent Hermes results for SSAs and DSAsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionStructure of Nucleons and Nuclei, Como, Italy, 2013-06-10 - 2013-06-142013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166039https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00977%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660402021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengPappalardo, LucianoHERMES CollaborationSelected TMD results from HERMESinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Conference on the Structure of Baryons, Baryons2013, Glasgow, United Kingdom, 2013-06-24 - 2013-06-282013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166040https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00978%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660412021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengPappalardo, LucianoHERMES CollaborationTransverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaonsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Conference on the Structure of Baryons, Baryons2013, Glasgow, United Kingdom, 2013-06-24 - 2013-06-282013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166041https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00979%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660422021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengRostomyan, ArmineHERMES CollaborationHighlights from HERMESinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166042https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00980%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660432021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengRostomyan, ArmineHERMES CollaborationRecent results from HERMESinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion7th Joint International Hadron Structure Conference, HS13, Tatranske Matliare, Slovak Republic, 2013-06-30 - 2013-07-042013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166043https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00981%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660442021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengVan Hulse, CharlotteHERMES CollaborationLatest results from the HERMES experimentinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionThe European Physical Society Conference on High Energy Physics, EPSHEP 2013, Stockholm, Sweden, 2013-07-18 - 2013-07-242013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166044https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00982%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660452021-11-10T11:33:25Zec_fundedresourcesdriverVDBopen_accessopenaireengMarianski, BohdanHERMES CollaborationSpin density Matrix Elements in exclusive production of omega mesons at HERMESinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Nuclear Physics Conference 2013, INPC2013, Florence, Italy, 2013-06-02 - 2013-06-072013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166045https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00983%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660462021-11-10T11:33:26Zec_fundedresourcesdriverVDBopen_accessopenaireengPappalardo, LucianoHERMES CollaborationRecent results on TMDs from the HERMES Experimentinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU2013, Rome, Italy, 2013-09-30 - 2013-10-042013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166046https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00984%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660472021-11-10T11:33:26Zec_fundedresourcesdriverVDBopen_accessopenaireengAugustyniak, WitoldHERMES CollaborationExclusive electroproduction of vector mesons in lepton-nucleon scattering at the HERMES experimentinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion7th Joint International Hadron Structure Conference, HS13, Tatranske Matliare, Slovak Republic, 2013-06-30 - 2013-07-042013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166047https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00985%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660482021-11-10T11:33:26Zec_fundedresourcesdriverVDBopen_accessopenaireengNowak, Wolf-DieterRostomyan, ArmineVan Hulse, CharlotteHERMES CollaborationRecent Results from HERMESinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionXIV Workshop on High-Energy Spin Physics, DSPIN-13, Dubna, Russia, 2013-10-08 - 2013-10-122013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166048https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00986%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660492021-11-10T11:33:26Zec_fundedresourcesdriverVDBopen_accessopenaireengPappalardo, LucianoHERMES CollaborationHERMES news on TMD observablesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion2nd workshop on 'Probing Strangeness in Hard Processes', PSHP2013, Frascati, Italy, 2013-11-11 - 2013-11-132013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166049https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00987%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660502021-11-10T11:33:26Zec_fundedresourcesdriverVDBopen_accessopenaireengRith, KlausHERMES CollaborationHERMES news on $\pi^{pm}$ and $K^{pm}$ multiplicities and S(x)info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion2nd workshop on 'Probing Strangeness in Hard Processes', PSHP2013, Frascati, Italy, 2013-11-11 - 2013-11-132013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166050https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00988%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660512021-11-10T11:33:26Zec_fundedresourcesdriverVDBopen_accessopenaireengVan Hulse, CharlotteHERMES CollaborationRecent results from the HERMES experimentinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion9th Circum-Pan-Pacific Symposium on high energy spin physics, PacSpin2013, Ji'nan, China, 2013-10-28 - 2013-10-312013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166051https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00989%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660652021-11-10T11:33:28Zec_fundedresourcesdriverVDBopen_accessopenaireengZagrebelnyy, VitalyHERMES CollaborationBeam-Spin Asymmetries in SIDIS at HERMESinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Conference on the Structure of Baryons, Baryons2013, Glasgow, United Kingdom, 2013-06-24 - 2013-06-282013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166065https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-00998%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660732021-11-10T11:33:28Zec_fundedresourcesdriverVDBopen_accessopenaireengSchnell, GunarHERMES CollaborationSemi-inclusive DIS off unpolarized targetsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionIndiana-Illinois Workshop on Fragmentation Functions, Bloomington, IN, USA, 2013-12-12 - 2013-12-142013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166073https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01006%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1660742017-02-10T22:14:13Zec_fundedresourcesVDBopenaireengSchnell, GunarExploring the multi-dimensional structure of the nucleoninfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166074https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01007%22Researchersinfo:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1661042025-07-30T12:37:28Zec_fundedresourcesVDBopenaireengMurray, MorganHERMES CollaborationDVCS at HERMESinfo:eu-repo/classification/ddc/530charge: asymmetrydeeply virtual Compton scatteringHERMESspin: asymmetrypositron p: deep inelastic scatteringelectron p: deep inelastic scatteringpolarized target: transverseexperimental resultsDESY HERA Stor27.6 GeVThis talk explores the impact that the Hermes experiment has had regarding knowledge of the Deeply Virtual Compton Scattering process. We discuss the various measurements that Hermes has contributed to the library of DVCS knowledge, with focus in particular on the recent high-precision beam spin and charge asymmetries.Physics of particles and nuclei 45(1), 146 - 147 (2014). doi:10.1134/S1063779614010675info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionThe 20th International Symposium on Spin Physics, SPIN2012, Dubna, Russian Federation, 2012-09-17 - 2012-09-22MAIK Nauka/Interperiodica2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166104https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01036%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1063-7796info:eu-repo/semantics/altIdentifier/wos/WOS:000329311100049info:eu-repo/semantics/altIdentifier/issn/1531-8559info:eu-repo/semantics/altIdentifier/issn/1090-6495info:eu-repo/semantics/altIdentifier/doi/10.1134/S1063779614010675info:eu-repo/grantAgreement/EC//227431
oai:bib-pubdb1.desy.de:1661612025-07-30T12:37:32Zec_fundedresourcesVDBopenaireengBlondé, R.Jimenez-Melero, E.Zhao, L.Schell, N.Brück, E.van der Zwaag, S.van Dijk, N. H.The mechanical stability of retained austenite in low-alloyed TRIP steel under shear loadinginfo:eu-repo/classification/ddc/600Materials science and engineering / A 594, 125 - 134 (2014). doi:10.1016/j.msea.2013.11.001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166161https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01091%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.msea.2013.11.001info:eu-repo/semantics/altIdentifier/issn/1873-4936info:eu-repo/semantics/altIdentifier/wos/WOS:000331677700018info:eu-repo/semantics/altIdentifier/issn/0921-5093info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1662512025-07-30T12:37:39Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAirapetian, AvetikAkopov, N.Bowles, J.Taroian, S.Terkulov, A.Truty, R.Trzcinski, A.Tytgat, M.Haarlem, Y.Van Hulse, CharlotteVikhrov, V.Vilardi, I.Wang, SiguangBrodski, I.Yaschenko, S.Ye, Z.Yen, S.Zagrebelnyy, V.Zihlmann, B.Zupranski, P.HERMES CollaborationBryzgalov, V.Burns, J.Capitani, G. P.Cisbani, E.Ciullo, G.Contalbrigo, M.Dalpiaz, P. F.Deconinck, W.Aschenauer, E. C.Leo, R.Sanctis, E.Diefenthaler, M.Di Nezza, P.Düren, M.Ehrenfried, M.Elbakian, G.Ellinghaus, F.Etzelmüller, E.Fabbri, R.Augustyniak, W.Frullani, S.Gapienko, G.Gapienko, V.Garay Garcia, JasoneGaribaldi, F.Gavrilov, G.Gharibyan, V.Giordano, F.Gliske, S.Hartig, M.Avakian, R.Hasch, D.Holler, Y.Hristova, I.Ivanilov, A.Jackson, H. E.Joosten, S.Kaiser, R.Karyan, G.Keri, T.Kinney, E.Avetissian, A.Kisselev, A.Korotkov, V.Kozlov, V.Kravchenko, P.Krivokhijine, V. G.Lagamba, L.Lapikás, L.Lehmann, I.Lenisa, P.Lorenzon, W.Avetisyan, E.Lu, X.-G.Ma, B.-Q.Mahon, D.Makins, N. C. R.Manaenkov, S. I.Mao, Y.Marianski, B.Marukyan, H.Miller, C. A.Miyachi, Y.Blok, H. P.Movsisyan, A.Muccifora, V.Murray, M.Mussgiller, A.Naryshkin, Y.Nass, A.Negodaev, M.Nowak, W.-D.Pappalardo, L. L.Perez-Benito, R.Böttcher, H.Petrosyan, AnushReimer, P. E.Reolon, A. R.Riedl, C.Rith, K.Rosner, G.Rostomyan, A.Rubin, J.Ryckbosch, D.Salomatin, Y.Borissov, A.Schäfer, A.Schnell, GunarSeitz, B.Shibata, T.-A.Stahl, M.Statera, M.Steffens, E.Steijger, J. J. M.Stewart, J.Stinzing, F.Beam-helicity asymmetry in associated electroproduction of real photons ep $\to e\gamma \pi$N in the $\Delta$-resonance regioninfo:eu-repo/classification/ddc/530positron p: interactiontarget: internaldetector: recoilpolarized beam: longitudinalhelicity: asymmetrypi: electroproductionphoton: associated productionDESY HERA StorDelta(1232)scattering amplitudeHERMESexperimental resultspositron p --> nucleon pi electron photon27.6 GeVThe beam-helicity asymmetry in associated electroproduction of real photons, $ep\to e\gamma \pi N$, in the $\Delta$(1232)-resonance region is measured using the longitudinally polarized HERA positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, $ep\to e\gamma \pi^0 p$ and $ep\to e\gamma \pi^+ n$, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.Journal of high energy physics 2014(1), 77 (2014). doi:10.1007/JHEP01(2014)077info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166251https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01179%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000330171700001info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP01(2014)077info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.5081info:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1664952025-07-30T12:37:33Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAnspoks, A.Kalinko, A.Timoshenko, J.Kuzmin, A.Local structure relaxation in nanosized tungstatesinfo:eu-repo/classification/ddc/540The atomic structure of nanosized and microcrystalline tungstates MeWO4 (Me = Co, Ni, Cu, Zn), synthesized by co-precipitation technique, has been studied by x-ray absorption spectroscopy at the W L3-edge and Co/Ni/Cu/Zn K-edges, x-ray diffraction and Raman spectroscopy. The distortion of metal–oxygen octahedra is caused by the electron–lattice coupling and is further enhanced in nanosized tungstates due to formation of the double tungsten–oxygen bonds at the nanoparticle surface.Solid state communications 183, 22-26 (2014). doi:10.1016/j.ssc.2013.12.028info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166495https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01383%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ssc.2013.12.028info:eu-repo/semantics/altIdentifier/issn/1879-2766info:eu-repo/semantics/altIdentifier/issn/0038-1098info:eu-repo/semantics/altIdentifier/wos/WOS:000332396000005info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1666272025-07-30T12:37:45Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSchulte, TimLofling, J.Achour, A.Mikaelsson, C.Kikhney, A.Hentrich, K.Diamante, A.Ebel, C.Normark, S.Svergun, D.Henriques-Normark, B.The basic keratin 10-binding domain of the virulence-associated pneumococcal serine-rich protein PsrP adopts a novel MSCRAMM foldinfo:eu-repo/classification/ddc/570Streptococcus pneumoniae is a major human pathogen, and a leading cause of disease and death worldwide. Pneumococcal invasive disease is triggered by initial asymptomatic colonization of the human upper respiratory tract. The pneumococcal serine-rich repeat protein (PsrP) is a lung-specific virulence factor whose functional binding region (BR) binds to keratin-10 (KRT10) and promotes pneumococcal biofilm formation through self-oligomerization. We present the crystal structure of the KRT10-binding domain of PsrP (BR187-385) determined to 2.0 A resolution. BR187-385 adopts a novel variant of the DEv-IgG fold, typical for microbial surface components recognizing adhesive matrix molecules adhesins, despite very low sequence identity. An extended beta-sheet on one side of the compressed, two-sided barrel presents a basic groove that possibly binds to the acidic helical rod domain of KRT10. Our study also demonstrates the importance of the other side of the barrel, formed by extensive well-ordered loops and stabilized by short beta-strands, for interaction with KRT10.Open biology 4(1), 130090 (2014). doi:10.1098/rsob.130090info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRoyal Society Publishing2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166627https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01480%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:24430336info:eu-repo/semantics/altIdentifier/issn/2046-2441info:eu-repo/semantics/altIdentifier/doi/10.1098/rsob.130090info:eu-repo/semantics/altIdentifier/wos/WOS:000332387600007info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:1666422025-07-30T12:37:44Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMiertzschke, MandyKoerner, CarolinSpoerner, MichaelWittinghofer, AlfredStructural insights into the small G-protein Arl13B and implications for Joubert syndromeinfo:eu-repo/classification/ddc/540Ciliopathies are human diseases arising from defects in primary or motile cilia. The small G-protein Arl13B (ADP-ribosylation factor-like 13B) localizes to microtubule doublets of the ciliary axoneme and is mutated in Joubert syndrome. Its GDP/GTP mechanistic cycle and the effect of its mutations in patients with Joubert syndrome remain elusive. In the present study we applied high resolution structural and biochemical approaches to study Arl13B. The crystal structure of Chlamydomonas rheinhardtii Arl13B, comprising the G-domain and part of its unique C-terminus, revealed an incomplete active site, and together with biochemical data the present study accounts for the absence of intrinsic GTP hydrolysis by this protein. The structure shows that the residues representing patient mutations R79Q and R200C are involved in stabilizing important intramolecular interactions. Our studies suggest that Arg79 is crucial for the GDP/GTP conformational change by stabilizing the large two-residue register shift typical for Arf (ADP-ribosylation factor) and Arl subfamily proteins. A corresponding mutation in Arl3 induces considerable defects in effector and GAP (GTPase-activating protein) binding, suggesting a loss of Arl13B function in patients with Joubert syndrome.Biochemical journal 457(2), 301 - 311 (2014). doi:10.1042/BJ20131097info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPortland Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/166642https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01495%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:24168557info:eu-repo/semantics/altIdentifier/wos/WOS:000333718000006info:eu-repo/semantics/altIdentifier/issn/0264-6021info:eu-repo/semantics/altIdentifier/issn/0306-3275info:eu-repo/semantics/altIdentifier/issn/1470-8728info:eu-repo/semantics/altIdentifier/doi/10.1042/BJ20131097info:eu-repo/grantAgreement/EC//268782
oai:bib-pubdb1.desy.de:1668832025-07-30T13:23:05Zec_fundedresourcesVDBopenaireengGorbenko, V.Krasnikov, A.Mihokova, E.Nikl, M.Zazubovich, S.Zorenko, Yu.Photoluminescence and excited state structure in $Bi^{3+}$-doped $Lu_{2}SiO_{5}$ single crystalline filmsinfo:eu-repo/classification/ddc/530Single crystalline films of Lu2SiO5:Bi, prepared by the liquid phase epitaxy method from the melt-solution based on Bi2O3 flux, are studied at 4.2–350 K by the time-resolved spectroscopy methods under excitation in the 2.4–6.2 eV energy range. An intense dominant ultraviolet (≈3.5 eV) luminescence of Lu2SiO5:Bi is shown to arise from the radiative decay of the metastable and radiative minima of the triplet relaxed excited state (RES) of Bi3+ centers which are related to the 3P0 and 3P1 levels of a free Bi3+ ion, respectively. At T<50 K, the radiative transitions from the metastable minima mainly take place. Thermally stimulated non-radiative transitions between the metastable and radiative minima of the triplet RES appear at T>50 K in the temperature evolution of the emission spectrum and decay kinetics. The excitation bands of the ultraviolet emission, located at 4.2 eV, 5.03 eV, and 5.95 eV, are assigned to the 1S0→3P1, 1S0→3P2, and 1S0→1P1 transitions of a free Bi3+ ion, respectively. The phenomenological model is proposed to describe the excited-state dynamics of Bi3+ centers in Lu2SiO5:Bi. Characteristic parameters of the triplet RES, in particular the energy separation between the excited states and the rates of the radiative and non-radiative transitions from these states, are determined. Much weaker ≈3.3 eV emission is ascribed to the Bi3+ ions located in the Lu2 lattice sites. Weak broad ≈2.2 eV and ≈2.3 eV emission bands are assumed to arise from the Bi3+-related localized excitons.Journal of luminescence 134, 469–476 (2013). doi:10.1016/j.jlumin.2012.07.043info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/166883https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01681%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1872-7883info:eu-repo/semantics/altIdentifier/wos/WOS:000313393300076info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jlumin.2012.07.043info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1676042025-07-30T13:23:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlioli, S.Fernandez, P.Fuster, J.Irles, A.Moch, S.Uwer, P.Vos, M.A new observable to measure the top-quark mass at hadron collidersinfo:eu-repo/classification/ddc/530The European physical journal / C 73(5), 2438 (2013). doi:10.1140/epjc/s10052-013-2438-2info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/167604https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-01939%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1303.6415info:eu-repo/semantics/altIdentifier/wos/WOS:000319518900023info:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-013-2438-2info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1677432025-07-30T13:23:50Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLu, YeSanthosh Kumar, MatamChiarello, Gian LucaDimopoulos Eggenschwiler, PanayotisBach, ChristianWeilenmann, MartinSpiteri, AlexWeidenkaff, AnkeFerri, DavideOperando XANES study of simulated transient cycles on a Pd-only three-way catalystinfo:eu-repo/classification/ddc/660A model Pd-only three-way catalyst has been subjected to simulated driving conditions of natural gas and gasoline operation in an operando reactor cell for X-ray absorption spectroscopy that included alternated, but longer than real oscillations, rich and lean periods and a high temperature surge (850–900 °C). The X-ray absorption near edge structure (XANES) spectra indicated that metallic palladium is observed in the whole temperature range investigated (up to 900 °C) and irrespective of the air/fuel ratio. In both natural gas and gasoline cycles, the XANES data show that the PdO reduced in the rich periods cannot be restored in the lean periods. With this background, activity for methane abatement in the high temperature regime is greatly affected by the oxidation state of palladium rather than by the change of air/fuel ratio. In the case of propene oxidation, while Pd also remains predominantly in the reduced state, activity is dictated by the oxygen concentration in the feedstock. Comparison between the two hydrocarbons demonstrates that the oxidation state of Pd may be responsible for observed methane emissions under realistic operating circumstances. Moreover, the experiments demonstrate that reduced Pd may be continuously present during operation in agreement with observations on real catalytic converters. Although this may be the average oxidation state of Pd, more advanced probes are certainly necessary to capture variations of oxidation state under the fast oscillatory conditions needed to imitate real operation.Catalysis communications 39, 55 - 59 (2013). doi:10.1016/j.catcom.2013.05.006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2013info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2014-05-14DEhttps://bib-pubdb1.desy.de/record/167743https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02074%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-02074info:eu-repo/semantics/altIdentifier/issn/1873-3905info:eu-repo/semantics/altIdentifier/issn/1566-7367info:eu-repo/semantics/altIdentifier/wos/WOS:000321604300012info:eu-repo/semantics/altIdentifier/doi/10.1016/j.catcom.2013.05.006info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1678732025-07-30T13:24:01Zec_fundedresourcesVDBopenaireengGonnelli, A.Ortore, M. G.Baldassarri, E. J.Spada, G. P.Pieraccini, S.Perone, R. C.Funari, Sergio de SouzaMariani, P.Small-Angle X-ray Scattering Study of Self-Assembling Lipophilic Guanines in Organic Solvents: G-Quadruplex Formation and Cation Effects in Cyclohexaneinfo:eu-repo/classification/ddc/530Lipophilic guanilic derivatives (lipoGs) dissolved in organic solvents can undergo different self-assembly pathways based on different H-bonded motifs, e.g., the cyclic discrete G-quartet, which forms in the presence of alkali-metal ions, and the “infinite” tape-like G-ribbon observed in the absence of ions. Using in-solution small-angle X-ray scattering, we analyzed a series of lipoGs dissolved in cyclohexane in the presence of different salts. The formation of G-quartet based supramolecular aggregates has been confirmed, evidencing the coexistence equilibrium of octamers and noncovalent molecular nanowires (the so-called G-quadruplexes). By global fitting the scattering data, the concentration of the two kinds of particles as well as the nanowire length have been derived as a function of temperature for the different compounds and salts. The thermodynamic parameters show that the self-assembly aggregation process is enthalpy driven, while the observed enthalpy–entropy compensation suggests that similar stacking interactions control the self-assembly of the different compounds. However, the strength of the stacking interactions, and then the nanowire stability, depends on the nature of templating cations and on their capacity to fill the central cavity of quadruplexes, with the order Sr+ < Na+ K+.The journal of physical chemistry <Washington, DC> / B 117(4), 1095 - 1103 (2013). doi:10.1021/jp3121929info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/167873https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02189%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1520-6106info:eu-repo/semantics/altIdentifier/issn/1089-5647info:eu-repo/semantics/altIdentifier/wos/WOS:000314492300014info:eu-repo/semantics/altIdentifier/pmid/pmid:23294474info:eu-repo/semantics/altIdentifier/issn/1520-5207info:eu-repo/semantics/altIdentifier/doi/10.1021/jp3121929info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1678892025-07-17T09:26:03Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGou, HuiyangTsirlin, Alexander A.Liermann, Hanns-PeterDubrovinsky, LeonidDubrovinskaia, NataliaBykova, ElenaAbakumov, Artem M.Van Tendeloo, GustaafRichter, AstaOvsyannikov, Sergey V.Kurnosov, Alexander V.Trots, Dmytro M.Konôpková, ZuzanaPeierls distortion, magnetism, and high hardness of manganese tetraborideinfo:eu-repo/classification/ddc/530We report crystal structure, electronic structure, and magnetism of manganese tetraboride, MnB 4 , synthesized under high-pressure, high-temperature conditions. In contrast to superconducting FeB 4 and metallic CrB 4 , which are both orthorhombic, MnB 4 features a monoclinic crystal structure. Its lower symmetry originates from a Peierls distortion of the Mn chains. This distortion nearly opens the gap at the Fermi level, but despite the strong dimerization and the proximity of MnB 4 to the insulating state, we find indications for a sizable paramagnetic effective moment of about 1.7 μ B /f.u., ferromagnetic spin correlations, and, even more surprisingly, a prominent electronic contribution to the specific heat. However, no magnetic order has been observed in standard thermodynamic measurements down to 2 K. Altogether, this renders MnB 4 a structurally simple but microscopically enigmatic material; we argue that its properties may be influenced by electronic correlations.Physical review / B 89(6), 064108 (2014). doi:10.1103/PhysRevB.89.064108info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/167889https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02202%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0556-2805info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/wos/WOS:000332405000002info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.89.064108info:eu-repo/grantAgreement/EC//246791
oai:bib-pubdb1.desy.de:1679452025-07-30T12:38:39Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengChadwick, H.Brouard, M.Herráez-Aguilar, D.Aoiz, F. J.Chang, Y.-P.Eyles, C. J.McCrudden, G.Perkins, T.Seamons, S. A.Kłos, J.Alexander, M. H.Dagdigian, P. J.The collisional depolarization of OH$(A{}^2\Sigma^+)$ and NO$(A{}^2\Sigma^+)$ with Krinfo:eu-repo/classification/ddc/540Quantum beat spectroscopy has been used to measure rate coefficients at 300 K for collisional depolarization for NO(A (2)Σ(+)) and OH(A (2)Σ(+)) with krypton. Elastic depolarization rate coefficients have also been determined for OH(A) + Kr, and shown to make a much more significant contribution to the total depolarization rate than for NO(A) + Kr. While the experimental data for NO(A) + Kr are in excellent agreement with single surface quasiclassical trajectory (QCT) calculations carried out on the upper 2A(') potential energy surface, the equivalent QCT and quantum mechanical calculations cannot account for the experimental results for OH(A) + Kr collisions, particularly at low N. This disagreement is due to the presence of competing electronic quenching at low N, which requires a multi-surface, non-adiabatic treatment. Somewhat improved agreement with experiment is obtained by means of trajectory surface hopping calculations that include non-adiabatic coupling between the ground 1A(') and excited 2A(') states of OH(X/A) + Kr, although the theoretical depolarization cross sections still significantly overestimate those obtained experimentally.The journal of chemical physics 140(5), 054306 - (2014). doi:10.1063/1.4863446info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Institute of Physics2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/167945https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02247%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000331289200025info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4863446info:eu-repo/semantics/altIdentifier/issn/1089-7690info:eu-repo/semantics/altIdentifier/issn/0021-9606info:eu-repo/semantics/altIdentifier/pmid/pmid:24511939info:eu-repo/grantAgreement/EC//238671
oai:bib-pubdb1.desy.de:1679972021-11-10T11:39:34Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBlümlein, JohannesHasselhuhn, AlexanderPfoh, TorstenThe $O(α\frac{2}{s})$ heavy quark corrections to charged current deep-inelastic scattering at large virtualitiesinfo:eu-repo/classification/ddc/530We calculate the O(α s 2 ) heavy flavor corrections to charged current deep-inelastic scatteringat large scales Q 2m 2 . The contributing Wilson coefficients are given as convolutionsbetween massive operator matrix elements and massless Wilson coefficients. Foregoingresults in the literature are extended and corrected. Numerical results are presented forthe kinematic region of the HERA data.Red Report 41 p. (2013).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/167997https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02281%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.4352info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:1679982025-07-17T09:26:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBlümlein, JohannesHasselhuhn, AlexanderPfoh, TorstenThe $(0\frac{2}{s})$ heavy quark corrections to charged current deep-inelastic scattering at large virtualitiesinfo:eu-repo/classification/ddc/530We calculate the View the MathML sourceO(αs2) heavy flavor corrections to charged current deep-inelastic scattering at large scales Q2≫m2Q2≫m2. The contributing Wilson coefficients are given as convolutions between massive operator matrix elements and massless Wilson coefficients. Foregoing results in the literature are extended and corrected. Numerical results are presented for the kinematic region of the HERA data.Nuclear physics <Amsterdam> / B 881, 1 - 41 (2014). doi:10.1016/j.nuclphysb.2014.01.023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/167998https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02282%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.01.023info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-02282info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/wos/WOS:000334815600001info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.4352info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:1680322025-07-30T12:38:28Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBao, LingMitev, VladimirPomoni, ElliTaki, MasatoYagi, FutoshiNon-Lagrangian theories from brane junctionsinfo:eu-repo/classification/ddc/530gauge field theory: strong couplingfield theory: Todamembrane modelfield theory: conformalpartition functionn-point functioncompactificationdeformationspheresupersymmetry: 1supersymmetry: 2dimension: 5In this article we use 5-brane junctions to study the 5D T_N SCFTs corresponding to the 5D N=1 uplift of the 4D N=2 strongly coupled gauge theories, which are obtained by compactifying N M5 branes on a sphere with three full punctures. Even though these theories have no Lagrangian description, by using the 5-brane junctions proposed by Benini, Benvenuti and Tachikawa, we are able to derive their Seiberg-Witten curves and Nekrasov partition functions. We cross-check our results with the 5D superconformal index proposed by Kim, Kim and Lee. Through the AGTW correspondence, we discuss the relations between 5D superconformal indices and n-point functions of the q-deformed W_N Toda theories.Journal of high energy physics 1401(1), 175 (2014). doi:10.1007/JHEP01(2014)175info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168032https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02298%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000330994000003info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.3841info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP01(2014)175info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1680892021-11-10T11:39:57Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBargheer, TillMinahan, Joseph A.Pereira, RaulComputing Three-Point Functions for Short Operators 2014supersymmetry: 4n-point function: 3operator: primarygauge field theory: Yang-Millschiralstring modeldualityWe compute the three-point structure constants for short primary operators of N=4 super Yang-Mills theory to leading order in the inverse coupling by mapping the problem to a flat-space string theory calculation. We check the validity of our procedure by comparing to known results for three chiral primaries. We then compute the three-point functions for any combination of chiral and non-chiral primaries, with the non-chiral primaries all dual to string states at the first massive level. Along the way we find many cancellations that leave us with simple expressions, suggesting that integrability is playing an important role.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168089https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02333%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1311.7461info:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:1681462025-07-30T12:38:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengPearson, D. G.Brenker, F. E.Vekemans, B.Vincze, L.Nestola, F.McNeill, J.Nasdala, L.Hutchison, M. T.Matveev, S.Mather, K.Silversmit, G.Schmitz, S.Hydrous mantle transition zone indicated by ringwoodite included within diamondinfo:eu-repo/classification/ddc/070The ultimate origin of water in the Earth’s hydrosphere is in the deep Earth—the mantle. Theory1 and experiments2, 3, 4 have shown that although the water storage capacity of olivine-dominated shallow mantle is limited, the Earth’s transition zone, at depths between 410 and 660 kilometres, could be a major repository for water, owing to the ability of the higher-pressure polymorphs of olivine—wadsleyite and ringwoodite—to host enough water to comprise up to around 2.5 per cent of their weight. A hydrous transition zone may have a key role in terrestrial magmatism and plate tectonics5, 6, 7, yet despite experimental demonstration of the water-bearing capacity of these phases, geophysical probes such as electrical conductivity have provided conflicting results8, 9, 10, and the issue of whether the transition zone contains abundant water remains highly controversial11. Here we report X-ray diffraction, Raman and infrared spectroscopic data that provide, to our knowledge, the first evidence for the terrestrial occurrence of any higher-pressure polymorph of olivine: we find ringwoodite included in a diamond from Juína, Brazil. The water-rich nature of this inclusion, indicated by infrared absorption, along with the preservation of the ringwoodite, is direct evidence that, at least locally, the transition zone is hydrous, to about 1 weight per cent. The finding also indicates that some kimberlites must have their primary sources in this deep mantle region.Nature <London> / Physical science 507(7491), 221 - 224 (2014). doi:10.1038/nature13080info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168146https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02382%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1476-4687info:eu-repo/semantics/altIdentifier/issn/0300-8746info:eu-repo/semantics/altIdentifier/doi/10.1038/nature13080info:eu-repo/semantics/altIdentifier/issn/1552-4450info:eu-repo/semantics/altIdentifier/pmid/pmid:24622201info:eu-repo/semantics/altIdentifier/wos/WOS:000332651800036info:eu-repo/grantAgreement/EC//307322
oai:bib-pubdb1.desy.de:1682452025-07-17T09:25:55Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Round, M.Schneider, C.Wissbrock, FabianThe transition matrix element $A_{gq}(N)$ of the variable flavor number scheme at $O(α^3_s)$ info:eu-repo/classification/ddc/530We calculate the massive operator matrix element $A_{gq}^{(3)}(N)$ to 3-loop order in Quantum Chromodynamics at general values of the Mellin variable $N$. This is the first complete transition function needed in the variable flavor number scheme obtained at $O(\alpha_s^3)$. A first independent recalculation is performed for the contributions $\propto N_F$ of the 3-loop anomalous dimension $\gamma_{gq}^{(2)}(N)$.Nuclear physics <Amsterdam> / B 882, 263 - 288 (2014). doi:10.1016/j.nuclphysb.2014.02.007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168245https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02437%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.02.007info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1402.0359info:eu-repo/semantics/altIdentifier/wos/WOS:000335870700011info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1682482021-11-10T11:40:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, JakobBlümlein, JohannesRaab, ClemensSchneider, CarstenWissbrock, FabianCalculating Massive 3-loop Graphs for Operator Matrix Elements by the Method of HyperlogarithmsWe calculate convergent 3-loop Feynman diagrams containing a single massive loop equipped with twist $\tau =2$ local operator insertions corresponding to spin $N$. They contribute to the massive operator matrix elements in QCD describing the massive Wilson coefficients for deep-inelastic scattering at large virtualities. Diagrams of this kind can be computed using an extended version to the method of hyperlogarithms, originally being designed for massless Feynman diagrams without operators. The method is applied to Benz- and $V$-type graphs, belonging to the genuine 3-loop topologies. In case of the $V$-type graphs with five massive propagators new types of nested sums and iterated integrals emerge. The sums are given in terms of finite binomially and inverse binomially weighted generalized cyclotomic sums, while the 1-dimensionally iterated integrals are based on a set of $\sim 30$ square-root valued letters. We also derive the asymptotic representations of the nested sums and present the solution for $N \in \mathbb{C}$. Integrals with a power-like divergence in $N$--space $\propto a^N, a \in \mathbb{R}, a > 1,$ for large values of $N$ emerge. They still possess a representation in $x$--space, which is given in terms of root-valued iterated integrals in the present case. The method of hyperlogarithms is also used to calculate higher moments for crossed box graphs with different operator insertions.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168248https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02440%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.1137info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1682502021-11-10T11:40:49Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Blümlein, J.De Freitas, AbilioHasselhuhn, A.von Manteuffel, A.Round, M.Schneider, C.Wissbrock, FabianThe Transition Matrix Element $A_{gq}(N)$ of the Variable Flavor Number Scheme at $\cal O(\alpha_s^3)$We calculate the massive operator matrix element $A_{gq}^{(3)}(N)$ to 3-loop order in Quantum Chromodynamics at general values of the Mellin variable $N$. This is the first complete transition function needed in the variable flavor number scheme obtained at $O(\alpha_s^3)$. A first independent recalculation is performed for the contributions $\propto N_F$ of the 3-loop anomalous dimension $\gamma_{gq}^{(2)}(N)$.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168250https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02442%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1402.0359info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1683072021-11-10T11:40:54Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBehring, A.Bierenbaum, I.Blümlein, J.De Freitas, A.Klein, S.Wißbrock, F.The Logarithmic Contributions to the O$(\alpha_s^3)$ Asymptotic Massive Wilson Coefficients and Operator Matrix Elements in Deeply Inelastic ScatteringWe calculate the logarithmic contributions to the massive Wilson coefficients for deep-inelastic scattering in the asymptotic region $Q^2 \gg m^2$ to 3-loop order in the fixed-flavor number scheme and present the corresponding expressions for the massive operator matrix elements needed in the variable flavor number scheme. Explicit expressions are given both in Mellin-$N$ space and $z$-space.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168307https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02474%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.6356info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1687152021-11-10T11:41:31Zec_fundedresourcesVDBopenaireengIsachenkov, MikhailKirsch, IngoSchomerus, VolkerChiral Primaries in Strange Metalsalgebra: chiralalgebra: conformalduality: holographysymmetry: conformaldensity: highmetalquantum chromodynamicscoset spacetoy modelinfraredIt was suggested recently that the study of 1-dimensional QCD with fermions in the adjoint representation could lead to an interesting toy model for strange metals and their holographic formulation. In the high density regime, the infrared physics of this theory is described by a constrained free fermion theory with an emergent N=(2,2) superconformal symmetry. In order to narrow the choice of potential holographic duals, we initiate a systematic search for chiral primaries in this model. We argue that the bosonic part of the superconformal algebra can be extended to a coset chiral algebra of the form WN=SO(2N2−2)1/SU(N)2N . In terms of this algebra the spectrum of the low energy theory decomposes into a finite number of sectors which are parametrized by special necklaces. We compute the corresponding characters and partition functions and determine the set of chiral primaries for N≤5 .info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/168715https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02612%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.6857info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1687222025-07-30T12:39:22Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBargheer, TillMinahan, Joseph A.Pereira, RaulComputing three-point functions for short operatorsinfo:eu-repo/classification/ddc/530supersymmetry: 4n-point function: 3operator: primarygauge field theory: Yang-Millschiralstring modeldualityWe compute the three-point structure constants for short primary operators of N=4 super Yang-Mills theory to leading order in the inverse coupling by mapping the problem to a flat-space string theory calculation. We check the validity of our procedure by comparing to known results for three chiral primaries. We then compute the three-point functions for any combination of chiral and non-chiral primaries, with the non-chiral primaries all dual to string states at the first massive level. Along the way we find many cancellations that leave us with simple expressions, suggesting that integrability is playing an important role.Journal of high energy physics 1403(03), 096 (1-35) (2014). doi:10.1007/JHEP03(2014)096info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSeminar, Berlin, GermanySpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168722https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02619%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1311.7461info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP03(2014)096info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/wos/WOS:000347830500001info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-02619info:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:1687252021-11-10T11:41:33Zec_fundedresourcesVDBopenaireengCagnazzo, AlessandraIntegrability and Wilson loops: the wavy line contouroperator: LaxintegrabilityWilson loopperturbation theoryThe Wilson loop with a wavy line contour is studied using integrable methods. The auxiliary problem is solved and the Lax operator is built to first order in perturbation theory, considering a small perturbation from the straight line. Finally the spectral curve of the solution is considered.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/168725https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02622%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.6891info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1687292021-11-10T11:41:33Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuchmuller, WilfriedDomcke, ValerieKamada, KoheiSchmitz, KaiHybrid Inflation in the Complex Planeinflation: hybridsupersymmetry: symmetry breakingscale: grand unified theorysupergravity: correctionfluctuation: primordialrotation: invariancespontaneous symmetry breakingcritical phenomenaboundary conditioncosmological modelpower spectrumperturbationdark mattertrajectoryinflatonentropyF-termSupersymmetric hybrid inflation is an exquisite framework to connect inflationary cosmology to particle physics at the scale of grand unification. Ending in a phase transition associated with spontaneous symmetry breaking, it can naturally explain the generation of entropy, matter and dark matter. Coupling F-term hybrid inflation to soft supersymmetry breaking distorts the rotational invariance in the complex inflaton plane — an important fact, which has been neglected in all previous studies. Based on the δ N formalism, we analyze the cosmological perturbations for the first time in the full two-field model, also taking into account the fast-roll dynamics at and after the end of inflation. As a consequence of the two-field nature of hybrid inflation, the predictions for the primordial fluctuations depend not only on the parameters of the Lagrangian, but are eventually fixed by the choice of the inflationary trajectory. Recognizing hybrid inflation as a two-field model resolves two shortcomings often times attributed to it: the fine-tuning problem of the initial conditions is greatly relaxed and a spectral index in accordance with the PLANCK data can be achieved in a large part of the parameter space without the aid of supergravity corrections. Our analysis can be easily generalized to other (including large-field) scenarios of inflation in which soft supersymmetry breaking transforms an initially single-field model into a multi-field model.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168729https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02626%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1404.1832info:eu-repo/grantAgreement/EC//289442
oai:bib-pubdb1.desy.de:1688062021-11-10T11:41:54Zec_fundedresourcesdriverVDBopen_accessopenaireengZvolsky, MilanEndoTOFPET-US: A Miniaturised Calorimeter for EndoscopicPositron Emission TomographyIn the scope of the EndoTOFPET-US project, a novel multimodal device for Ultrasound (US) Endoscopy and Positron Emission Tomography (PET) is being developed. The project aims at detecting and quantifying morphologic and functional markers and developing new biomarkers for pancreas and prostate oncology. Exploiting the Time-of-Flight (TOF) information of the gamma rays allows for a more sensitive, more precise and lower radiation-dose imaging and intervention on small internal structures.The detection of the gamma rays is realised with the help of scintillator crystals with Silicon Photomultiplier (SiPM) read-out, aiming at a coincidence time resolution of 200 ps and a spatial resolution of $\approx 1$ mm.For the endoscopic detector, digital SiPMs are utilised for the first time in an instrument planned for clinical applications.The functionality of the instrument as well as the challenges that accompany the high miniaturisation of the endoscopic detector and the asymmetric and variable geometry of the system, are presented.The demands on the system involve the fields of scintillating crystallography, ultra-fast photon detection, highly integrated electronics, system integration as well as image reconstruction.\\The single detector components have been fully characterised and are performing up to specifications. Two concurrent ASIC chips have been developed for the project. The first PET images have been acquired with a test setup that consists solely of hardware and software developed within the collaboration and demonstrate that the data acquisition and reconstruction chain is operational. In this talk, the characterisation of the single components and the status of the detector integration and comissioning is presented.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCALOR2014, Giessen, Germany, 2014-04-07 - 2014-04-112014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168806https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02670%22Researchersinfo:eu-repo/grantAgreement/EC//256984
oai:bib-pubdb1.desy.de:1688502025-07-30T12:39:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengTresintsi, SofiaSimeonidis, KonstantinosKatsikini, MariaPaloura, EleniBantsis, GeorgiosMitrakas, ManassisA novel approach for arsenic adsorbents regeneration using MgOinfo:eu-repo/classification/ddc/530An integrated procedure for the regeneration of iron oxy-hydroxide arsenic adsorbents by granulated MgO is proposed in this study. A continuous recirculation configuration, with a NaOH solution flowing sequentially through the saturated adsorbent (leaching step) and the MgO (adsorption step) column beds, was optimized by utilizing the high arsenic adsorption efficiency of MgO at strong alkaline environments. Experimental results indicated that the total amount of leached arsenic was captured by MgO whereas the regenerated iron oxy-hydroxide recovered around 80% of its removal capacity upon reuse. The improved adsorption capacity of MgO for As(V), which is maximized at pH 10, is explained by the intermediate hydration to Mg(OH)2 and the following As(V) oxy-anions adsorption on its surface through the formation of monodentate inner sphere complexes, as it is deduced from the Assingle bondK-edge X-ray absorption fine structure (EXAFS) analysis. In addition to the economical-benefits, corresponding tests proved that the solid wastes of this process, namely spent MgO/Mg(OH)2, can be environmentally safely disposed as stable additives in cement products, while the alkaline solution is completely detoxified and can be recycled to the regeneration task.Journal of hazardous materials 265, 217 - 225 (2014). doi:10.1016/j.jhazmat.2013.12.003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionScience Direct2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168850https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02686%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0304-3894info:eu-repo/semantics/altIdentifier/issn/1873-3336info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jhazmat.2013.12.003info:eu-repo/semantics/altIdentifier/wos/WOS:000331021100025info:eu-repo/semantics/altIdentifier/pmid/pmid:24361801info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1688512025-07-30T12:40:10Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZougrou, Ioanna-MariaKatsikini, M.Pinakidou, F.Papadopoulou, L.Tsoukala, E.Paloura, EleniInfluence of depositional environment in fossil teeth: a micro-XRF and XAFS studyinfo:eu-repo/classification/ddc/530The formation of metal-rich phases during the fossilization of vertebrate fossil teeth, recovered from various deposition environments in northern Greece, is studied by means of synchrotron radiation X-ray fluorescence (SR-XRF) as well as Fe and Mn K edge X-ray absorption fine structure (XAFS) spectroscopy. XRF line-scans from the samples' cross-sections revealed different contamination paths for Mn and Fe. The two-dimensional XRF maps illustrate the spatial distribution of P, Ca, Mn and Fe as well as the precipitation of Fe-rich phases in cementum, dentin and dentinal tubules. Goethite, lepidocrocite and ferrihydrite were detected in the samples' cross-section by means of Fe K edge EXAFS spectroscopy. Moreover the Fe and Mn K edge EXAFS revealed the presence of vivianite and birnessite (MnO2) on the external surface of two samples.Journal of physics / Conference Series 499(1), 012015 (2014). doi:10.1088/1742-6596/499/1/012015info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion22nd International Congress on X-Ray Optics and Microanalysis, ICXOM22, Hamburg, Germany, 2013-09-02 - 2013-09-06IOP Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168851https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02687%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000338041300015info:eu-repo/semantics/altIdentifier/issn/1742-6596info:eu-repo/semantics/altIdentifier/doi/10.1088/1742-6596/499/1/012015info:eu-repo/semantics/altIdentifier/issn/1742-6588info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1689502025-07-30T12:40:25Zec_fundedresourcesVDBdriveropen_accessopenairednbdeliveryengOtrelo-Cardoso, Anada Silva Correia, MárciaSchwuchow, ViolaSvergun, DmitriRomão, MariaLeimkühler, SilkeSantos-Silva, TeresaStructural Data on the Periplasmic Aldehyde Oxidoreductase PaoABC from Escherichia coli: SAXS and Preliminary X-ray Crystallography Analysisinfo:eu-repo/classification/ddc/570The periplasmic aldehyde oxidoreductase PaoABC from Escherichia coli is a molybdenum enzyme involved in detoxification of aldehydes in the cell. It is an example of an αβγ heterotrimeric enzyme of the xanthine oxidase family of enzymes which does not dimerize via its molybdenum cofactor binding domain. In order to structurally characterize PaoABC, X-ray crystallography and small angle X-ray scattering (SAXS) have been carried out. The protein crystallizes in the presence of 20% (w/v) polyethylene glycol 3350 using the hanging-drop vapour diffusion method. Although crystals were initially twinned, several experiments were done to overcome twinning and lowering the crystallization temperature (293 K to 277 K) was the solution to the problem. The non-twinned crystals used to solve the structure diffract X-rays to beyond 1.80 Å and belong to the C2 space group, with cell parameters a = 109.42 Å, b = 78.08 Å, c = 151.77 Å, β = 99.77°, and one molecule in the asymmetric unit. A molecular replacement solution was found for each subunit separately, using several proteins as search models. SAXS data of PaoABC were also collected showing that, in solution, the protein is also an αβγ heterotrimer.International journal of molecular sciences 15(2), 2223 - 2236 (2014). doi:10.3390/ijms15022223info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionMolecular Diversity Preservation International2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168950https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02749%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:24492481info:eu-repo/semantics/altIdentifier/doi/10.3390/ijms15022223info:eu-repo/semantics/altIdentifier/issn/1661-6596info:eu-repo/semantics/altIdentifier/wos/WOS:000335776400032info:eu-repo/semantics/altIdentifier/issn/1422-0067info:eu-repo/grantAgreement/EC//227764info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:1689882022-10-08T19:02:07Zdriverdnbdeliveryec_fundedresourcesopen_accessVDBopenaireengXu, ChenStudy of the Silicon Photomultipliers and Their Applications in Positron Emission TomographyDissertationThis thesis deals with silicon photomultipliers (SiPM) used in scintillation detectors and their applicationsin positron emission tomography (PET). The study of the SiPM is mainly focused on the application to theproposed EndoTOFPET-US detector, which is a multi-modality PET detector facilitating the developmentof new biomarkers for pancreas and prostate cancers.A Monte Carlo simulation tool is developed for the optimization of the detector’s single channel design.In order to obtain a 200 ps system coincidence time resolution and maximize the detector sensitivity, therequirements for the crystal geometry, light yield and SiPM photon detection efficiency are specifiedbased on the simulation study. In addition, the nonlinear response of the SiPM can be corrected by thesimulation tool and the energy resolution of the detector is extracted.A series of measurements are established to characterize SiPMs in a fast and reliable way with highprecision. The static characterization measures the value of different components in the derived electricalmodel of the SiPM, whereas the dynamic characterization extracts parameters that is crucial for theoperation of the SiPM. Several SiPM samples are tested and their characteristics are compared. Thedeveloped setup and the precision of the measurement fulfill the requirements of the quality assurance testfor the commissioning of the EndoTOFPET-US detector. The test foresees large quantities of SiPMs tobe characterized. In addition, the developed measuring procedure has contributed to the study of X-rayinduced surface damage of a SiPM from Hamamatsu. Characteristics of the device are measured beforeand after irradiating the SiPM with different X-ray doses, the results are compared and discussed.A comparative study of a digital and an analog SiPM in gamma spectroscopy with the inorganic scintil-lator is presented. The characteristics of a prototype digital SiPM that is developed for the EndoTOFPET-US detector is measured and compared to an analog SiPM with similar form factor. Its non linear responseto scintillation light is corrected by the simulation tool and the energy resolution is extracted. The workvalidates the digital SiPM to be a viable solution for the EndoTOFPET-US detector.Hamburg 119 pp. (2014). doi:10.3204/DESY-2014-02771 = Dissertation, University of Hamburg, 2014info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168988https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02771%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-02771info:eu-repo/grantAgreement/EC//256984
oai:bib-pubdb1.desy.de:1689902025-07-30T12:40:20Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKhatim, O.Nguyen, T. H. N.Amamra, M.Museur, L.Khodan, A.Kanaev, A.Synthesis and photoluminescence properties of nanostructured mullite/α- $Al_2O_3$info:eu-repo/classification/ddc/670Phase transformation of α-Al2O3 to mullite was observed by correlated X-ray diffraction and low-temperature (7 K) time- and energy-resolved photoluminescence methods. The aluminosilicate solids with different Si:Al ratios were prepared after thermal treatment (1400 °C) of ultraporous alumina (UPA) monoliths impregnated with vapour of silica precursors at room temperature. The initial dispersion of Si is homogeneous on a size-scale of 5 nm raw UPA fibres, which grow in size during the thermal treatment stage up to ∼50–100 nm. Three phases were resolved in the considered SiO2/Al2O3 system: silica, α-Al2O3 and their interaction product 2:1 mullite (2Al2O3:SiO2). The 2:1 mullite mass increases and α-Al2O3 mass decreases with an increase of the initial silica content. At the SiO2 content in the initial system above 20 mol.%, the phase transformation to 2:1 mullite is complete and no α-Al2O3 was observed. No mullite phases with either lower or higher Si content were observed. The fundamental absorption onset energy 7.55 eV of 2:1 mullite was measured.Acta materialia 71, 108 - 116 (2014). doi:10.1016/j.actamat.2014.03.006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/168990https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02773%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2014.03.006info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/wos/WOS:000336695100011info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1689912025-07-30T12:40:23Zec_fundedresourcesVDBopenaireengMa, C.-G.Popov, AlexandrVanetsev, A. S.Gaitko, O. M.Orlovskaya, E. O.Lange, S.Sildos, I.Orlovskii, Yu. V.Vacuum ultraviolet spectroscopic analysis of $Ce^3+$-doped hexagonal $YPO_4·0.8H_2O$ based on exchange charge modelinfo:eu-repo/classification/ddc/530The hexagonal YPO4·0.8H2O:Ce3+ nanophosphors are successfully prepared by the microwave–hydrothermal technique for the first time. The 4f–5d excitation spectrum of Ce3+ ion in the synthesized samples is recorded at 10 K using synchrotron radiation after the crystalline phase structure was confirmed by the X-ray diffraction(XRD) analysis. The combination of the effective Hamiltonian model for 5d1 configuration of Ce3+ ions and the exchange charge model of crystal-field (CF) theory is employed to analyze both the present electronic spectra measured by us and the case of the tetragonal crystalline powder sample of YPO4:Ce3+ reported by van Pieterson et al. (Phys. Rev. B: Condens. Matter. 65 (2002) 045113). The calculated 5d electronic energy levels of Ce3+ ions doped in two crystalline phases are in good agreement with the experimental results. The obtained CF strength parameters for both the cases suggest that Ce3+ ions in the hexagonal phase experience a stronger CF effect. In addition, the expansion technique of CF Hamiltonian along the chosen point-group chain is proposed to qualitatively understand the relationship between the local structure around Ce3+ impurities and the observed 5d energy splitting pattern for two cases.Journal of luminescence 152, 70 - 74 (2014). doi:10.1016/j.jlumin.2013.10.069info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/168991https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02774%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0022-2313info:eu-repo/semantics/altIdentifier/issn/1872-7883info:eu-repo/semantics/altIdentifier/wos/WOS:000337017800017info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jlumin.2013.10.069info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1690882025-07-17T09:25:31Zec_fundedresourcesVDBdriveropen_accessopenairednbdeliveryengArmengaud, E.Avignone, F. T.Cetin, S. A.Chelouche, D.Christensen, F. E.Dael, A.Dafni, T.Davenport, M.Derbin, A. V.Desch, K.Diago, A.Döbrich, B.Betz, M.Dratchnev, I.Dudarev, A.Eleftheriadis, C.Fanourakis, G.Ferrer-Ribas, E.Galán, J.García, J. A.Garza, J. G.Geralis, T.Gimeno, B.Brax, P.Giomataris, I.Gninenko, S.Gómez, H.González-Díaz, D.Guendelman, E.Hailey, C. J.Hiramatsu, T.Hoffmann, D. H. H.Horns, D.Iguaz, F. J.Brun, P.Irastorza, I. G.Isern, J.Imai, K.Jakobsen, A. C.Jaeckel, J.Jakovčić, K.Kaminski, J.Kawasaki, M.Karuza, M.Krčmar, M.Cantatore, G.Kousouris, K.Krieger, C.Lakić, B.Limousin, O.Lindner, A.Liolios, A.Luzón, G.Matsuki, S.Muratova, V. N.Nones, C.Carmona, J. M.Ortega, I.Papaevangelou, T.Pivovaroff, M. J.Raffelt, G.Redondo, J.Ringwald, A.Russenschuck, S.Ruz, J.Saikawa, K.Savvidis, I.Carosi, G. P.Sekiguchi, T.Semertzidis, Y. K.Shilon, I.Sikivie, P.Silva, H.Kate, H tenTomas, A.Troitsky, S.Vafeiadis, T.Bibber, K vanCaspers, F.Vedrine, P.Villar, J. A.Vogel, J. K.Walckiers, L.Weltman, A.Wester, W.Yildiz, S. C.Zioutas, K.Caspi, S.Conceptual design of the International Axion Observatory (IAXO)info:eu-repo/classification/ddc/610activity reportaxion: solarmagnet: superconductivityaxionobservatorysensitivityaxion-like particlessolarMicromegasX-ray: opticsproposed experimentThe International Axion Observatory (IAXO) will be a forthgeneration axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) originating in theSun via the Primakoff conversion of the solar plasma photons. Interms of signal-to-noise ratio, IAXO will be about 4–5 orders ofmagnitude more sensitive than CAST, currently the most powerfulaxion helioscope, reaching sensitivity to axion-photon couplingsdown to a few × 10−12 GeV−1 and thus probing a largefraction of the currently unexplored axion and ALP parameterspace. IAXO will also be sensitive to solar axions produced bymechanisms mediated by the axion-electron coupling gae withsensitivity — for the first time — to values of gae notpreviously excluded by astrophysics. With several other possiblephysics cases, IAXO has the potential to serve as a multi-purposefacility for generic axion and ALP research in the next decade. Inthis paper we present the conceptual design of IAXO, which followsthe layout of an enhanced axion helioscope, based on a purpose-built20 m-long 8-coils toroidal superconducting magnet. All the eight60cm-diameter magnet bores are equipped with focusing x-ray optics,able to focus the signal photons into ~ 0.2 cm2 spots thatare imaged by ultra-low-background Micromegas x-ray detectors. Themagnet is built into a structure with elevation and azimuth drivesthat will allow for solar tracking for ~ 12 h each day.Journal of Instrumentation 9(05), T05002 (2014). doi:10.1088/1748-0221/9/05/T05002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst. of Physics2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/169088https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02782%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/9/05/T05002info:eu-repo/semantics/altIdentifier/wos/WOS:000340036100077info:eu-repo/grantAgreement/EC//240054
oai:bib-pubdb1.desy.de:1691272021-11-10T11:42:21Zec_fundedresourcesVDBopenaireengHerpers, AnjaLenser, ChristianPark, ChanwooOffi, FrancescoBorgatti, FrancescoPanaccione, GiancarloMenzel, StephanWaser, RainerDittmann, ReginaSpectroscopic Proof of the Correlation between Redox-State and Charge-Carrier Transport at the Interface of Resistively Switching Ti/PCMO Devicesinfo:eu-repo/classification/ddc/540By using hard X-ray photoelectron spectroscopy experimentally, proof is provided that resistive switching in Ti/Pr0.48Ca0.52MnO3 (PCMO) devices is based on a redox-process that mainly occurs on the Ti-side. The different resistance states are determined by the amount of fully oxidized Ti-ions in the stack, implying a reversible redox-reaction at the interface, which governs the formation and shortening of an insulating tunnel barrier.Advanced materials 26(17), 2730 - 2735 (2014). doi:10.1002/adma.201304054info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/169127https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02809%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1521-4095info:eu-repo/semantics/altIdentifier/doi/10.1002/adma.201304054info:eu-repo/semantics/altIdentifier/pmid/pmid:24706476info:eu-repo/semantics/altIdentifier/wos/WOS:000335401100018info:eu-repo/semantics/altIdentifier/issn/0935-9648info:eu-repo/grantAgreement/EC//246102
oai:bib-pubdb1.desy.de:1692422025-07-17T09:27:02Zdnbdeliverydriveropen_accessopenaireVDBec_fundedresourcesengVartiainen, IsmoWarmer, MartinGoeries, DennisHerker, EvaReimer, RudolphDavid, ChristianMeents, AlkeTowards tender X-rays with Zernike phase-contrast imaging of biological samples at 50 nm resolutioninfo:eu-repo/classification/ddc/540X-ray microscopy is a commonly used method especially in material scienceapplication, where the large penetration depth of X-rays is necessary for three-dimensional structural studies of thick specimens with high-Z elements. In thispaper it is shown that full-field X-ray microscopy at 6.2 keV can be utilized forimaging of biological specimens with high resolution. A full-field Zernike phase-contrast microscope based on diffractive optics is used to study lipid dropletformation in hepatoma cells. It is shown that the contrast of the images iscomparable with that of electron microscopy, and even better contrast at tenderX-ray energies between 2.5 keV and 4 keV is expected.Journal of synchrotron radiation 21(4), 790 - 794 (2014). doi:10.1107/S1600577514010388info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIUCr2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/169242https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02869%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1600-5775info:eu-repo/semantics/altIdentifier/issn/0909-0495info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600577514010388info:eu-repo/semantics/altIdentifier/wos/WOS:000338124300020info:eu-repo/semantics/altIdentifier/pmid/pmid:24971976info:eu-repo/grantAgreement/EC//290605
oai:bib-pubdb1.desy.de:1693012025-07-30T12:41:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBlondé, RomainJimenez-Melero, EnriquePonnusami, Sathiskumar A.Zhao, LieSchell, NorbertBrück, Ekkesvan der Zwaag, Sybrandvan Dijk, NielsPosition-dependent shear-induced austenite–martensite transformation in double-notched TRIP and dual-phase steel samplesinfo:eu-repo/classification/ddc/540While earlier studies on transformation-induced-plasticity (TRIP) steels focusedon the determination of the austenite-to-martensite decomposition in uniformdeformation or thermal fields, the current research focuses on the determinationof the local retained austenite-to-martensite transformation behaviour in aninhomogeneous yet carefully controlled shear-loaded region of double-notchedTRIP and dual-phase (DP) steel samples. A detailed powder analysis has beenperformed to simultaneously monitor the evolution of the phase fraction and thechanges in average carbon concentration of metastable austenite together withthe local strain components in the constituent phases as a function of themacroscopic stress and location with respect to the shear band. The metastableretained austenite shows a mechanically induced martensitic transformation inthe localized shear zone, which is accompanied by an increase in average carbonconcentration of the remaining austenite due to a preferred transformation ofthe austenite grains with the lowest carbon concentration. At the laterdeformation stages the geometry of the shear test samples results in thedevelopment of an additional tensile component. The experimental strain fieldwithin the probed sample area is in good agreement with finite elementcalculations. The strain development observed in the low-alloyed TRIP steelwith metastable austenite is compared with that of steels with the same chemicalcomposition containing either no austenite (a DP grade) or stable retainedaustenite (a TRIP grade produced at a long bainitic holding time). Thetransformation of metastable austenite under shear is a complex interplaybetween the local microstructure and the evolving strain fields.Journal of applied crystallography 47(3), 956 - 964 (2014). doi:10.1107/S1600576714006712info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionMunksgaard2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/169301https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02887%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1600-5767info:eu-repo/semantics/altIdentifier/issn/0021-8898info:eu-repo/semantics/altIdentifier/wos/WOS:000336738500015info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600576714006712info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1699552025-07-30T12:41:55Zec_fundedresourcesVDBopenaireengZekiri, FlorimeBijelic, AleksandarMolitor, ChristianRompel, AnnetteCrystallization and preliminary X-ray crystallographic analysis of polyphenol oxidase from Juglans regia (jr PPO1)info:eu-repo/classification/ddc/530Tyrosinase is a type 3 copper enzyme that catalyzes the ortho-hydroxylation of monophenols to diphenols as well as their subsequent oxidation to quinones, which are precursors for the biosynthesis of melanins. The first plant tyrosinase from walnut leaves (Juglans regia) was purified to homogeneity and crystallized. During the purification, two forms of the enzyme differing only in their C-termini [jrPPO1(Asp101-Pro444) and jrPPO1(Asp101-Arg445)] were obtained. The most abundant form jrPPO1(Asp101-Arg445), as described in Zekiri et al. [Phytochemistry (2014), 101, 5-15], was crystallized, resulting in crystals that belonged to space group C121, with unit-cell parameters a = 115.56, b = 91.90, c = 86.87 Å, [alpha] = 90, [beta] = 130.186, [gamma] = 90°, and diffracted to 2.39 Å resolution. Crystals were only obtained from solutions containing at least 30% polyethylene glycol 5000 monomethyl ether in a close-to-neutral pH range.Acta crystallographica / F 70(6), 832–834 (2014). doi:10.1107/S2053230X1400884Xinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionBlackwell2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/169955https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-02954%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000337062500031info:eu-repo/semantics/altIdentifier/issn/1744-3091info:eu-repo/semantics/altIdentifier/doi/10.1107/S2053230X1400884Xinfo:eu-repo/semantics/altIdentifier/pmid/pmid:24915104info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:1700942020-10-27T16:22:49Zec_fundedresourcesVDBopenaireengBartels, J.Schomerus, V.Sprenger, M.Heptagon Amplitude in the Multi-Regge Regimesupersymmetry: 4kinematics: multi-Reggestrong couplingintegrabilityscatteringinfraredstringAdS(5) x S(5)gluonReggeBethe ansatzWe describe a general algorithm for the computation of the remainder function for n-gluon scattering in multi-Regge kinematics for strongly coupled planar N=4 super Yang-Mills theory. This regime is accessible through the infrared physics of an auxiliary quantum integrable system describing strings in AdS5xS5. Explicit formulas are presented for n=6 and n=7 external gluons. Our results are consistent with expectations from perturbative gauge theory. This paper comprises the technical details for the results announced in arXiv:1405.3658 .info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/170094https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03009%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.3658info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1701802021-11-10T11:43:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Round, M.Schneider, Claus M.Wißbrock, F.3-Loop Heavy Flavor Corrections in Deep-Inelastic Scattering with Two Heavy Quark LinesWe consider gluonic contributions to the heavy flavor Wilson coefficients at 3-loop order in QCD with two heavy quark lines in the asymptotic region $Q^2 \gg m_{1(2)}^2$. Here we report on the complete result in the case of two equal masses $m_1 = m_2$ for the massive operator matrix element $A_{gg,Q}^{(3)}$, which contributes to the corresponding heavy flavor transition matrix element in the variable flavor number scheme. Nested finite binomial sums and iterated integrals over square-root valued alphabets emerge in the result for this quantity in $N$ and $x$-space, respectively. We also present results for the case of two unequal masses for the flavor non-singlet OMEs and on the scalar integrals ic case of $A_{gg,Q}^{(3)}$, which were calculated without a further approximation. The graphs can be expressed by finite nested binomial sums over generalized harmonic sums, the alphabet of which contains rational letters in the ratio $\eta = m_1^2/m_2^2$.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/170180https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03018%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.2821info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1701992025-07-30T12:42:15Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAssmann, RalphBehrens, ChristopherKaertner, FranzMarchetti, BarbaraNie, YuancunRuehl, AxelSchlarb, HolgerSchmidt, BernhardStephan, FrankGruener, FlorianHidding, BernhardZeitler, BennoBrinkmann, ReinhardMaier, AndreasSchuh, M.Dorda, UlrichFloettmann, KlausFoster, BrianGrebenyuk, JuliaGross, MatthiasHartl, IngmarHuening, MarkusSINBAD - a proposal for a dedicated accelerator research facility at DESYAccelerator Physics03 Particle Sources and Alternative Acceleration TechniquesA16 Advanced ConceptsA dedicated accelerator research and development facility SINBAD (Short INnovative Bunches and Accelerators atDESY) is proposed. This multi-purpose research facility is initially aimed at promoting three major goals: (1) Shortelectron bunches for ultra-fast science. (2) Construction of a plasma accelerator module with useable beam quality(3) Setup of an attosecond radiation source with advanced technology. Research and development on these topics ispresently ongoing at various places at DESY, as add-on experiments at operational facilities. The two research goalsare intimately connected: short bunches and precise femtosecond timing are requirements for developing a plasmaaccelerator module with external injection or staging. The scientific case of a dedicated facility for accelerator researchat DESY is discussed. Further options are mentioned, like the use of a 1 GeV beam from Linac II for FEL studies. Thepresently planned conversion of the DORIS accelerator and its central halls into the SINBAD facility is described. Theavailable space will allow setting up several independent experiments with a cost-effective use of the same infrastructure(for example a central high power laser, a central timing and synchronization lab, etc.). National and international contributions and proposals can be envisaged. A preliminary, possible layout and the design work plan are discussed.Geneva : JACoW, Geneva, Switzerland 1466-1469 (2014). doi:10.18429/JACoW-IPAC2014-TUPME047info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of IPAC2014, Dresden, GermanyProceedings of IPAC2014, Dresden, Germany<br/><a href="https://inspirehep.net/conferences?start_date=all&q=cnum:%22C14-06-16%22">5th International Particle Accelerator Conference</a>, IPAC 2014, Dresden, Germany, 2014-06-15 - 2014-06-20JACoW, Geneva, Switzerland2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/170199https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03023%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-3-95450-132-8info:eu-repo/semantics/altIdentifier/doi/10.18429/JACoW-IPAC2014-TUPME047info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:1702002021-11-10T11:43:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, AndreasRound, M.Schneider, C.The $O(\alpha_s^3 T_F^2)$ contributions to the gluonic operator matrix elementinfo:eu-repo/classification/ddc/530The $O(\alpha_s^3 T_F^2 C_F (C_A))$ contributions to the transition matrix element $A_{gg,Q}$ relevant for the variable flavor number scheme at 3--loop order are calculated. The corresponding graphs contain two massive fermion lines of equal mass leading to terms given by inverse binomially weighted sums beyond the usual harmonic sums. In $x$-space two root-valued letters contribute in the iterated integrals in addition to those forming the harmonic polylogarithms. We outline technical details needed in the calculation of graphs of this type, which are as well of importance in the case of two different internal massive lines.Amsterdam : North-Holland Publ. Co. (2014). doi:10.3204/DESY-2014-03024info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/170200https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03024%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.4259info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-03024info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:1702052025-07-30T12:42:07Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAirapetian, AvetikAkopov, N.Bryzgalov, V.Truty, R.Trzcinski, A.Tytgat, M.Van Haarlem, Y.Van Hulse, C.Veretennikov, D.Vikhrov, V.Vilardi, I.Vogel, C.Wang, SiguangBurns, J.Yaschenko, S.Ye, Z.Yen, S.Zihlmann, B.Zupranski, P.HERMES CollaborationCapiluppi, M.Capitani, G. P.Cisbani, E.Ciullo, G.Contalbrigo, M.Dalpiaz, P. F.Deconinck, W.De Leo, R.Akopov, Z.De Sanctis, E.Diefenthaler, M.Di Nezza, P.Duren, M.Ehrenfried, M.Elbakian, G.Ellinghaus, F.Etzelmuller, E.Felawka, L.Frullani, S.Aschenauer, E. C.Gabbert, D.Gapienko, G.Gapienko, V.Garay Garcia, JasoneGaribaldi, F.Gavrilov, G.Gharibyan, V.Giordano, F.Gliske, S.Hartig, M.Augustyniak, W.Hasch, D.Hoek, M.Holler, Y.Hristova, I.Ivanilov, A.Jackson, H. E.Joosten, S.Kaiser, R.Karyan, G.Keri, T.Avetissian, A.Kinney, E.Kisselev, A.Korotkov, V.Kozlov, V.Kravchenko, P.Krivokhijine, V. G.Lagamba, L.Lapikas, L.Lehmann, I.Lenisa, P.Avetisyan, E.Lorenzon, W.Lu, X. G.Ma, B. Q.Mahon, D.Manaenkov, S. I.Mao, Y.Marianski, B.Marukyan, H.Miyachi, Y.Movsisyan, A.Belostotski, S.Muccifora, V.Murray, M.Mussgiller, A.Naryshkin, Y.Nass, A.Negodaev, M.Nowak, W. D.Pappalardo, L. L.Perez-Benito, R.Petrosyan, AnushBlok, H. P.Reimer, P. E.Reolon, A. R.Riedl, C.Rith, K.Rosner, G.Rostomyan, A.Rubin, J.Ryckbosch, D.Salomatin, Y.Schafer, A.Borissov, A.Schnell, G.Seitz, B.Shibata, T. A.Stahl, M.Statera, M.Steffens, E.Steijger, J. J. M.Stinzing, F.Taroian, S.Terkulov, A.Reevaluation of the parton distribution of strange quarks in the nucleoninfo:eu-repo/classification/ddc/530parton: distribution functiondeep inelastic scattering: semi-inclusive reactionnucleon: strangenessK: multiplicityHERMESstrangeness: seaelectron deuteron: deep inelastic scatteringx-dependenceDESY HERA StorAn earlier extraction from the HERMES experiment of the polarization-averaged parton distribution of strange quarks in the nucleon has been reevaluated using final data on the multiplicities of charged kaons in semi-inclusive deep-inelastic scattering obtained with a kinematically more comprehensive method of correcting for experimental effects. General features of the distribution are confirmed, but the rise at low $x$ is less pronounced than previously reported.Physical review / D 89(9), 097101 (2014). doi:10.1103/PhysRevD.89.097101info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Physical Society2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/170205https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03029%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.7028info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.89.097101info:eu-repo/grantAgreement/EC//283286
oai:bib-pubdb1.desy.de:1703942025-07-30T12:42:39Zec_fundedresourcesVDBopenaireengAbicht, F.Braenzel, J.Priebe, GerdKoschitzki, Ch.Andreev, A. A.Nickles, P. V.Sandner, WolfgangSchnürer, M.Tracing ultrafast dynamics of strong fields at plasma-vacuum interfaces with longitudinal proton probinginfo:eu-repo/classification/ddc/530If regions of localized strong fields at plasma-vacuum interfaces are probed longitudinally with laser accelerated proton beams their velocity distribution changes sensitively and very fast. Its measured variations provide indirectly a higher temporal resolution as deduced from deflection geometries which rely on the explicit temporal resolution of the proton beam at the position of the object to probe. With help of reasonable models and comparative measurements changes of proton velocity can trace the field dynamics even at femtosecond time scale. In longitudinal probing, the very low longitudinal emittance together with a broad band kinetic energy distribution of laser accelerated protons is the essential prerequisite of the method. With a combination of energy and one-dimensional spatial resolution, we resolve fast field changes down to 100 fs. The used pump probe setup extends previous schemes and allows discriminating simultaneously between electric and magnetic fields in their temporal evolution.Applied physics letters 105(3), 034101 (2014). doi:10.1063/1.4891167info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Institute of Physics2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/170394https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03057%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4891167info:eu-repo/semantics/altIdentifier/wos/WOS:000341152300108info:eu-repo/semantics/altIdentifier/issn/0003-6951info:eu-repo/semantics/altIdentifier/issn/1077-3118info:eu-repo/grantAgreement/EC//284464
oai:bib-pubdb1.desy.de:1709052025-07-17T09:26:49Zec_fundedresourcesVDBopenaireengJóvári, PálLucas, PierreYang, ZhiyongBureau, BrunoKaban, IvanBeuneu, BrigitteBednarčik, JozefShort-Range Order in Ge-As-Te Glassesinfo:eu-repo/classification/ddc/660The structure of Te-rich (75–80 at.% Te) and Te-poor (40 at.% Te) Ge–As–Te glasses has been investigated by diffraction and extended X-ray absorption fine structure (EXAFS) measurements. Large-scale structural models have been created by fitting simultaneously diffraction and EXAFS datasets by the reverse Monte Carlo simulation technique. It is found that As–As bonds improve the fit quality in the case of Te-rich glasses while no Ge–Ge bonding is necessary in these compositions. In the Te-poor glasses, Te–Te homopolar bonds are also observed while Ge binds preferentially to Te rather than to As. Ge–As and Ge–Te coordination numbers do not change significantly with increasing Ge content.Journal of the American Ceramic Society 97(5), 1625 - 1632 (2014). doi:10.1111/jace.12823info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-Blackwell2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/170905https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03071%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1111/jace.12823info:eu-repo/semantics/altIdentifier/issn/0002-7820info:eu-repo/semantics/altIdentifier/wos/WOS:000335809400046info:eu-repo/semantics/altIdentifier/issn/1551-2916info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1711492021-11-10T11:44:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBruno, MattiaSchaefer, StefanSommer, RainerTopological susceptibility and the sampling of field space in $N_f=2$ lattice QCD simulationsarXiv We present a measurement of the topological susceptibility in two flavor QCD. In this observable, large autocorrelations are present and also sizable cutoff effects have to be faced in the continuum extrapolation. Within the statistical accuracy of the computation, the result agrees with the expectation from leading order chiral perturbation theory.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171149https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03172%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.5363info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:1711512025-07-30T12:42:54Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, JochenKormilitzin, AndreyLipatov, LevAnalytic structure of the $n=7$ scattering amplitude in $\mathcal{N}=4$ SYM theory at multi-Regge kinematics: Conformal Regge pole contributioninfo:eu-repo/classification/ddc/530We investigate the analytic structure of the $2\to5$ scattering amplitude in the planar limit of $\mathcal{N}=4$ SYM in multi-Regge kinematics in all physical regions. We demonstrate the close connection between Regge pole and Regge cut contributions: in a selected class of kinematic regions (Mandelstam regions) the usual factorizing Regge pole formula develops unphysical singularities which have to be absorbed and compensated by Regge cut contributions. This leads, in the corrections to the BDS formula, to conformal invariant 'renormalized' Regge pole expressions in the remainder function. We compute these renormalized Regge poles for the $2\to5$ scattering amplitude. arXivPhysical review / D 89(6), 065002 (2014). doi:10.1103/PhysRevD.89.065002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171151https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03174%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-03174info:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.89.065002info:eu-repo/semantics/altIdentifier/wos/WOS:000333107200020info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1711742025-07-30T12:43:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengVogt, A.Moch, Sven-OlafVermaseren, J. A. M.A calculation of the three-loop helicity-dependent splitting functions in QCDinfo:eu-repo/classification/ddc/530We have calculated the complete matrix of three-loop helicity-difference (`polarized') splitting functions Delta P_ik^(2), i,k = q,g, in massless perturbative QCD. In this note we briefly discuss some properties of the polarized splitting functions and our non-standard determination of the hitherto missing lower-row quantities Delta P_gq^(2) and Delta P_gg^(2). The resulting next-to-next-to-leading order (NNLO) corrections to the evolution of polarized parton distributions are illustrated and found to be small even at rather large values of the strong coupling constant alpha_s.Proceedings of Science 2014, 10 (2014). doi:10.22323/1.211.0040info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion12th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, Hamburg, GermanySISSA2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171174https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03189%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.211.0040info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1712092025-07-30T12:43:09Zec_fundedresourcesVDBopenaireengKuzmin, A.Anspoks, A.Kalinko, A.Timoshenko, J.Kalendarev, R.Extended x-ray absorption fine structure spectroscopy and first-principles study of SnWO4info:eu-repo/classification/ddc/530The local atomic structure in α- and β-SnWO 4 was studied bysynchrotron radiation W L 3 -edge X-ray absorption spectroscopy at 10 and 300 K.Strongly distorted WO 6 octahedra were found in α-SnWO 4 , whereas nearly regularWO 4 tetrahedra were observed in β-SnWO 4 , confirming previous results. Thestructural results obtained were supported by the first-principles calculations,suggesting that the second-order Jahn-Teller effect is responsible for octahedraldistortion.Physica scripta 89(4), 044005 - (2014). doi:10.1088/0031-8949/89/04/044005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIoP Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/171209https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03200%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0031-8949/89/04/044005info:eu-repo/semantics/altIdentifier/issn/0031-8949info:eu-repo/semantics/altIdentifier/issn/1402-4896info:eu-repo/semantics/altIdentifier/wos/WOS:000333449400006info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1712102025-07-30T12:43:01Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengTimoshenko, JanisAnspoks, AndrisKalinko, AleksandrKuzmin, AlexeiAnalysis of Extended X-Ray Absorption Fine Structure Data From Copper Tungstate by the Reverse Monte Carlo Methodinfo:eu-repo/classification/ddc/530The static disorder and lattice dynamics of crystalline materials can be efficiently studied using reverse Monte Carlo simulations of extended x-ray absorption fine structure spectra (EXAFS). In this work we demonstrate the potentiality of this method on an example of copper tungstate CuWO4. The simultaneous analysis of the Cu K and W L3 edges EXAFS spectra allowed us to follow local structure distortion as a function of temperature.Physica scripta 89(4), 044006 (2014). doi:10.1088/0031-8949/89/04/044006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIoP Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171210https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03201%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0031-8949info:eu-repo/semantics/altIdentifier/doi/10.1088/0031-8949/89/04/044006info:eu-repo/semantics/altIdentifier/issn/1402-4896info:eu-repo/semantics/altIdentifier/wos/WOS:000333449400007info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1712122025-07-30T12:43:09Zec_fundedresourcesVDBopenaireengKuzmin, A.Anspoks, A.Kalinko, A.Timoshenko, J.Kalendarev, R.X-ray absorption spectroscopy of Cu-doped $WO_{3}$ films for use inelectrochemical metallization cell memoryinfo:eu-repo/classification/ddc/660We have performed the first synchrotron radiation X-ray absorption spectroscopy (EXAFS/XANES) study of the local atomic and electronic structure around Cu and W ions in WO3/Cu/WO3/Si and WO3/Cu/Si multilayered structures, aimed for the application in the electrochemical metallization cell memory. The influence of low-temperature annealing at 135 °C has been investigated in details, and a structural model of Cu-doped WO3 films is proposedJournal of non-crystalline solids 401, 87 - 91 (2014). doi:10.1016/j.jnoncrysol.2014.01.022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/171212https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03203%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0022-3093info:eu-repo/semantics/altIdentifier/wos/WOS:000341463300015info:eu-repo/semantics/altIdentifier/issn/1873-4812info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jnoncrysol.2014.01.022info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1712682021-11-10T11:44:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuchmuller, W.Domcke, V.Schmitz, K.The Chaotic Regime of D-Term Inflationinflation: D-terminflation: chaosinflaton: potentialinflaton: couplinginflation: hybridfluctuation: quantumfalse vacuum: decaydecoherence: timeenergy: densityscale: Planckslow-roll approximationtime dependenceWe consider D-term inflation for small couplings of the inflaton to matter fields. Standard hybrid inflation then ends at a critical value of the inflaton field that exceeds the Planck mass. During the subsequent waterfall transition the inflaton continues its slow-roll motion, whereas the waterfall field rapidly grows by quantum fluctuations. Beyond the decoherence time, the waterfall field becomes classical and approaches a time-dependent minimum, which is determined by the value of the inflaton field and the self-interaction of the waterfall field. During the final stage of inflation, the effective inflaton potential is essentially quadratic, which leads to the standard predictions of chaotic inflation. The model illustrates how the decay of a false vacuum of GUT-scale energy density can end in a period of `chaotic inflation'.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171268https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03220%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.6300info:eu-repo/grantAgreement/EC//289442
oai:bib-pubdb1.desy.de:1712702025-07-30T12:43:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBernardoni, FabioBlossier, BenoitSommer, RainerBulava, JohnDella Morte, MicheleFritzsch, PatrickGarron, NicolasGérardin, AntoineHeitger, Jochenvon Hippel, GeorgSimma, HubertDecay Constants of B-Mesons from Non-Perturbative HQET with two Light Dynamical Quarksinfo:eu-repo/classification/ddc/530We present a computation of B-meson decay constants from lattice QCD simulations within the framework of Heavy Quark Effective Theory for the b-quark. The next-to-leading order corrections in the HQET expansion are included non-perturbatively. Based on Nf=2 gauge field ensembles, covering three lattice spacings a (0.08-0.05)fm and pion masses down to 190MeV, a variational method for extracting hadronic matrix elements is used to keep systematic errors under control. In addition we perform a careful autocorrelation analysis in the extrapolation to the continuum and to the physical pion mass limits. Our final results read fB=186(13)MeV, fBs=224(14)MeV and fBs/fB=1.203(65). A comparison with other results in the literature does not reveal a dependence on the number of dynamical quarks, and effects from truncating HQET appear to be negligible.Physics letters / B B735, 349 - 356 (2014). doi:10.1016/j.physletb.2014.06.051info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171270https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03222%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000340048900061info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1404.3590info:eu-repo/semantics/altIdentifier/issn/0370-2693info:eu-repo/semantics/altIdentifier/issn/1873-2445info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2014.06.051info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:1712742025-07-30T12:43:18Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBagnaschi, E.Harlander, R. V.Liebler, S.Mantler, H.Slavich, P.Vicini, A.Towards precise predictions for Higgs-boson production in the MSSMinfo:eu-repo/classification/ddc/530Higgs particle: productionHiggs particle: pseudoscalar particlegluon: fusionbottom: annihilationparton: distribution functionquantum chromodynamics: correctionminimal supersymmetric standard modelCERN LHC CollWe study the production of scalar and pseudoscalar Higgs bosons via gluon fusion and bottom-quark annihilation in the MSSM. Relying on the NNLO-QCD calculation implemented in the public code SusHi, we provide precise predictions for the Higgs-production cross section in six benchmark scenarios compatible with the LHC searches. We also provide a detailed discussion of the sources of theoretical uncertainty in our calculation. We examine the dependence of the cross section on the renormalization and factorization scales, on the precise definition of the Higgs-bottom coupling and on the choice of PDFs, as well as the uncertainties associated to our incomplete knowledge of the SUSY contributions through NNLO. In particular, a potentially large uncertainty originates from uncomputed higher-order QCD corrections to the bottom-quark contributions to gluon fusion.Journal of high energy physics 2014(6), 167 (2014). doi:10.1007/JHEP06(2014)167info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171274https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03226%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/wos/WOS:000338644700005info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP06(2014)167info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//315877info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//321133
oai:bib-pubdb1.desy.de:1714412025-07-30T12:43:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHatsuda, YasuyukiIto, KatsushiSatoh, YujiSuzuki, JunjiQuantum Wronskian approach to six-point gluon scattering amplitudes at strong couplinginfo:eu-repo/classification/ddc/530Bethe ansatz: thermodynamicalgluon: scattering amplitudemodel: integrabilitysupersymmetry: 4regularization: latticegauge field theory: Yang-Millsfield theory: conformalstrong couplingtwistWilson loopdualityWe study the six-point gluon scattering amplitudes in N=4 super Yang-Mills theory at strong coupling based on the twisted Z_4-symmetric integrable model. The lattice regularization allows us to derive the associated thermodynamic Bethe ansatz (TBA) equations as well as the functional relations among the Q-/T-/Y-functions. The quantum Wronskian relation for the Q-/T-functions plays an important role in determining a series of the expansion coefficients of the T-/Y-functions around the UV limit, including the dependence on the twist parameter. Studying the CFT limit of the TBA equations, we derive the leading analytic expansion of the remainder function for the general kinematics around the limit where the dual Wilson loops become regular-polygonal. We also compare the rescaled remainder functions at strong coupling with those at two, three and four loops, and find that they are close to each other along the trajectories parameterized by the scale parameter of the integrable model.Journal of high energy physics 2014(8), 162 (2014). doi:10.1007/JHEP08(2014)162info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171441https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03249%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP08(2014)162info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1714792021-11-10T11:44:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCzakon, MichalMitov, AlexanderPapucci, MicheleRuderman, Joshua T.Weiler, AndreasClosing the stop gapsupersymmetry: conservation lawR paritytop: massstop: massscale: electroweak interactionsupersymmetrygapneutralinostatisticssquarkLight stops are a hallmark of the most natural realizations of weak-scale supersymmetry. While stops have been extensively searched for, there remain open gaps around and below the top mass, due to similarities of stop and top signals with current statistics. We propose a new fast-track avenue to improve light stop searches for R-parity conserving supersymmetry, by comparing top cross section measurements to the theoretical prediction. Stop masses below ~ 180 GeV can now be ruled out for a light neutralino. The possibility of a stop signal contaminating the top mass measurement is also briefly addressed.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171479https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03283%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.1043info:eu-repo/grantAgreement/EC//291377
oai:bib-pubdb1.desy.de:1715122021-11-10T11:45:24Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengStewart, Iain W.Tackmann, Frank J.Waalewijn, Wouter J.Dissecting Soft Radiation with Factorizationjet: rapiditygluon: jetquantum chromodynamics: factorizationradiation: initial-state interactionfactorization: violationparton: interactionhadron hadron: interactionhadronization: modelnonperturbativeunderlying eventmass spectruminitial stateinterferencecolorquarkAn essential part of high-energy hadronic collisions is the soft hadronic activity that underlies the primary hard interaction. It includes soft radiation from the primary hard partons, secondary multiple parton interactions (MPI), and factorization-violating effects. The invariant mass spectrum of the leading jet in $Z+\mathrm{jet}$ and $H+\mathrm{jet}$ events is directly sensitive to these effects, and we use a QCD factorization theorem to predict its dependence on the jet radius $R$, jet ${p}_{T}$, jet rapidity, and partonic process for both the perturbative and nonperturbative components of primary soft radiation. We prove that the nonperturbative contributions involve only odd powers of $R$, and the linear $R$ term is universal for quark and gluon jets. The hadronization model in Pythia8 agrees well with these properties. The perturbative soft initial state radiation (ISR) has a contribution that depends on the jet area in the same way as the underlying event, but this degeneracy is broken by dependence on the jet ${p}_{T}$. The size of this soft ISR contribution is proportional to the color state of the initial partons, yielding the same positive contribution for $gg\to Hg$ and $gq\to Zq$, but a negative interference contribution for $q\overline{q}\to Zg$. Hence, measuring these dependencies allows one to separate hadronization, soft ISR, and MPI contributions in the data.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171512https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03313%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.6722info:eu-repo/grantAgreement/EC//328913
oai:bib-pubdb1.desy.de:1715192021-11-10T11:45:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMitev, VladimirPomoni, ElliThe Exact Effective Couplings of 4D N=2 gauge theoriessupersymmetry: 4coupling constant: renormalizationoperator: anomalous dimensionexpansion: weak couplingrenormalization: finitegravitation: dualityfield theory: conformalAdS/CFT correspondencegauge field theorystring tensionThe anomalous dimensions of operators in the purely gluonic SU(2,1|2) sector of any planar conformal N=2 theory can be read off from the N=4 SYM results by replacing the N=4 coupling constant by an interpolating function of the N=2 coupling constants, to which we refer to as the effective coupling. For a large class of N=2 theories we compute the weak coupling expansion of these functions as well as the leading strong coupling term by employing supersymmetric localization. Via Feynman diagrams, we interpret our results as the relative (between N=2 and N=4) finite renormalization of the coupling constant. Using the AdS/CFT dictionary, we identify the effective couplings with the effective string tensions of the corresponding gravity dual theories. Thus, any observable in the SU(2,1|2) sector can be obtained from its N=4 counterpart by replacing the N=4 coupling constant by the universal, for a given theory, effective coupling.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171519https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03320%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.3629info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1715232025-07-17T09:26:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBaker, M.Marquard, PeterPenin, AlexanderPiclum, JanSteinhauser, MatthiasHyperfine splitting in positronium to ${\cal O}(\alpha^7m_e)$: one-photon annihilation contributioninfo:eu-repo/classification/ddc/550We present the complete result for the ${\cal O}(\alpha^7m_e)$ one-photon annihilation contribution to the hyperfine splitting of the ground state energy levels in positronium. Numerically it increases the prediction of quantum electrodynamics by $217\pm 1$ kHz.Physical review letters 112(12), 120407 (2014). doi:10.1103/PhysRevLett.112.120407info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171523https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03324%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.112.120407info:eu-repo/semantics/altIdentifier/wos/WOS:000333921000001info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1402.0876info:eu-repo/semantics/altIdentifier/pmid/pmid:24724635info:eu-repo/semantics/altIdentifier/doi/10.3204/DESY-2014-03324info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/semantics/altIdentifier/issn/1079-7114info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:1719432025-07-17T09:26:21Zec_fundedresourcesVDBopenaireengMichalik, S.Michalikova, J.Pavlovic, M.Sovak, P.Liermann, H.-P.Miglierini, M.Structural modifications of swift-ion-bombarded metallic glasses studied by high-energy X-ray synchrotron radiationinfo:eu-repo/classification/ddc/670Modifications of structural arrangements including relaxation processes were investigated in swift-heavy-ion-bombarded Fe73Cu1Nb3Si16B7 metallic glass. The irradiation of as-quenched amorphous ribbons was accomplished with 3 MeV u−1 (u is atomic mass unit) and 11.1 MeV u−1 Au ions with total fluences of up to 1 × 1013 ions cm−2. Specimens irradiated with 3 MeV u−1 ions were subsequently annealed for 4 h at 350 °C. Ion-irradiated samples including those heat-treated were studied using in situ temperature-dependent diffraction of high-energy X-ray synchrotron radiation (wavelength of 0.020689 nm). Cyclic heating–cooling regimes were applied during the measurements. A tendency towards a higher degree of disorder was revealed as a function of the ion fluence in both types of alloys. During the first heating–cooling cycle, a remarkable hysteresis is observed in the position and line width of the first diffraction peak, especially in the as-quenched irradiated alloys. The hysteresis increases with rising ion fluence but vanishes completely after the first heating–cooling cycle. No hysteresis is found in the irradiated and subsequently annealed alloys. The irradiation-induced structural modifications have some features similar to the effects caused by mechanical deformation.Acta materialia 80, 309 - 316 (2014). doi:10.1016/j.actamat.2014.07.072info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/171943https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03449%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2014.07.072info:eu-repo/semantics/altIdentifier/wos/WOS:000344208300027info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1719512025-07-30T12:44:18Zec_fundedresourcesVDBopenaireengTimoshenko, JanisAnspoks, AndrisKalinko, AleksandrKuzmin, AlexeiLocal structure and dynamics of wurtzite-type ZnO from simulation-based EXAFS analysisinfo:eu-repo/classification/ddc/530Conventional methods of EXAFS data analysis are often limited to the nearest coordination shells of the absorbing atom due to the difficulties in accurate accounting for the so-called multiple-scattering effects. Besides, it is often difficult to resolve the non-equivalent groups of atoms in a single coordination shell due to strong correlation between structural parameters. In this study we overcome these problems by applying two different simulation-based methods, i.e., classical molecular dynamics (MD) and reverse Monte with evolutionary algorithm (EA), to the analysis of the Zn K-edge EXAFS data for wurtzite-type bulk ZnO. The RMC/EA-EXAFS method allowed us to separate the contributions of thermal disorder and the effect of noncentrosymmetric zinc oxide structure, being responsible for its piezoelectrical and pyroelectrical properties. The MD-EXAFS method allowed us to test the accuracy of several available force-field models, which are commonly used in the MD simulations of ZnO nanostructures.Physica status solidi / C 11(9-10), 1472 - 1475 (2014). doi:10.1002/pssc.201300615info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/171951https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03456%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1002/pssc.201300615info:eu-repo/semantics/altIdentifier/wos/WOS:000343809200021info:eu-repo/semantics/altIdentifier/issn/1862-6351info:eu-repo/semantics/altIdentifier/issn/1610-1642info:eu-repo/semantics/altIdentifier/issn/1610-1634info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1719522025-08-03T02:55:56Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengTimoshenko, J.Anspoks, A.Kalinko, A.Kuzmin, A.Temperature dependence of the local structure and lattice dynamics of wurtzite-type ZnOinfo:eu-repo/classification/ddc/670Temperature-dependent (10–300 K) Zn K-edge extended X-ray absorption fine structure (EXAFS) spectra of polycrystalline wurtzite-type ZnO were analyzed using ab initio multiple-scattering theory and taking into account anisotropy of the crystallographic structure and thermal disorder. We employed two different simulation approaches: classical molecular dynamics (MD) and reverse Monte Carlo coupled with an evolutionary algorithm (RMC/EA method). The accuracy of several force-field models, which are commonly used in the MD simulations of bulk and nanostructured ZnO, was tested based on a comparison between the experimental and simulated Zn K-edge EXAFS spectra. It was found that available force-field models fail to describe accurately many-atom distribution functions. A more accurate solution was obtained with the RMC/EA method, which allowed us also to resolve the non-equivalent groups of atoms in the first two coordination shells around the absorbing Zn atom and to follow the changes of structural parameters as the temperature varied. It was found that upon increasing temperature the structure of ZnO becomes more anisotropic due to the increase of internal parameter u of the oxygen Wyckoff position (2b) and related Zn0–O2 distances.Acta materialia 79, 194 - 202 (2014). doi:10.1016/j.actamat.2014.07.029info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/171952https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03457%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2014.07.029info:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/wos/WOS:000342718400020info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1720712025-07-30T12:45:26Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBruno, MattiaSchaefer, StefanSommer, RainerALPHA CollaborationTopological susceptibility and the sampling of field space in $\mathrm{N_{ f}}$ = 2 lattice QCD simulationsinfo:eu-repo/classification/ddc/530We present a measurement of the topological susceptibility in two flavor QCD. In this observable, large autocorrelations are present and also sizable cutoff effects have to be faced in the continuum extrapolation. Within the statistical accuracy of the computation, the result agrees with the expectation from leading order chiral perturbation theory.Journal of high energy physics 2014(8), 150 (2014). doi:10.1007/JHEP08(2014)150info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172071https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03536%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP08(2014)150info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.5363info:eu-repo/semantics/altIdentifier/wos/WOS:000347894400002info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:1720972025-07-30T12:45:33Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengOlive, K. A.Agashe, K.Bauer, C. W.Liddle, A.Ligeti, Z.Lin, C.-J.Liss, T. M.Littenberg, L.Lugovsky, K. S.Lugovsky, S. B.Maltoni, F.Mannel, T.Manohar, A. V.Beatty, J. J.Marciano, W. J.Martin, A. D.Masoni, A.Matthews, J.Milstead, D.Molaro, P.Moenig, KlausMoortgat, F.Mortonson, M. J.Murayama, H.Belousov, V. I.Nakamura, K.Narain, M.Nason, P.Navas, S.Neubert, M.Nevski, P.Nir, Y.Pape, L.Parsons, J.Patrignani, C.Beringer, J.Peacock, J. A.Pennington, M.Petcov, S. T.Piepke, A.Pomarol, A.Quadt, A.Raby, S.Rademacker, J.Raffelt, G.Ratcliff, B. N.Bernardi, G.Richardson, P.Ringwald, AndreasRoesler, S.Rolli, S.Romaniouk, A.Rosenberg, L. J.Rosner, J. L.Rybka, G.Sachrajda, C. T.Sakai, Y.Bethke, S.Salam, G. P.Sarkar, S.Sauli, F.Schneider, O.Scholberg, K.Scott, D.Sharma, V.Sharpe, S. R.Silari, M.Sjöstrand, T.Bichsel, H.Skands, P.Smith, J. G.Smoot, G. F.Spanier, S.Spieler, 120 H.Spiering, ChristianStahl, A.Stanev, T.Stone, S. L.Sumiyoshi, T.Biebel, O.Syphers, M. J.Takahashi, F.Tanabashi, M.Terning, J.Tiator, L.Titov, M.Tkachenko, N. P.Törnqvist, N. A.Tovey, D.Valencia, G.Blucher, E.Venanzoni, G.Vincter, M. G.Vogel, P.Vogt, A.Wakely, S. P.Walkowiak, W.Walter, C. W.Ward, D. R.Weiglein, GeorgWeinberg, D. H.Blusk, S.Weinberg, E. J.White, M.Wiencke, L. R.Wohl, C. G.Wolfenstein, L.Womersley, J.Woody, C. L.Workman, R. L.Yamamoto, A.Yao, W.-M.Amsler, C.Brooijmans, G.Zeller, G. P.Zenin, O. V.Zhang, J.Zyla, P. A.Zhu, R.-Y.Zimmermann, F.Particle Data Group CollaborationBuchmueller, O.Burkert, V.Bychkov, M. A.Cahn, R. N.Carena, M.Ceccucci, A.Cerri, A.Chakraborty, D.Chen, M.-C.Antonelli, M.Chivukula, R. S.Copic, 28 K.Cowan, G.Dahl, O.D'Ambrosio, G.Damour, T.de Florian, D.de Gouvea, A.DeGrand, T.de Jong, P.Arguin, J.-F.Dissertori, G.Dobrescu, B. A.Doser, 23 M.Drees, 10 M.Dreiner, H. K.Edwards, D. A.Eidelman, S.Erler, J.Ezhela, V. V.Fetscher, W.Asner, D. M.Fields, B. D.Foster, BrianFreitas, A.Gaisser, T. K.Gallagher, H.Garren, L.Gerber, H.-J.Gerbier, G.Gershon, T.Gherghetta, T.Baer, H.Golwala, S.Goodman, M.Grab, C.Gritsan, A. V.Grojen, C.Groom, D. E.Grünewald, M.Gurtu, A.Gutsche, T.Haber, H. E.Band, H. R.Hagiwara, K.Hanhart, C.Hashimoto, S.Hayato, Y.Hayes, K. G.Heffner, M.Heltsley, B.Hernández-Rey, J. J.Hikasa, K.Höcker, A.Barnett, R. M.Holder, J.Holtkamp, A.Huston, J.Jackson, J. D.Johnson, K. F.Junk, T.Kado, M.Karlen, D.Katz, U. F.Klein, S. R.Basaglia, T.Klempt, 73 E.Kowalewski, R. V.Krauss, F.Kreps, M.Krusche, B.Kuyanov, Yu. V.Kwon, Y.Lahav, O.Laiho, J.Langacker, P.Review of Particle Physicsinfo:eu-repo/classification/ddc/530The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,283 new measurements from 899 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as heavy neutrinos, supersymmetric and technicolor particles, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as Supersymmetry, Extra Dimensions, Particle Detectors, Probability, and Statistics. Among the 112 reviews are many that are new or heavily revised including those on: Dark Energy, Higgs Boson Physics, Electroweak Model, Neutrino Cross Section Measurements, Monte Carlo Neutrino Generators, Top Quark, Dark Matter, Dynamical Electroweak Symmetry Breaking, Accelerator Physics of Colliders, High-Energy Collider Parameters, Big Bang Nucleosynthesis, Astrophysical Constants and Cosmological Parameters.Chinese physics / C 38(9), 090001 (2014). doi:10.1088/1674-1137/38/9/090001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172097https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03548%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0254-3052info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-03548info:eu-repo/semantics/altIdentifier/doi/10.1088/1674-1137/38/9/090001info:eu-repo/semantics/altIdentifier/wos/WOS:000344135900001info:eu-repo/semantics/altIdentifier/issn/1674-1137info:eu-repo/grantAgreement/EC//226371
oai:bib-pubdb1.desy.de:1721502025-07-30T12:46:22Zec_fundedresourcesVDBopenaireengBraz Fernandes, Francisco ManuelOliveira, J. P.Machado, A.Schell, NorbertXRD Study of NiTi Endodontic Files Using Synchrotron Radiationinfo:eu-repo/classification/ddc/620Two types of endodontic files (ProFile and Mtwo) were studied in order to analyze the effect of geometry on the stress-induced martensitic (SIM) transformation during bending. The use of a fine beam spot of synchrotron radiation allowed a detailed structural characterization with a fine spatial resolution. Experimental evidence of the effect of the cross-section geometry on the stress localization giving rise to different degrees of SIM transformation is presented for the first time in the published literature.Journal of materials engineering and performance 23(7), 2477 - 2481 (2014). doi:10.1007/s11665-014-1056-yinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/172150https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03591%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000339010700029info:eu-repo/semantics/altIdentifier/doi/10.1007/s11665-014-1056-yinfo:eu-repo/semantics/altIdentifier/issn/1544-1024info:eu-repo/semantics/altIdentifier/issn/1059-9495info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1721512025-07-30T12:46:11Zec_fundedresourcesVDBopenaireengCavaleiro, A. J.Ramos, A. S.Braz Fernandes, F. M.Schell, N.Vieira, M. T.In Situ Characterization of $NiTi/Ti_{6}Al_{4}V$ Joints During Reaction-Assisted Diffusion Bonding Using Ni/Ti Multilayersinfo:eu-repo/classification/ddc/620Reaction-assisted diffusion bonding process of NiTi and Ti6Al4V was studied in situ. For this purpose, experiments were carried out at the High Energy Materials Science beamline (P-07) at PETRA-III (DESY). Ni/Ti multilayer thin films 2.5 μm thick with 12 and 25 nm modulation periods were directly deposited by magnetron sputtering onto the materials being joined. The NiTi and Ti6Al4V coated parts were placed with the films facing each other in a dilatometer equipped with Kapton windows for the x-ray beams. Microjoining was promoted by applying a 10 MPa pressure and inductively heating the materials, while simultaneously acquiring x-ray diffraction scans across the bond interface. Sound joints were produced at 750 °C. The formation of the NiTi2 phase could not be avoided.Journal of materials engineering and performance 23(5), 1625 - 1629 (2014). doi:10.1007/s11665-014-0930-yinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/172151https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03592%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1059-9495info:eu-repo/semantics/altIdentifier/issn/1544-1024info:eu-repo/semantics/altIdentifier/doi/10.1007/s11665-014-0930-yinfo:eu-repo/semantics/altIdentifier/wos/WOS:000335160900018info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1723732025-07-30T12:46:47Zec_fundedresourcesVDBopenaireengXu, ChenKlanner, RobertGarutti, ErikaHellweg, Wolf-LukasInfluence of X-ray irradiation on the properties of the Hamamatsu silicon photomultiplier S10362-11-050Cinfo:eu-repo/classification/ddc/530photomultiplier: siliconX-ray: irradiationradiation: damageperformancephotomultiplier: designstabilitysemiconductor: conductivityionization: yieldWe have investigated the effects of X-ray irradiation to doses of 0, 200 Gy, 20 kGy, 2 MGy, and 20 MGy on the Hamamatsu silicon-photomultiplier (SiPM) S10362-11-050C. The SiPMs were irradiated without applied bias voltage. From current-voltage, capacitance/conductance-voltage, -frequency, pulse-shape, and pulse-area measurements, the SiPM characteristics below and above breakdown voltage were determined. Significant changes of some SiPM parameters are observed. Up to a dose of 20 kGy the performance of the SiPMs is hardly affected by X-ray radiation damage. For doses of 2 and 20 MGy the SiPMs operate with hardly any change in gain, but with a significant increase in dark-count rate and cross-talk probability.Nuclear instruments & methods in physics research / A 762, 149 - 161 (2014). doi:10.1016/j.nima.2014.05.112info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/172373https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03702%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nima.2014.05.112info:eu-repo/semantics/altIdentifier/issn/0168-9002info:eu-repo/semantics/altIdentifier/wos/WOS:000339817500019info:eu-repo/semantics/altIdentifier/issn/1872-9576info:eu-repo/grantAgreement/EC//256984
oai:bib-pubdb1.desy.de:1724122025-07-30T12:46:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengWinter, WalterBecker Tjus, J.Klein, S. R.Impact of secondary acceleration on the neutrino spectra in gamma-ray burstsinfo:eu-repo/classification/ddc/520We discuss the acceleration of secondary muons, pions, and kaons in gamma-ray bursts within the internal shock scenario, and their impact on the neutrino fluxes. We introduce a two-zone model consisting of an acceleration zone (the shocks) and a radiation zone (the plasma downstream the shocks). The acceleration in the shocks, which is an unavoidable consequence of the efficient proton acceleration, requires efficient transport from the radiation back to the acceleration zone. On the other hand, stochastic acceleration in the radiation zone can enhance the secondary spectra of muons and kaons significantly if there is a sufficiently large turbulent region. Overall, it is plausible that neutrino spectra can be enhanced by up to a factor of two at the peak by stochastic acceleration, that an additional spectral peaks appears from shock acceleration of the secondary muons and pions, and that the neutrino production from kaon decays is enhanced. Depending on the GRB parameters, the general conclusions concerning the limits to the internal shock scenario obtained by recent IceCube and ANTARES analyses may be affected by up to a factor of two by secondary acceleration. Most of the changes occur at energies above 10^7 GeV, so the effects for next-generation radio-detection experiments will be more pronounced. In the future, however, if GRBs are detected as high-energy neutrino sources, the detection of one or several pronounced peaks around 10^6 GeV or higher energies could help to derive the basic properties of the magnetic field strength in the GRB.Astronomy and astrophysics 569, A58 - (2014). doi:10.1051/0004-6361/201423745info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172412https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03719%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000343092100059info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.0574info:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201423745info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//289442
oai:bib-pubdb1.desy.de:1724362025-07-17T09:26:16ZVDBdriveropen_accessopenaireec_fundedresourcesdnbdeliveryengBuchmüller, WilfriedDudas, EmilianHeurtier, LucienWieck, ClemensLarge-field inflation and supersymmetry breakinginfo:eu-repo/classification/ddc/530inflation: chaossupersymmetry: symmetry breakinggravitation: modelmass: gravitationinflaton: massgravitino: massstabilitysupergravityembeddingKaehlerLarge-field inflation is an interesting and predictive scenario. Its non-trivial embedding in supergravity was intensively studied in the recent literature, whereas its interplay with supersymmetry breaking has been less thoroughly investigated. We consider the minimal viable model of chaotic inflation in supergravity containing a stabilizer field, and add a Polonyi field. Furthermore, we study two possible extensions of the minimal setup. We show that there are various constraints: first of all, it is very hard to couple an O'Raifeartaigh sector with the inflaton sector, the simplest viable option being to couple them only through gravity. Second, even in the simplest model the gravitino mass is bounded from above parametrically by the inflaton mass. Therefore, high-scale supersymmetry breaking is hard to implement in a chaotic inflation setup. As a separate comment we analyze the simplest chaotic inflation construction without a stabilizer field, together with a supersymmetrically stabilized Kahler modulus. Without a modulus, the potential of such a model is unbounded from below. We show that a heavy modulus cannot solve this problem.Journal of high energy physics 2014(9), 53 (2014). doi:10.1007/JHEP09(2014)053info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172436https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03735%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP09(2014)053info:eu-repo/semantics/altIdentifier/wos/WOS:000347899000001info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/grantAgreement/EC//226371
oai:bib-pubdb1.desy.de:1724372025-07-30T12:46:49Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMerle, AlexanderMorisi, StefanoWinter, WalterCommon origin of reactor and sterile neutrino mixinginfo:eu-repo/classification/ddc/530If the hints for light sterile neutrinos from short-baseline anomalies are to be taken seriously, global fits indicate active-sterile mixings of a magnitude comparable to the known reactor mixing. We therefore study the conditions under which the active-sterile and reactor mixings could have the same origin in an underlying flavour model. As a starting point, we use $\mu-\tau$ symmetry in the active neutrino sector, which (for three neutrinos) yields a zero reactor neutrino angle and a maximal atmospheric one. We demonstrate that adding one sterile neutrino can change this setting, so that the active-sterile mixing and non-zero $\theta_{13}$ can be generated simultaneously. From the phenomenological perspective, electron (anti)neutrino disappearance can be easily accommodated, while muon neutrino disappearance can vanish. It is, however, difficult to reconcile the LSND results with this scenario. From the theory perspective, the setting requires the misalignment of some of the flavon vacuum expectation values, which may be achieved in an $A_4$ or $D_4$ flavour symmetry model using extra dimensions.Journal of high energy physics 2014(7), 39 (2014). doi:10.1007/JHEP07(2014)039info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172437https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03736%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2014)039info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000339422600001info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1402.6332info:eu-repo/grantAgreement/EC//289442info:eu-repo/grantAgreement/EC//297557
oai:bib-pubdb1.desy.de:1725482025-07-30T12:47:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFeneberg, MartinOsterburg, SarahLi, JinminRomero, María FátimaGarke, BerndGoldhahn, RüdigerNeumann, Maciej D.Esser, NorbertYan, JianchangZeng, JianpingWang, JunxiOptical properties of magnesium doped $Al_{x}Ga_{1−x}N$ (0.61 ≤ x ≤ 0.73)info:eu-repo/classification/ddc/530We investigate the optical properties of Al x Ga1– x N:Mg with aluminum content of 0.61 ≤ x ≤ 0.733 in comparison to undoped and silicon doped reference samples. The ordinary dielectric functions, excitation, and emission spectra are reported at different temperatures. A comprehensive analysis yields quantitative data on the valence band structure of the ternary alloy, i.e., splitting and order of valence bands with different symmetries. Finally, the near band gap emission in AlGaN:Mg is found to be most probably dominated by donor to free-hole recombination.Journal of applied physics 116(14), 143103 (2014). doi:10.1063/1.4897449info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Institute of Physics2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172548https://bib-pubdb1.desy.de/search?p=id:%22DESY-2014-03784%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0021-8979info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4897449info:eu-repo/semantics/altIdentifier/issn/1089-7550info:eu-repo/semantics/altIdentifier/wos/WOS:000343988000003info:eu-repo/grantAgreement/EC//213238
oai:bib-pubdb1.desy.de:1725622025-07-30T12:47:29Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLenser, C.Köhl, A.Patt, M.Schneider, C. M.Waser, R.Dittmann, R.Band alignment at memristive metal-oxide interfaces investigated by hard x-ray photoemission spectroscopyinfo:eu-repo/classification/ddc/530The electronic structure and band alignment at metal/oxide interfaces for nonvolatile memory applications are investigated by hard x-ray photoelectron spectroscopy (HAXPES) and DC transport measurements, using acceptor doped SrTiO3 as a model memristive oxide. Metal-insulator-metal (MIM) structures with a noble metal (Pt) top electrode form a Schottky barrier and exhibit rectifying properties, while a reactive metal (Ti) as top electrode shows symmetric I(V) characteristics and a flat band situation at the interface. The transition from rectifying to ohmic I(V) relations with increasing Ti thickness is discussed with respect to the electrochemical reaction at the interface, the band alignment at the electrode/oxide interface, and the slope of the energy bands across the MIM structure.Physical review / B 90(11), 115312 (2014). doi:10.1103/PhysRevB.90.115312info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/172562https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03798%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.115312info:eu-repo/semantics/altIdentifier/issn/0556-2805info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/wos/WOS:000342662600006info:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/grantAgreement/EC//235303
oai:bib-pubdb1.desy.de:1872642025-07-17T09:25:55Zec_fundedresourcesVDBdriveropen_accessopenairednbdeliveryengAblinger, JakobBlümlein, JohannesRaab, ClemensSchneider, CarstenWißbrock, FabianCalculating massive 3-loop graphs for operator matrix elements by the method of hyperlogarithmsinfo:eu-repo/classification/ddc/530We calculate convergent 3-loop Feynman diagrams containing a single massive loop equipped with twist τ=2τ=2 local operator insertions corresponding to spin N . They contribute to the massive operator matrix elements in QCD describing the massive Wilson coefficients for deep-inelastic scattering at large virtualities. Diagrams of this kind can be computed using an extended version of the method of hyperlogarithms, originally being designed for massless Feynman diagrams without operators. The method is applied to Benz- and V -type graphs, belonging to the genuine 3-loop topologies. In case of the V -type graphs with five massive propagators, new types of nested sums and iterated integrals emerge. The sums are given in terms of finite binomially and inverse binomially weighted generalized cyclotomic sums, while the 1-dimensionally iterated integrals are based on a set of ∼30 square-root valued letters. We also derive the asymptotic representations of the nested sums and present the solution for N∈CN∈C. Integrals with a power-like divergence in N -space ∝aN,a∈R,a>1∝aN,a∈R,a>1, for large values of N emerge. They still possess a representation in x-space, which is given in terms of root-valued iterated integrals in the present case. The method of hyperlogarithms is also used to calculate higher moments for crossed box graphs with different operator insertions.Nuclear physics <Amsterdam> / B 885, 409 - 447 (2014). doi:10.1016/j.nuclphysb.2014.04.007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/187264https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03832%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.1137info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.04.007info:eu-repo/semantics/altIdentifier/wos/WOS:000339598300018info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1872742025-07-30T12:47:17Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAbdel-Rehim, A.Alexandrou, C.Constantinou, M.Drach, V.Hadjiyiannakou, K.Jansen, K.Koutsou, G.Vaquero, A.Disconnected quark loop contributions to nucleon observables in lattice QCDinfo:eu-repo/classification/ddc/530We perform a high statistics calculation of disconnected fermion loops on graphics processing units for a range of nucleon matrix elements extracted using lattice QCD. The isoscalar electromagnetic and axial vector form factors, the sigma terms and the momentum fraction and helicity are among the quantities we evaluate. We compare the disconnected contributions to the connected ones and give the physical implications on nucleon observables that probe its structure.Physical review / D 89(3), 034501 (2014). doi:10.1103/PhysRevD.89.034501info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/187274https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03842%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000331874000004info:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.6339info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.89.034501info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/grantAgreement/EC//238353info:eu-repo/grantAgreement/EC//283286info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:1872872025-07-30T12:47:48Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlexandrou, C.Constantinou, M.Drach, V.Hadjiyiannakou, K.Jansen, K.Koutsou, G.Strelchenko, A.Vaquero, A.Evaluation of disconnected quark loops for hadron structure using GPUsinfo:eu-repo/classification/ddc/004A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency when implemented on Graphics Processing Units (GPUs). We assess the performance of the various methods by studying the convergence and statistical accuracy obtained for observables that require a large number of stochastic noise vectors, such as the isoscalar nucleon axial charge. The various methods are also examined for the evaluation of sigma-terms where noise reduction techniques specific to the twisted mass formulation can be utilized thus reducing the required number of stochastic noise vectors.Computer physics communications 185(5), 1370 - 1382 (2014). doi:10.1016/j.cpc.2014.01.009info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth Holland Publ. Co.2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-01-25DEhttps://bib-pubdb1.desy.de/record/187287https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03851%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0010-4655info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1309.2256info:eu-repo/semantics/altIdentifier/wos/WOS:000334085600003info:eu-repo/semantics/altIdentifier/issn/1879-2944info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cpc.2014.01.009info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-03851info:eu-repo/semantics/altIdentifier/issn/1386-9485info:eu-repo/grantAgreement/EC//238353info:eu-repo/grantAgreement/EC//283286info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:1873962025-07-17T09:27:16Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengArina, ChiaraMartín-Lozano, VíctorNardini, GermanoDark matter versus $h → γγ$ and $h → γZ$ with supersymmetric tripletsinfo:eu-repo/classification/ddc/530dark matterneutralinotripletminimal supersymmetric standard modeltwo-photonLSPphoton photonsupersymmetryenhancementhierarchyphotonbinoThe Triplet extension of the MSSM (TMSSM) alleviates the little hierarchy problem and provides a significant enhancement of the loop-induced diphoton rate of the lightest CP-even Higgs h. In this paper we pursue the analysis of the TMSSM Higgs phenomenology by computing for the first time the h into Z + gamma decay. Interestingly we find that the rates of loop-induced decays are correlated and their signal strengths can rise up to 40% - 60% depending on the channel. We furthermore study the dark matter phenomenology of the TMSSM. The lightest neutralino is a good dark matter candidate in two regions. The first one is related to the Higgs and Z resonances and the LSP is mostly Bino. The second one is achieved for a mass larger than 90 GeV and the LSP behaves as the well-tempered neutralino. An advantage of the triplet contribution is that the well-tempered neutralino can be a Bino-Triplino mixture, relieving the problem of achieving M_2 ~ M_1 in unified scenarios. The dark matter constraints strongly affect the Higgs phenomenology, reducing the potential enhancements of the diphoton and of the Z + photon channels by 20% at most. These enhancements are however larger than the MSSM ones. In the near future, complementarity of dark matter direct searches and collider experiments will be crucial to probe most of the parameter space where the neutralino is the dark matter candidate.Journal of high energy physics 2014(8), 15 (2014). doi:10.1007/JHEP08(2014)015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/187396https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03891%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000347888000007info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP08(2014)015info:eu-repo/grantAgreement/EC//267117info:eu-repo/grantAgreement/EC//320421
oai:bib-pubdb1.desy.de:1917502025-07-30T12:47:56Zec_fundedresourcesVDBopenaireengMoch, Sven-OlafPrecision determination of the top-quark massinfo:eu-repo/classification/ddc/530top: massmass: polemass: energy dependencetop: decayhigher-order: 2quantum chromodynamicstotal cross sectionrenormalizationtranslationMonte CarloPrecision determinations of the top-quark mass require theory predictions with a well-defined mass parameter in a given renormalization scheme. The top-quark's running mass in the MSbar scheme can be extracted with good precision from the total cross section at next-to-next-to-leading order in QCD. The Monte Carlo top-quark mass parameter measured from comparison to events with top-quark decay products is not identical with the pole mass. Its translation to the pole mass scheme introduces an additional uncertainty of the order of 1 GeV.Proceedings of Science 054 (2014). doi:10.22323/1.211.0054info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.211.0054Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.211.0054<br/>12th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, LL2014, Weimar, Germany, 2014-04-27 - 2014-05-02SISSA2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/191750https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03940%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.22323/1.211.0054info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1408.6080info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1917562021-11-10T11:54:16Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSjöstrand, TorbjörnAsk, StefanChristiansen, Jesper R.Corke, RichardDesai, NishitaIlten, PhilipMrenna, StephenPrestel, StefanRasmussen, Christine O.Skands, Peter Z.An Introduction to PYTHIA 8.2PYTHIAprogrammingnumerical calculations: Monte Carloparton: showersparton: final stateparton: multiple productionparton: hadronizationstring: fragmentationp p: scatteringcross sectionnew physicsquantum chromodynamicsCERN LHC CollThe PYTHIA program is a standard tool for the generation of events in high-energy collisions, comprising a coherent set of physics models for the evolution from a few-body hard process to a complex multiparticle final state. It contains a library of hard processes, models for initial- and final-state parton showers, matching and merging methods between hard processes and parton showers, multiparton interactions, beam remnants, string fragmentation and particle decays. It also has a set of utilities and several interfaces to external programs. PYTHIA 8.2 is the second main release after the complete rewrite from Fortran to C++, and now has reached such a maturity that it offers a complete replacement for most applications, notably for LHC physics studies. The many new features should allow an improved description of data.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191756https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03946%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.3012info:eu-repo/grantAgreement/EC//315877
oai:bib-pubdb1.desy.de:1917862021-11-10T11:54:20Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengPriebe, GerdNakatsutsumi, MotoakiThorpe, IanMueller, BenjaminPelka, AlexanderAppel, KarenTschentscher, ThomasLederer, MaximilianHigh Energy/Intensity Lasers for HED Science at European XFELFree-electron laser facilities provide new applications in the field of high-pressure research including planetary materials. The European X-ray Free Electron Laser (XFEL) in Hamburg will start user operation in 2017 and will provide photon energies of up to 25 keV. With a photon flux of about $10^{12}$ photons/pulse, with a pulse duration of 2–100 fs and a repetition rate of up to 4.5 MHz during 600 μs long bursts with a repetition rate of 10 Hz, rendering up to 27000 pulses per second, this facility will provide unique opportunities to study material under extreme conditions. The high-energy density science instrument (HED) is one of the six baseline instruments at the European XFEL. It enables the study of dense material at strong excitation and high pressures, studying structural and electronic properties of excited states with hard x-rays. Besides the use of the x-ray FEL beam as a possible pump and/or probe, it will be equipped with a high contrast PW-class ultra-high power, a temporal shaped ultra-high energy, KJ-class and amJ-class MHz repetition rate, matching the X-ray burst structure, laser facility. Probing of the laser-generated excited states will be performed with the x-ray free electron laser.261 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionTopical Problems of Nonlinear Wave Physics, NWP-2014, Nizhny Novgorod, Russia, 2014-07-17 - 2014-07-232014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191786https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03975%22Researchersinfo:eu-repo/grantAgreement/EC//214499
oai:bib-pubdb1.desy.de:1918032021-11-10T11:54:22Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCagnazzo, AlessandraSchomerus, VolkerTlapák, VáclavHigh-Gradient Operators in the psl(2|2) Gross-Neveu ModelGross-Neveu modelperturbation theorysigma modelscalingO(N)It has been observed more than 25 years ago that sigma model perturbation theory suffers from strongly RG-relevant high-gradient operators. The phenomenon was first seen in 1-loop calculations for the O(N) vector model and it is known to persist at least to two loops. More recently, Ryu et al. suggested that a certain deformation of the psl(N|N) WZNW-model at level k=1 , or equivalently the psl(N|N) Gross–Neveu model, could be free of RG-relevant high-gradient operators and they tested their suggestion to leading order in perturbation theory. In this note we establish the absence of strongly RG-relevant high-gradient operators in the psl(2|2) Gross–Neveu model to all loops. In addition, we determine the spectrum for a large subsector of the model at infinite coupling and observe that all scaling weights become half-integer. Evidence for a conjectured relation with the CP1|2 sigma model is not found.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191803https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03991%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.4560info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918072021-11-10T11:54:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengIsachenkov, MikhailKirsch, IngoSchomerus, VolkerChiral Ring of Strange Metals: The Multicolor Limitfield theory: conformalenergy: lowchiral ringquantum chromodynamicssupersymmetry: 4coset spacestring modelcompactificationanti-de SittercolormetalThe low energy limit of a dense 2D adjoint QCD is described by a family of ${\cal N}=(2,2)$ supersymmetric coset conformal field theories. In previous work we constructed chiral primaries for a small number $N < 6$ of colors. Our aim in the present note is to determine the chiral ring in the multicolor limit where $N$ is sent to infinity. We shall find that chiral primaries are labeled by partitions and identify the ring they generate as the ring of Schur polynomials. Our findings impose strong constraints on the possible dual description through string theory in an $AdS_3$ compactification.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191807https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03995%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.4594info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918112025-07-17T08:48:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Bluemlein, J.Caminada, L.Lipka, K.Lohwasser, K.Moch, Sven-OlafPetti, R.Placakyte, R.Nucleon PDF separation with the collider and fixed-target datainfo:eu-repo/classification/ddc/530nucleon: parton: distribution functionparton: distribution function: measurednucleon nucleon: deep inelastic scatteringW: associated productioncharm: associated productionstrangeness: sealepton: asymmetryBatavia TEVATRON CollCERN LHC CollCHORUSNOMADATLASCMSWe consider the impact of the recent data obtained by the LHC, Tevatron, and fixed-target experiments on the nucleon quark distributions with a particular focus on disentangling different quark species. An improved determination of the poorly known strange sea distribution is obtained due to including data from the neutrino-induced deep-inelastic scattering experiments NOMAD and CHORUS. The impact of the associated (W + c) production data by CMS and ATLAS on the strange sea determination is also studied and a comparison with earlier results based on the collider data is discussed. Finally, the recent LHC and Tevatron data on the charged lepton asymmetry are compared to the NNLO ABM predictions and the potential of this input in improving the non-strange sea distributions is evaluated.Nuclear physics <Amsterdam> / B / Proceedings supplements 273-275, 1961 - 1966 (2014). doi:10.1016/j.nuclphysbps.2015.09.317info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion37th International Conference on High Energy Physics, ICHEP 2014, Valencia, Spain, 2014-07-02 - 2014-07-09Elsevier2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191811https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03999%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.7007info:eu-repo/semantics/altIdentifier/wos/WOS:000390295200315info:eu-repo/semantics/altIdentifier/issn/0920-5632info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysbps.2015.09.317info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918512025-07-30T12:48:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBaerwald, PhilippBustamante Ramirez, MauricioWinter, WalterAre gamma-ray bursts the sources of ultra-high energy cosmic rays?info:eu-repo/classification/ddc/540We reconsider the possibility that gamma-ray bursts (GRBs) are the sources of the ultra-high energy cosmic rays (UHECRs) within the internal shock model, assuming a pure proton composition of the UHECRs. For the first time, we combine the information from gamma-rays, cosmic rays, prompt neutrinos, and cosmogenic neutrinos quantitatively in a joint cosmic ray production and propagation model, and we show that the information on the cosmic energy budget can be obtained as a consequence. In addition to the neutron model, we consider alternative scenarios for the cosmic ray escape from the GRBs, i.e., that cosmic rays can leak from the sources. We find that the dip model, which describes the ankle in UHECR observations by the pair production dip, is strongly disfavored in combination with the internal shock model because (a) unrealistically high baryonic loadings (energy in protons versus energy in electrons/gamma-rays) are needed for the individual GRBs and (b) the prompt neutrino flux easily overshoots the corresponding neutrino bound. On the other hand, GRBs may account for the UHECRs in the ankle transition model if cosmic rays leak out from the source at the highest energies. In that case, we demonstrate that future neutrino observations can efficiently test most of the parameter space â unless the baryonic loading is much larger than previously anticipated.We reconsider the possibility that gamma-ray bursts (GRBs) are the sources of the ultra-high energy cosmic rays (UHECRs) within the internal shock model, assuming a pure proton composition of the UHECRs. For the first time, we combine the information from gamma-rays, cosmic rays, prompt neutrinos, and cosmogenic neutrinos quantitatively in a joint cosmic ray production and propagation model, and we show that the information on the cosmic energy budget can be obtained as a consequence. In addition to the neutron model, we consider alternative scenarios for the cosmic ray escape from the GRBs, i.e., that cosmic rays can leak from the sources. We find that the dip model, which describes the ankle in UHECR observations by the pair production dip, is strongly disfavored in combination with the internal shock model because a) unrealistically high baryonic loadings (energy in protons versus energy in electrons/gamma-rays) are needed for the individual GRBs and b) the prompt neutrino flux easily overshoots the corresponding neutrino bound. On the other hand, GRBs may account for the UHECRs in the ankle transition model if cosmic rays leak out from the source at the highest energies. In that case, we demonstrate that future neutrino observations can efficiently test most of the parameter space -- unless the baryonic loading is much larger than previously anticipated.Astroparticle physics 62, 66 - 91 (2014). doi:10.1016/j.astropartphys.2014.07.007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191851https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04039%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.astropartphys.2014.07.007info:eu-repo/semantics/altIdentifier/wos/WOS:000346548200009info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.1820info:eu-repo/semantics/altIdentifier/issn/1873-2852info:eu-repo/semantics/altIdentifier/issn/0927-6505info:eu-repo/grantAgreement/EC//289442
oai:bib-pubdb1.desy.de:1918562025-07-17T09:28:10ZopenaireVDBec_fundedresourcesengAblinger, A.Behring, A.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Raab, C.Round, M.Schneider, C.Wißbrock, F.Recent progress on the calculation of three-loop heavy flavor Wilson coefficients in deep-inelastic scatteringinfo:eu-repo/classification/ddc/530We report on our latest results in the calculation of the three-loop heavy flavor contributions to the Wilson coefficients in deep-inelastic scattering in the asymptotic region $Q^2 \gg m^2$. We discuss the different methods used to compute the required operator matrix elements and the corresponding Feynman integrals. These methods very recently allowed us to obtain a series of new operator matrix elements and Wilson coefficients like the flavor non-singlet and pure singlet Wilson coefficients.Proceedings of Science 2014, 041 (2014). doi:10.22323/1.211.0041info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.211.0041Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.211.0041<br/>12th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, LL2014, Weimar, Germany, 2014-04-27 - 2014-05-02SISSA2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/191856https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04044%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.3638info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.211.0041info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1918572025-07-30T12:48:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHatsuda, YasuyukiOkuyama, KazumiProbing non-perturbative effects in M-theoryinfo:eu-repo/classification/ddc/530supersymmetry: 4gauge field theory: dualityeffect: nonperturbativegauge field theory: Yang-Millsfield theory: conformaldimension: 3M-theoryAdS/CFT correspondenceexpansion 1/Nmatrix modelU(N)The AdS/CFT correspondence enables us to probe M-theory on various backgrounds from the corresponding dual gauge theories. Here we investigate in detail a three-dimensional $ U(N)\mathcal{N}=4 $ super Yang-Mills theory coupled to one adjoint hypermultiplet and N$_{f}$ fundamental hypermultiplets, which is large N dual to M-theory on $ Ad{S}_4\times {S}^7/{\mathrm{\mathbb{Z}}}_{N_f} $ . Using the localization and the Fermi-gas formulation, we explore non-perturbative corrections to the partition function. As in the ABJM theory, we find that there exists a non-trivial pole cancellation mechanism, which guarantees the theory to be well-defined, between worldsheet instantons and membrane instantons for all rational (in particular, physical or integral) values of N$_{f}$ .Journal of high energy physics 1410(10), 158 (2014). doi:10.1007/JHEP10(2014)158info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191857https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04045%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000344353000002info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP10(2014)158info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.3786info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918592025-07-17T09:25:53Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengde Florian, D.Mazzitelli, JavierMoch, Sven-OlafVogt, A.Approximate $\mathrm{N^{3}LO}$ Higgs-boson production cross section using physical-kernel constraintsinfo:eu-repo/classification/ddc/530The single-logarithmic enhancement of the physical kernel for Higgs production by gluon-gluon fusion in the heavy top-quark limit is employed to derive the leading so far unknown contributions, ln^{5,4,3}(1-z), to the N^3LO coefficient function in the threshold expansion. Also using knowledge from Higgs-exchange DIS to estimate the remaining terms not vanishing for z = m_H^2/s^hat -> 1, these results are combined with the recently completed soft + virtual contributions to provide an uncertainty band for the complete N^3LO correction. For the 2008 MSTW parton distributions these N^3LO contributions increase the cross section at 14 TeV by (10 +- 2)% and (3 +- 2.5)% for the standard choices mu_R = m_H and mu_R = m_H/2 of the renormalization scale. The remaining uncertainty arising from the hard-scattering cross sections can be quantified as no more than 5%, which is smaller than that due to the strong coupling and the parton distributions.The single-logarithmic enhancement of the physical kernel for Higgs production by gluon-gluon fusion in the heavy top-quark limit is employed to derive the leading so far unknown contributions, ln$^{5, 4, 3}$(1âz), to the N$^{3}$LO coefficient function in the threshold expansion. Also using knowledge from Higgs-exchange DIS to estimate the remaining terms not vanishing for z = m$_{H}^{2}$ /Å â 1, these results are combined with the recently completed soft + virtual contributions to provide an uncertainty band for the complete N$^{3}$LO correction. For the 2008 MSTW parton distributions these N$^{3}$LO contributions increase the cross section at 14 TeV by (10 ±2)% and (3 ±2.5)% for the standard choices μ$_{R}$ = m$_{H}$ and μ$_{R}$ = m$_{H}$ /2 of the renormalization scale. The remaining uncertainty arising from the hard-scattering cross sections can be quantified as no more than 5%, which is smaller than that due to the strong coupling and the parton distributions.Journal of high energy physics 1410(10), 176 (2014). doi:10.1007/JHEP10(2014)176info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191859https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04047%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000344652800006info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04047info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1408.6277info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP10(2014)176info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918622021-11-10T11:54:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCagnazzo, AlessandraSchomerus, VolkerTlapak, VaclavOn the Spectrum of Superspheressigma model: conformalzero mode: spectrumoperator: vertexgradient: highoperator: BPSfield theory: conformalGross-Neveu modelcoset spacedualityWess-Zumino-Witten modelAdS/CFT correspondenceanomalous dimensionsuperspaceSigma models on coset superspaces, such as odd dimensional superspheres, play an important role in physics and in particular the AdS/CFT correspondence. In this work we apply recent general results on the spectrum of coset space models and on supergroup WZNW models to study the conformal sigma model with target space S$^{3|2}$. We construct its vertex operators and provide explicit formulas for their anomalous dimensions, at least to leading order in the sigma model coupling. The results are used to revisit a non-perturbative duality between the supersphere and the OSP(4|2) Gross-Neveu model that was conjectured by Candu and Saleur. With the help of powerful all-loop results for $ \frac{1}{2}\mathrm{B}\mathrm{P}\mathrm{S} $ operators in the Gross-Neveu model we are able to recover the entire zero mode spectrum of the sigma model at a certain finite value of the Gross-Neveu coupling. In addition, we argue that the sigma model constraints and equations of motion are implemented correctly in the dual Gross-Neveu description. On the other hand, high(er) gradient operators of the sigma model are not all accounted for. It is possible that this discrepancy is related to an instability from high gradient operators that has previously been observed in the context of Anderson localization.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191862https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04050%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1408.6838info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918632021-11-10T11:54:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Behring, A.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Raab, C.Round, M.Schneider, S.Wißbrock, F.3-loop heavy flavor Wilson coefficients in deep-inelastic scatteringWe present our most recent results on the calculation of the heavy flavor contributions to deep-inelastic scattering at 3-loop order in the large $Q^2$ limit, where the heavy flavor Wilson coefficients are known to factorize into light flavor Wilson coefficients and massive operator matrix elements. We describe the different techniques employed for the calculation and show the results in the case of the heavy flavor non-singlet and pure singlet contributions to the structure function $F_2(x,Q^2)$.4 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion37th International Conference on High Energy Physics, ICHEP 2014, Valencia, Spain, 2014-07-02 - 2014-07-092014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191863https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04051%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.1804info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1918642021-11-10T11:54:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Round, M.Schneider, C.3-loop Massive $O(T_F^2)$ Contributions to the DIS Operator Matrix Element $A_{gg}$Contributions to heavy flavour transition matrix elements in the variable flavour number scheme are considered at 3-loop order. In particular a calculation of the diagrams with two equal masses that contribute to the massive operator matrix element $A_{gg,Q}^{(3)}$ is performed. In the Mellin space result one finds finite nested binomial sums. In $x$-space these sums correspond to iterated integrals over an alphabet containing also square-root valued letters.4 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion17th International Conference on Quantum Chromodynamics, QCD 14, Montpellier, France, 2014-06-30 - 2014-07-042014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191864https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04052%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.1435info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1918662025-07-17T09:28:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGuzzi, MarcoLipka, KaterinaMoch, Sven-OlafDifferential cross sections for top pair production at the LHCinfo:eu-repo/classification/ddc/530top: pair productionparton: distribution functionheavy quark: pair productiontop: final statequantum chromodynamics: perturbation theoryresummation: thresholdhigher-order: 2CERN LHC Colldifferential cross sectiontransverse momentumhadron hadroncomputerrapidityATLASCMSWe present results of phenomenological studies for top-qua rk pair production at the LHC at the center of mass energy √ S = 7 TeV. The transverse momentum and rapidity distributions f or final- state top quarks are calculated in perturbative QCD at appro ximate next-to-next-to-leading order O ( α 4 s ) by using methods of threshold resummation beyond the leadin g logarithmic accuracy. The theoretical predictions are obtained by using the computer code D IFF T OP and are compared to recent measurements by the ATLAS and CMS collaborations. D IFFTOP can be employed in the general case of heavy-quark pair production at hadron-hadr on colliders and provides a basis for applications in QCD analyses for parton distribution funct ions determination.Proceedings of Science 2014, 4 (2014). doi:10.22323/1.203.0052info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion22nd International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2014, Warsaw, Poland, 2014-04-28 - 2014-05-02SISSA2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/191866https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04054%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.203.0052info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.0444info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918672025-07-30T12:48:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMoch, Sven-OlafVermaseren, J. A. M.Vogt, A.The Three-Loop Splitting Functions in QCD: The Helicity-Dependent Caseinfo:eu-repo/classification/ddc/530We present the next-to-next-to-leading order (NNLO) contributions to the main splitting functions for the evolution of longitudinally polarized parton densities of hadrons in perturbative QCD. The quark-quark and gluon-quark splitting functions have been obtained by extending our previous all Mellin-N calculations to the structure function g_1 in electromagnetic deep-inelastic scattering (DIS). Their quark-gluon and gluon-gluon counterparts have been derived using third-order fixed-N calculations of structure functions in graviton-exchange DIS, relations to the unpolarized case and mathematical tools for systems of Diophantine equations. The NNLO corrections to the splitting functions are small outside the region of small momentum fractions x where they exhibit a large double-logarithmic enhancement, yet the corrections to the evolution of the parton densities can be unproblematic down to at least x about 10^{-4}.We present the next-to-next-to-leading order (NNLO) contributions to the main splitting functions for the evolution of longitudinally polarized parton densities of hadrons in perturbative QCD. The quarkâquark and gluonâquark splitting functions have been obtained by extending our previous all Mellin- N calculations to the structure function g1 in electromagnetic deep-inelastic scattering (DIS). Their quarkâgluon and gluonâgluon counterparts have been derived using third-order fixed- N calculations of structure functions in graviton-exchange DIS, relations to the unpolarized case and mathematical tools for systems of Diophantine equations. The NNLO corrections to the splitting functions are small outside the region of small momentum fractions x where they exhibit a large double-logarithmic enhancement, yet the corrections to the evolution of the parton densities can be unproblematic down to at least xâ10â4 .Nuclear physics <Amsterdam> / B 889, 351 - 400 (2014). doi:10.1016/j.nuclphysb.2014.10.016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191867https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04055%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04055info:eu-repo/semantics/altIdentifier/wos/WOS:000347016900017info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.5131info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.10.016info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1918722026-03-10T09:26:11Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNavitski, A.Elsen, E.Steder, L.Tamashevich, Y.Wenskat, MarcFoster, BrianIversen, J.Laasch, R.Matheisen, A.Reschke, D.Schaffran, J.Singer, X.Singer, W.ILC HiGrade cavities as a tool of quality control for European XFELPart of the quality control (QC) and quality assurance(QA) scheme applied for achievement of the designedparameters of the European XFEL cavities is presented.Results of the first tests of QC cavities from the “ILCHiGradeprogram” as well as examples of a feedback tothe cavity fabrication during the ramping up phase ispresented.Geneva : JACOW 4 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion16th International Conference on RF Superconductivity, SRF 2013, Paris, France, 2013-09-23 - 2013-09-27JACOW2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/191872https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04060%22Researchersinfo:eu-repo/grantAgreement/EC//283745info:eu-repo/grantAgreement/EC//206711
oai:bib-pubdb1.desy.de:1924822025-07-17T09:27:10Zec_fundedresourcesopenaireVDBengChwiej, J.Gabrys, H.Janeczko, K.Kutorasinska, J.Gzielo-Jurek, K.Matusiak, K.Appel, K.Setkowicz, Z.Elemental anomalies in the hippocampal formation after repetitive electrical stimulation: an X-ray fluorescence microscopy studyinfo:eu-repo/classification/ddc/540Our previous studies carried out on the pilocarpine model of seizures showed that highly resolved elemental analysis might be very helpful in the investigation of processes involved in the pathogenesis of epilepsy, such as excitotoxicity or mossy fiber sprouting. In this study, the changes in elemental composition that occurred in the hippocampal formation in the electrical kindling model of seizures were examined to determine the mechanisms responsible for the phenomenon of kindling and spontaneous seizure activity that may occur in this animal model. X-ray fluorescence microscopy was applied for topographic and quantitative analysis of selected elements in tissues taken from rats subjected to repetitive transauricular electroshocks (ES) and controls (N). The detailed comparisons were carried out for sectors 1 and 3 of the Ammon’s horn (CA1 and CA3, respectively), the dentate gyrus (DG) and hilus of DG. The obtained results showed only one statistically significant difference between ES and N groups, namely a higher level of Fe was noticed in CA3 region in the kindled animals. However, further analysis of correlations between the elemental levels and quantitative parameters describing electroshock-induced tonic and clonic seizures showed that the areal densities of some elements (Ca, Cu, Zn) strongly depended on the progress of kindling process. The areal density of Cu in CA1 decreased with the cumulative (totaled over 21 stimulation days) intensity and duration of electroshock-induced tonic seizures while Zn level in the hilus of DG was positively correlated with the duration and intensity of both tonic and clonic seizures.Journal of biological inorganic chemistry 19(7), 1209 - 1220 (2014). doi:10.1007/s00775-014-1177-7info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192482https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04079%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25027680info:eu-repo/semantics/altIdentifier/issn/0949-8257info:eu-repo/semantics/altIdentifier/issn/1432-1327info:eu-repo/semantics/altIdentifier/doi/10.1007/s00775-014-1177-7info:eu-repo/semantics/altIdentifier/wos/WOS:000342438100013info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1924862025-07-17T09:26:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuchmüller, W.Domcke, V.Kamada, K.Schmitz, K.Hybrid inflation in the complex planeinfo:eu-repo/classification/ddc/530inflation: hybridsupersymmetry: symmetry breakingscale: grand unified theorysupergravity: correctionfluctuation: primordialrotation: invariancespontaneous symmetry breakingcritical phenomenaboundary conditioncosmological modelpower spectrumperturbationdark mattertrajectoryinflatonentropyF-termSupersymmetric hybrid inflation is an exquisite framework to connect inflationary cosmology to particle physics at the scale of grand unification. Ending in a phase transition associated with spontaneous symmetry breaking, it can naturally explain the generation of entropy, matter and dark matter. Coupling F-term hybrid inflation to soft supersymmetry breaking distorts the rotational invariance in the complex inflaton plane — an important fact, which has been neglected in all previous studies. Based on the δ N formalism, we analyze the cosmological perturbations for the first time in the full two-field model, also taking into account the fast-roll dynamics at and after the end of inflation. As a consequence of the two-field nature of hybrid inflation, the predictions for the primordial fluctuations depend not only on the parameters of the Lagrangian, but are eventually fixed by the choice of the inflationary trajectory. Recognizing hybrid inflation as a two-field model resolves two shortcomings often times attributed to it: the fine-tuning problem of the initial conditions is greatly relaxed and a spectral index in accordance with the PLANCK data can be achieved in a large part of the parameter space without the aid of supergravity corrections. Our analysis can be easily generalized to other (including large-field) scenarios of inflation in which soft supersymmetry breaking transforms an initially single-field model into a multi-field model.Journal of cosmology and astroparticle physics 2014(07), 054 (2014). doi:10.1088/1475-7516/2014/07/054info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192486https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04083%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2014/07/054info:eu-repo/semantics/altIdentifier/wos/WOS:000339802700055info:eu-repo/semantics/altIdentifier/issn/1475-7516info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04083info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1404.1832info:eu-repo/grantAgreement/EC//289442
oai:bib-pubdb1.desy.de:1924902025-07-30T12:48:17Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengIsachenkov, MikhailKirsch, IngoSchomerus, VolkerChiral primaries in strange metalsinfo:eu-repo/classification/ddc/530algebra: chiralalgebra: conformalduality: holographysymmetry: conformaldensity: highmetalquantum chromodynamicscoset spacetoy modelinfraredIt was suggested recently that the study of 1-dimensional QCD with fermions in the adjoint representation could lead to an interesting toy model for strange metals and their holographic formulation. In the high density regime, the infrared physics of this theory is described by a constrained free fermion theory with an emergent N=(2,2) superconformal symmetry. In order to narrow the choice of potential holographic duals, we initiate a systematic search for chiral primaries in this model. We argue that the bosonic part of the superconformal algebra can be extended to a coset chiral algebra of the form WN=SO(2N2−2)1/SU(N)2N . In terms of this algebra the spectrum of the low energy theory decomposes into a finite number of sectors which are parametrized by special necklaces. We compute the corresponding characters and partition functions and determine the set of chiral primaries for N≤5 .Nuclear physics <Amsterdam> / B 885, 679 - 712 (2014). doi:10.1016/j.nuclphysb.2014.06.004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192490https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04087%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04087info:eu-repo/semantics/altIdentifier/wos/WOS:000339598300031info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.06.004info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.6857info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1925022025-07-30T12:48:51Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, J.Schomerus, V.Sprenger, M.Heptagon amplitude in the multi-Regge regimeinfo:eu-repo/classification/ddc/530gauge field theory: Yang-Mills: supersymmetrysupersymmetry: 4gluon: Reggeenergy: highapproximation: strong couplingmulti-Reggescattering amplitudeanti-de SitterintegrabilityBethe ansatzAs we have shown in previous work, the high energy limit of scattering amplitudes in $ \mathcal{N} $ = 4 supersymmetric Yang-Mills theory at strong coupling corresponds to the infrared limit of the 1-dimensional quantum integrable system that solves minimal area problems in AdS$_{5}$. This insight can be developed into a systematic algorithm to compute the strong coupling limit of amplitudes in the multi-Regge regime through the solution of auxiliary Bethe Ansatz equations. We apply this procedure to compute the scattering amplitude for n = 7 external gluons in different multi-Regge regions at infinite ’t Hooft coupling. Our formulas are remarkably consistent with the expected form of 7-gluon Regge cut contributions in perturbative gauge theory. A full description of the general algorithm and a derivation of results will be given in a forthcoming paper.Journal of high energy physics 2014(10), 67 (2014). doi:10.1007/JHEP10(2014)067info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192502https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04099%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000343820000001info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04099info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP10(2014)067info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1925112025-07-30T12:48:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAoki, S.Aoki, Y.Kaneko, T.Laiho, J.Lellouch, L.Leutwyler, H.Lubicz, V.Lunghi, E.Necco, S.Onogi, T.Pena, C.Sachrajda, C. T.Bernard, C.Sharpe, S. R.Simula, S.Sommer, R.Van de Water, R. S.Vladikas, A.Wenger, U.Wittig, H.Colangelo, GilbertoBlum, T.Della Morte, M.Dürr, S.El-Khadra, A. X.Fukaya, H.Horsley, R.Jüttner, A.Review of lattice results concerning low-energy particle physicsinfo:eu-repo/classification/ddc/530We review lattice results related to pion, kaon, D- and B-meson physics with the aim of making them easily accessible to the particle physics community. More specifically, we report on the determination of the light-quark masses, the form factor f+(0), arising in semileptonic K -> pi transition at zero momentum transfer, as well as the decay constant ratio fK/fpi of decay constants and its consequences for the CKM matrix elements Vus and Vud. Furthermore, we describe the results obtained on the lattice for some of the low-energy constants of SU(2)LxSU(2)R and SU(3)LxSU(3)R Chiral Perturbation Theory and review the determination of the BK parameter of neutral kaon mixing. The inclusion of heavy-quark quantities significantly expands the FLAG scope with respect to the previous review. Therefore, for this review, we focus on D- and B-meson decay constants, form factors, and mixing parameters, since these are most relevant for the determination of CKM matrix elements and the global CKM unitarity-triangle fit.The European physical journal / C 74(9), 2890 (2014). doi:10.1140/epjc/s10052-014-2890-7info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192511https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04108%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.8555info:eu-repo/semantics/altIdentifier/wos/WOS:000350140900001info:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-014-2890-7info:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/grantAgreement/EC//279757info:eu-repo/grantAgreement/EC//238353
oai:bib-pubdb1.desy.de:1925132021-11-10T11:54:49Zec_fundedresourcesdriverVDBopen_accessopenaireengDiener, RalfPCMAG Solenoid Upgrade at DESY Testbeam Area T24/1info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA 3rd Annual Meeting, Vienna, Vienna University of Technology, Austria, 2014-03-26 - 2014-03-282014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192513https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04110%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1925152021-11-10T11:54:49Zec_fundedresourcesVDBopenaireengDiener, RalfLCTPC Setup at the DESY Testbeaminfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAmericas Workshop on Linear Colliders 2014, AWLC14, Batavia, Fermi National Accelerator Laboratory, USA, 2014-05-12 - 2014-05-162014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192515https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04112%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:1925182021-11-10T11:54:53Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGuzzi, MarcoLipka, KaterinaMoch, Sven-OlafTop-quark pair production at hadron colliders: differential cross section and phenomenological applications with DiffTopThe results of phenomenological studies of top-quark pair production in proton-proton collisions are presented. Differential cross sections are calculated in perturbative QCD at approximate next-to-next-to-leading order ${\cal O}(\alpha_s^4)$ by using methods of threshold resummation beyond the leading logarithmic accuracy. Predictions for the single-particle inclusive kinematics are presented for transverse momentum and rapidity distributions of final-state top quarks. Uncertainties related to the description of proton structure, top-quark mass and strong coupling constant are investigated in detail. The results are compared to the recent measurements by the ATLAS and CMS collaborations at the LHC at the center of mass energy of 7 TeV. The calculation presented here is implemented in the computer code \textsc{Difftop} and can be applied to the general case of heavy-quark pair production at hadron-hadron colliders. For the first time, a fit of parton distribution functions at NNLO is performed by using the differential cross sections of top-quark pair production together with other data sets. The impact of the top-pair production on the precision of the gluon distribution at high scales is illustrated.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192518https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04115%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.0386info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1925222025-07-17T09:25:51Zdnbdeliveryec_fundedresourcesdriveropenaireopen_accessVDBengAblinger, J.Behring, A.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Round, M.Schneider, C.Wißbrock, F.The 3-loop non-singlet heavy flavor contributions and anomalous dimensions for the structure function ${F}_{2}\left(x,{Q}^{2}\right)$ and transversityinfo:eu-repo/classification/ddc/530We calculate the massive flavor non-singlet Wilson coefficient for the heavy flavor contributions to the structure function F2(x,Q2)F2(x,Q2) in the asymptotic region Q2≫m2Q2≫m2 and the associated operator matrix element View the MathML sourceAqq,Q(3),NS(N) to 3-loop order in Quantum Chromodynamics at general values of the Mellin variable N . This matrix element is associated with the vector current and axial vector current for the even and the odd moments N , respectively. We also calculate the corresponding operator matrix elements for transversity, compute the contributions to the 3-loop anomalous dimensions to O(NF)O(NF) and compare to results in the literature. The 3-loop matching of the flavor non-singlet distribution in the variable flavor number scheme is derived. All results can be expressed in terms of nested harmonic sums in N space and harmonic polylogarithms in x -space. Numerical results are presented for the non-singlet charm quark contribution to F2(x,Q2)F2(x,Q2).Nuclear physics <Amsterdam> / B 886, 733 - 823 (2014). doi:10.1016/j.nuclphysb.2014.07.010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192522https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04119%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04119info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/wos/WOS:000341344500028info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.07.010info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1925242025-07-17T09:26:24ZdnbdeliveryVDBdriveropenaireopen_accessec_fundedresourcesengBehring, A.Bierenbaum, I.Blümlein, J.De Freitas, A.Klein, S.Wißbrock, F.The logarithmic contributions to the $\cal{O}(\alpha _s^3)$ asymptotic massive Wilson coefficients and operator matrix elements in deeply inelastic scatteringinfo:eu-repo/classification/ddc/530We calculate the logarithmic contributions to the massive Wilson coefficients for deep-inelastic scattering in the asymptotic region $Q^2 \gg m^2$ to 3-loop order in the fixed-flavor number scheme and present the corresponding expressions for the massive operator matrix elements needed in the variable flavor number scheme. Explicit expressions are given both in Mellin-$N$ space and $z$-space.The European physical journal / C 74(9), 3033 (2014). doi:10.1140/epjc/s10052-014-3033-xinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192524https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04121%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25937815info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-014-3033-xinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1403.6356info:eu-repo/semantics/altIdentifier/wos/WOS:000342456500001info:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/grantAgreement/EC//257638info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//264564
oai:bib-pubdb1.desy.de:1925552025-07-17T09:27:53Zdnbdeliveryec_fundedresourcesdriveropenaireopen_accessVDBengGlock, Hans-WalterShinton, Ian R. R.Baboi, Nicoleta-IonelaJones, Roger M.van Rienen, UrsulaFlisgen, ThomasZhang, PeiScattering parameters of the 3.9 GHz accelerating module in a free-electron laser linac: a rigorous comparison between simulations and measurementsinfo:eu-repo/classification/ddc/530This article presents a comparison between measured and simulated scattering parameters in a widefrequency interval for the third harmonic accelerating module ACC39 in the linear accelerator FLASH,located at DESY in Hamburg/Germany. ACC39 is a cryomodule housing four superconducting 3.9 GHzaccelerating cavities. Due to the special shape of the cavities (in particular its end cells and the beam pipes)in ACC39, the electromagnetic field in the module is, in many frequency ranges, coupled from one cavity tothe next. Therefore, the scattering parameters are determined by the entire string and not solely by theindividual cavities. This makes the determination of the scattering properties demanding. As far as theauthors can determine, this paper shows for the first time a direct comparison between state-of-the-artsimulations and measurements of rf properties of long, complex, and asymmetric structures over a widefrequency band. Taking into account the complexity of the system and various geometrical unknowns, theagreement between experimental measurements and simulations is remarkably good for several distinctmeasurements, although a variety of effects (e.g. cavity deviations from the ideal shape or interactions withnot modeled parts of the structure) is not considered in the computer simulation. After a short introduction,the paper provides detailed descriptions of simulations and experimental measurements performed at themodule. In this context, the estimation of the cable properties is discussed as well. As a central part of thearticle, the comparison between measured and simulated transmission spectra and quality factors ispresented. This study represents one of the first detailed comparisons between simulations andmeasurements for a coupled accelerator cavity system.Physical review accelerators and beams 17(2), 022003 (2014). doi:10.1103/PhysRevSTAB.17.022003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192555https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04145%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevSTAB.17.022003info:eu-repo/semantics/altIdentifier/wos/WOS:000332178000004info:eu-repo/semantics/altIdentifier/issn/1098-4402info:eu-repo/grantAgreement/EC//227579
oai:bib-pubdb1.desy.de:1926242021-11-10T11:55:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, J.Schomerus, V.Sprenger, M.The Bethe Roots of Regge Cuts in Strongly Coupled N=4 SYM Theorysupersymmetry: 4kinematics: multi-Reggestrong couplingintegrabilityscatteringinfraredstringAdS(5) x S(5)gluonReggeBethe ansatzWe describe a general algorithm for the computation of the remainder function for n-gluon scattering in multi-Regge kinematics for strongly coupled planar N=4 super Yang-Mills theory. This regime is accessible through the infrared physics of an auxiliary quantum integrable system describing strings in AdS5xS5. Explicit formulas are presented for n=6 and n=7 external gluons. Our results are consistent with expectations from perturbative gauge theory. This paper comprises the technical details for the results announced in arXiv:1405.3658 .info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192624https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04206%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.2594info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1926322025-07-30T12:49:14Zec_fundedresourcesVDBopenaireengSchwaighofer, EmanuelClemens, HelmutLindemann, JannyStark, AndreasMayer, SveaHot-working behavior of an advanced intermetallic multi-phase $\gamma$-TiAl based alloyinfo:eu-repo/classification/ddc/600New high-performance engine concepts for aerospace and automotive application enforce the development of lightweight intermetallic γ-TiAl based alloys with increased high-temperature capability above 750 °C. Besides an increased creep resistance, the alloy system must exhibit sufficient hot-workability. However, the majority of current high-creep resistant γ-TiAl based alloys suffer from poor workability, whereby grain refinement and microstructure control during hot-working are key factors to ensure a final microstructure with sufficient ductility and tolerance against brittle failure below the brittle-to-ductile transition temperature. Therefore, a new and advanced β-solidifying γ-TiAl based alloy, a so-called TNM alloy with a composition of Ti–43Al–4Nb–1Mo–0.1B (at%) and minor additions of C and Si, is investigated by means of uniaxial compressive hot-deformation tests performed with a Gleeble 3500 simulator within a temperature range of 1150–1300 °C and a strain rate regime of 0.005–0.5 s−1 up to a true deformation of 0.9. The occurring mechanisms during hot-working were decoded by ensuing constitutive modeling of the flow curves by a novel phase field region-specific surface fitting approach via a hyperbolic-sine law as well as by evaluation through processing maps combined with microstructural post-analysis to determine a safe hot-working window of the refined TNM alloy. Complementary, in situ high energy X-ray diffraction experiments in combination with an adapted quenching and deformation dilatometer were conducted for a deeper insight about the deformation behavior of the alloy, i.e. phase fractions and texture evolution as well as temperature uncertainties arising during isothermal and non-isothermal compression. It was found that the presence of β-phase and the contribution of particle stimulated nucleation of ζ-Ti5Si3 silicides and h-type carbides Ti2AlC enhance the dynamic recrystallization behavior during deformation within the (α+β) phase field region, leading to refined and nearly texture-free α/α2-grains. In conclusion, robust deformation parameters for the refinement of critical microstructural defects could be defined for the investigated multi-phase γ-TiAl based alloy.Materials science and engineering / A 614, 297 - 310 (2014). doi:10.1016/j.msea.2014.07.040info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192632https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04214%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-4936info:eu-repo/semantics/altIdentifier/doi/10.1016/j.msea.2014.07.040info:eu-repo/semantics/altIdentifier/wos/WOS:000342245800037info:eu-repo/semantics/altIdentifier/issn/0921-5093info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:1927002025-07-30T12:49:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuchmüller, W.Domcke, V.Schmitz, K.The chaotic regime of D-term inflationinfo:eu-repo/classification/ddc/530inflation: D-terminflation: chaosinflaton: potentialinflaton: couplinginflation: hybridfluctuation: quantumfalse vacuum: decaydecoherence: timeenergy: densityscale: Planckslow-roll approximationtime dependenceWe consider D-term inflation for small couplings of the inflaton to matter fields. Standard hybrid inflation then ends at a critical value of the inflaton field that exceeds the Planck mass. During the subsequent waterfall transition the inflaton continues its slow-roll motion, whereas the waterfall field rapidly grows by quantum fluctuations. Beyond the decoherence time, the waterfall field becomes classical and approaches a time-dependent minimum, which is determined by the value of the inflaton field and the self-interaction of the waterfall field. During the final stage of inflation, the effective inflaton potential is essentially quadratic, which leads to the standard predictions of chaotic inflation. The model illustrates how the decay of a false vacuum of GUT-scale energy density can end in a period of `chaotic inflation'.Journal of cosmology and astroparticle physics 2014(11), 006 (2014). doi:10.1088/1475-7516/2014/11/006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192700https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04243%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2014/11/006info:eu-repo/semantics/altIdentifier/wos/WOS:000346105300007info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.6300info:eu-repo/semantics/altIdentifier/issn/1475-7516info:eu-repo/grantAgreement/EC//289442
oai:bib-pubdb1.desy.de:1927022025-07-30T12:49:17Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCzakon, MichalMitov, AlexanderPapucci, MicheleRuderman, Joshua T.Weiler, AndreasClosing the stop gapinfo:eu-repo/classification/ddc/550supersymmetry: conservation lawR paritytop: massstop: massscale: electroweak interactionsupersymmetrygapneutralinostatisticssquarkLight stops are a hallmark of the most natural realizations of weak-scale supersymmetry. While stops have been extensively searched for, there remain open gaps around and below the top mass, due to similarities of stop and top signals with current statistics. We propose a new fast-track avenue to improve light stop searches for R-parity conserving supersymmetry, by comparing top cross section measurements to the theoretical prediction. Stop masses below ~ 180 GeV can now be ruled out for a light neutralino. The possibility of a stop signal contaminating the top mass measurement is also briefly addressed.Physical review letters 113(20), 201803 (2014). doi:10.1103/PhysRevLett.113.201803info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192702https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04245%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.113.201803info:eu-repo/semantics/altIdentifier/pmid/pmid:25432037info:eu-repo/semantics/altIdentifier/wos/WOS:000349664000004info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.1043info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/semantics/altIdentifier/issn/1079-7114info:eu-repo/grantAgreement/EC//291377
oai:bib-pubdb1.desy.de:1927182025-07-17T09:25:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlekhin, S.Blümlein, J.Moch, S.The ABM parton distributions tuned to LHC datainfo:eu-repo/classification/ddc/530We present a global fit of parton distributions at next-to-next-to-leading order (NNLO) in QCD. The fit is based on the world data for deep-inelastic scattering, fixed-target data for the Drell-Yan process and includes, for the first time, data from the Large Hadron Collider (LHC) for the Drell-Yan process and the hadroproduction of top-quark pairs. The analysis applies the fixed-flavor number scheme for $n_{f}$=3, 4, 5, uses the $\overline{MS}$ scheme for the strong coupling αs and the heavy-quark masses and keeps full account of the correlations among all nonperturbative parameters. At NNLO this returns the values of $\alpha_s(M_{Z})$=0.1132 $\pm$ 0.0011 and mt(pole)=171.2 $\pm$ 2.4 GeV for the top-quark pole mass. The fit results are used to compute benchmark cross sections for the Higgs production at the LHC to NNLO accuracy. We compare our results to those obtained by other groups and show that differences can be linked to different theoretical descriptions of the underlying physical processes.Physical review / D 89(5), 054028 (2014). doi:10.1103/PhysRevD.89.054028info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192718https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04260%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.89.054028info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.3059info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/semantics/altIdentifier/wos/WOS:000334305300003info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1927192025-07-30T12:49:36Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFallahi, AryaKärtner, FranzField-based DGTD/PIC technique for general and stable simulation of interaction between light and electron bunchesinfo:eu-repo/classification/ddc/530We introduce a hybrid technique based on the discontinuous Galerkin time domain (DGTD) and the particle in cell (PIC) simulation methods for the analysis of interaction between light and charged particles. The DGTD algorithm is a three-dimensional, dual-field and fully explicit method for efficiently solving Maxwell equations in the time domain on unstructured grids. On the other hand, the PIC algorithm is a versatile technique for the simulation of charged particles in an electromagnetic field. This paper introduces a novel strategy for combining both methods to solve for the electron motion and field distribution when an optical beam interacts with an electron bunch in a very general geometry. The developed software offers a complete and stable numerical solution of the problem for arbitrary charge and field distributions in the time domain on unstructured grids. For this purpose, an advanced search algorithm is developed for fast calculation of field data at charge points and for later importing to the PIC simulations. In addition, we propose a field-based coupling between the two methods resulting in a stable and precise time marching scheme for both fields and charged particle motion. To benchmark the solver, some examples are numerically solved and compared with analytical solutions. Eventually, the developed software is utilized to simulate the field emission from a flat metal plate and a silicon nano-tip. In the future, we will use this technique for the simulation and design of ultrafast compact x-ray sources.Journal of physics / B 47(23), 234015 (2014). doi:10.1088/0953-4075/47/23/234015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-11-24DEhttps://bib-pubdb1.desy.de/record/192719https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04261%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0953-4075/47/23/234015info:eu-repo/semantics/altIdentifier/wos/WOS:000345592900016info:eu-repo/semantics/altIdentifier/issn/0368-3508info:eu-repo/semantics/altIdentifier/issn/1361-6455info:eu-repo/semantics/altIdentifier/issn/0953-4075info:eu-repo/semantics/altIdentifier/issn/0022-3700info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:1927262021-11-10T11:55:48Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAblinger, J.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, A.Round, M.Schneider, C.Wißbrock, F.3-Loop Heavy Flavor Corrections in Deep-Inelastic Scattering with Two Heavy Quark LinesWe consider gluonic contributions to the heavy flavor Wilson coefficients at 3-loop order in QCD with two heavy quark lines in the asymptotic region $Q^2 \gg m_{1(2)}^2$. Here we report on the complete result in the case of two equal masses $m_1 = m_2$ for the massive operator matrix element $A_{gg,Q}^{(3)}$, which contributes to the corresponding heavy flavor transition matrix element in the variable flavor number scheme. Nested finite binomial sums and iterated integrals over square-root valued alphabets emerge in the result for this quantity in $N$ and $x$-space, respectively. We also present results for the case of two unequal masses for the flavor non-singlet OMEs and on the scalar integrals ic case of $A_{gg,Q}^{(3)}$, which were calculated without a further approximation. The graphs can be expressed by finite nested binomial sums over generalized harmonic sums, the alphabet of which contains rational letters in the ratio $\eta = m_1^2/m_2^2$.10 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion12th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, LL2014, Weimar, Germany, 2014-04-27 - 2014-05-022014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192726https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04265%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.2821info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:1927352025-07-30T12:49:42Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGrozin, AndreyHenn, Johannes M.Korchemsky, Gregory P.Marquard, PeterThe $n_{f}$ terms of the three-loop cusp anomalous dimension in QCDinfo:eu-repo/classification/ddc/530In this talk we present the result for the $n_f$ dependent piece of the three-loop cusp anomalous dimension in QCD. Remarkably, it is parametrized by the same simple functions appearing in analogous anomalous dimensions in ${\mathcal N}=4$ SYM at one and two loops. We also compute all required master integrals using a recently proposed refinement of the differential equation method. The analytic results are expressed in terms of harmonic polylogarithms of uniform weight.Proceedings of Science (2014). doi:10.22323/1.211.0016info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.211.0016Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014) - Sissa Medialab Trieste, Italy, 2014. - ISBN - doi:10.22323/1.211.0016<br/>12th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, LL2014 , Weimar, Germany, 2014-04-27 - 2014-05-02SISSA2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192735https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04274%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.7828info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.211.0016info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1927362021-11-10T11:55:51Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGrozin, AndreyHenn, Johannes M.Korchemsky, Gregory P.Marquard, PeterThe $n_{f}$ terms of the three-loop cusp anomalous dimension in QCDIn this talk we present the result for the $n_f$ dependent piece of the three-loop cusp anomalous dimension in QCD. Remarkably, it is parametrized by the same simple functions appearing in analogous anomalous dimensions in ${\mathcal N}=4$ SYM at one and two loops. We also compute all required master integrals using a recently proposed refinement of the differential equation method. The analytic results are expressed in terms of harmonic polylogarithms of uniform weight.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192736https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04275%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.7828info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1927702021-11-10T11:55:52Zec_fundedresourcesVDBopenaireengAlekhin, S.Bluemlein, J.Caminada, L.Lipka, K.Lohwasser, K.Moch, S.Petti, R.Placakyte, R.Nucleon PDF separation with the collider and fixed-target data6 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion22nd International Workshop on Deep-Inelastic Scattering and Related Subjects, Warsaw, Poland, 2014-04-28 - 2014-05-022014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192770https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04299%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.7007info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:1928032025-07-17T09:28:06Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMichalik, S.Bednarcik, J.Pawlik, P.Matija, R.Sovak, P.The Structural Stability of Soft Magnetic Fe-Co-Zr-W-B Metallic Glasses Investigated by the in-situ X-ray Diffractioninfo:eu-repo/classification/ddc/530Acta physica Polonica / A 126(1), 66 - 67 (2014). doi:10.12693/APhysPolA.126.66info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAcad. Inst.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192803https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04329%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.12693/APhysPolA.126.66info:eu-repo/semantics/altIdentifier/issn/0587-4246info:eu-repo/semantics/altIdentifier/wos/WOS:000339833100030info:eu-repo/semantics/altIdentifier/issn/1898-794Xinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1929392025-09-30T13:00:52Zec_fundedresourcesVDBopenaireengValant, MatjazArcon, IztokMikulska, IuliiaLisjak, DarjaCation Order-Disorder Transition in Fe-Doped $6H-BaTiO_{3}$ for Dilute Room-Temperature Ferromagnetisminfo:eu-repo/classification/ddc/540Understanding the fundamental spin coupling mechanisms indilute magnetic oxides is not possible without exact atomistic understanding ofthe solids. This is even more important for few systems that show diluteferromagnetism at room temperature and could potentially be used in spintronicand multiferroic technologies. Here, we show the first known example of a cationordering in hexagonal 6H-perovskites. Fe3+ ions in Fe-doped 6H-BaTiO3 areinitially randomly distributed over two Ti4+ crystallographic sites but can be, by aprolonged heat treatment, ordered onto one of the sites. The cation ordering isdriven by reduction in the electrostatic repulsion, which occurs when Fe3+substitutes the highly charged Ti4+ ions that are located at unusual proximity toeach other. We show that such a continuous order−disorder transition isassociated with induction of the room-temperature dilute ferromagnetism.Chemistry of materials 25(17), 3544 - 3550 (2013). doi:10.1021/cm402353tinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Chemical Society2013info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192939https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04423%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000330097900019info:eu-repo/semantics/altIdentifier/issn/0897-4756info:eu-repo/semantics/altIdentifier/issn/1520-5002info:eu-repo/semantics/altIdentifier/doi/10.1021/cm402353tinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1929402021-11-10T11:56:30Zec_fundedresourcesdriverVDBopen_accessopenaireengArcon, IztokDominko, RobertGiuliana, AquilantManu, PatelLorenzo, StievanoIn-operando XAS analysis of Li-ion and Li-sulphur batteriesinfo:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionLecture at Seminar (), 2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/192940https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04424%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//314515
oai:bib-pubdb1.desy.de:1929692025-07-30T12:50:20Zec_fundedresourcesVDBopenaireengDarul, JolantaLathe, ChristianPiszora, PawełHooked on switch: strain-managed cooperative Jahn-Teller effect in $Li_{ 0.95}Mn_{2.05}O_{4}$ spinelinfo:eu-repo/classification/ddc/540RSC Advances 4(110), 65205 - 65212 (2014). doi:10.1039/C4RA11533Cinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRSC Publishing2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/192969https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04433%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1039/C4RA11533Cinfo:eu-repo/semantics/altIdentifier/issn/2046-2069info:eu-repo/semantics/altIdentifier/wos/WOS:000345826100098info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:1930092021-11-10T11:57:21Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengH.E.S.S. CollaborationAbramowski, A.Becherini, Y.Kieffer, M.Klepser, S.Klochkov, D.Kluźniak, W.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krueger, PeterBecker Tjus, J.Laffon, H.Lamanna, G.Lefaucheur, J.Lefranc, V.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lohse, T.Lopatin, A.Lu, C.-C.Berge, D.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Bernhard, S.Meyer, ManuelMitchell, AlisonModerski, R.Mohamed, M.Morå, K.Moulin, E.Murach, T.de Naurois, M.Niemiec, J.Nolan, S. J.Bernloehr, K.Oakes, L.Odaka, H.Ohm, S.Opitz, B.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Paz Arribas, M.Pekeur, N. W.Birsin, E.Pelletier, G.Perez, J.Petrucci, P.-O.Peyaud, B.Pita, S.Poon, H.Puehlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Biteau, J.Reichardt, I.Reimer, A.Reimer, O.Renaud, M.de los Reyes, R.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Böttcher, M.Rudak, B.Rulten, C. B.Sahakian, V.Salek, D.Sanchez, DanielSantangelo, A.Schlickeiser, R.Schuessler, F.Schulz, A.Schwanke, U.Boisson, C.Schwarzburg, S.Schwemmer, S.Sol, H.Spanier, F.Spengler, G.Spies, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Bolmont, J.Stycz, K.Sushch, I.Tavernet, J.-P.Tavernier, T.Taylor, A. M.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.Aharonian, F.Bordas, P.van Soelen, B.Vasileiadis, G.Veh, J.Venter, C.Viana, A.Vincent, P.Vink, J.Voelk, H. J.Volpe, F.Vorster, M.Bregeon, J.Vuillaume, T.Wagner, S. J.Wagner, P.Wagner, R. M.Ward, M.Weidinger, M.Weitzel, Q.White, R.Wierzcholska, A.Willmann, P.Brun, F.Wörnlein, A.Wouters, D.Yang, R.Zabalza, V.Zaborov, D.Zacharias, M.Zdziarski, A. A.Zech, A.Zechlin, H.-S.Brun, P.Bryan, M.Bulik, T.Carrigan, S.Casanova, S.Chadwick, P. M.Chakraborty, N.Ait Benkhali, F.Chalme-Calvet, R.Chaves, R. C. G.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Davids, I. D.Akhperjanian, A. G.Degrange, B.Deil, C.deWilt, P.Djannati-Ataï, A.Domainko, W.Donath, A.Drury, L. O’C.Dubus, G.Dutson, K.Dyks, J.Angüner, E. O.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Backes, M.Fiasson, A.Fontaine, G.Förster, A.Füßling, M.Gabici, S.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Balenderan, S.Glicenstein, J. F.Gottschall, D.Grondin, M.-H.Grudzińska, M.Hadsch, D.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Balzer, A.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Ivascenko, A.Jacholkowska, A.Barnacka, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, MaxKatarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Long-term monitoring of PKS 2155−304 with ATOM and H.E.S.S.: investigation of optical/$\gamma$-ray correlations in different spectral statesinfo:eu-repo/classification/ddc/520In this paper we report on the analysis of all the available optical and very high-energy $\gamma$-ray ($>$200 GeV) data for the BL Lac object PKS 2155$-$304, collected simultaneously with the ATOM and H.E.S.S. telescopes from 2007 until 2009. This study also includes X-ray (RXTE, Swift) and high-energy $\gamma$-ray (Fermi-LAT) data. During the period analysed, the source was transitioning from its flaring to quiescent optical states,and was characterized by only moderate flux changes at different wavelengths on the timescales of days and months. A flattening of the optical continuum with an increasing optical flux can be noted in the collected dataset, but only occasionally and only at higher flux levels. We did not find any universal relation between the very high-energy $\gamma$-ray and optical flux changes on the timescales from days and weeks up to several years. On the other hand, we noted that at higher flux levels the source can follow two distinct tracks in the optical flux-colour diagrams, which seem to be related to distinct $\gamma$-ray states of the blazar. The obtained results therefore indicate a complex scaling between the optical and $\gamma$-ray emission of PKS 2155$-$304, with different correlation patterns holding at different epochs, and a $\gamma$-ray flux depending on the combination of an optical flux and colour rather than a flux alone.Les Ulis : EDP Sciences (2014).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193009https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04462%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.0253info:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930632025-07-30T12:50:56Zec_fundedresourcesVDBopenaireengCeglia, AndreaNuyts, GertCagno, SimoneMeulebroeck, WendyBaert, KittyCosyns, PeterNys, KarinThienpont, HugoJanssens, KoenTerryn, HermanA XANES study of chromophores: the case of black glassinfo:eu-repo/classification/ddc/540We studied the Fe K-edge X-ray absorption near edge (XANES) spectra of several Roman black glassfragments in order to determine the Fe 3+ /SFe ratio of these materials. The selected archaeological glasssamples cover the period 1 st –5 th century AD in nine different sites of the North Western provinces of theRoman Empire. The fragments belong to two different compositional groups demonstrating a diachronicevolution: early Roman HMG (High Magnesia Glass) and Roman Imperial LMG (Low Magnesia Glass). Thefirst group contains natural Fe levels (below 2 wt% as Fe 2 O 3 ), while the LMG has concentrations above5 wt%. This difference is also reflected by Fe 3+ /SFe values. Low iron glass was produced under strongly reducing conditions in order to obtain the black colour, with average Fe 3+ /SFe values z 0.17. LMG glassis somewhat more oxidised (Fe 3+ /SFe z 0.4–0.5). While HMG glass required active control of the furnace environment, LMG was made under ambient atmosphere and its higher oxidation degree is mainly determined by the chemistry of the raw glass.Analytical methods 6(8), 2662 - 2671 (2014). doi:10.1039/c3ay42029ainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRSC Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/193063https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04494%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1039/c3ay42029ainfo:eu-repo/semantics/altIdentifier/wos/WOS:000333524200032info:eu-repo/semantics/altIdentifier/issn/1759-9660info:eu-repo/semantics/altIdentifier/issn/1759-9679info:eu-repo/grantAgreement/EC//265010
oai:bib-pubdb1.desy.de:1930792021-11-10T11:57:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengH.E.S.S. CollaborationAbramowski, A.Barnacka, A.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krüger, P. P.Laffon, H.Lamanna, G.Lefaucheur, J.Becherini, Y.Lemière, A.Lemoine-Goumard, M.Lenain, J. -P.Lohse, T.Lopatin, A.Lu, C. -C.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Tjus, J. BeckerMaxted, N.Mayer, M.McComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Meyer, ManuelModerski, R.Mohamed, M.Moulin, E.Bernlöhr, K.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Odaka, H.Ohm, S.Wilhelmi, E. de OñaOpitz, B.Birsin, E.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Arribas, M. PazPekeur, N. W.Pelletier, G.Perez, J.Petrucci, P. -O.Peyaud, B.Bissaldi, E.Pita, S.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reichardt, I.Reimer, A.Reimer, O.Biteau, J.Renaud, M.Reyes, R. de losRieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Böttcher, M.Sanchez, D. A.Santangelo, A.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Boisson, C.Spies, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Tavernet, J. -P.Tavernier, T.Taylor, A. M.Bolmont, J.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Aharonian, F.Bordas, P.Völk, H. J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, S. J.Wagner, P.Wagner, R. M.Ward, M.Weidinger, M.Weitzel, Q.Brucker, J.White, R.Wierzcholska, A.Willmann, P.Wörnlein, A.Wouters, D.Yang, R.Zabalza, V.Zacharias, M.Zdziarski, A. A.Zech, A.Brun, F.Zechlin, H. -S.Fermi-LAT CollaborationAcero, F.Casandjian, J. M.Cohen-Tanugi, J.Giordano, F.Guillemot, L.Lande, J.Pletsch, H.Uchiyama, Y.Brun, P.Bulik, T.Carrigan, S.Casanova, S.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Benkhali, F. AitCheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Daniel, MarcusDavids, I. D.Akhperjanian, A. G.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Domainko, W.Drury, L. O'C.Dubus, G.Dutson, K.Dyks, J.Angüner, E.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Anton, G.Fiasson, A.Fontaine, G.Förster, A.Füßling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Glicenstein, J. F.Backes, M.Grondin, M. -H.Grudzińska, M.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Hermann, G.Hervet, O.Hillert, A.Balenderan, S.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Balzer, A.Jung, I.Kastendieck, M. A.Katarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Klepser, S.Klochkov, D.Kluźniak, W.Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observationsPrevious observations with HESS have revealed the existence of an extended very-high-energy (VHE; E>100 GeV) gamma-ray source, HESS J1834-087, coincident with the SNR W41. The origin of the gamma-ray emission has been further investigated with HESS and the Fermi-LAT. The gamma-ray data provided by 61h (HESS) and 4 yrs (Fermi LAT) of observations cover over 5 decades in energy (1.8GeV - 30TeV). The morphology and spectrum of the TeV and GeV sources have been studied and multi-wavelength data have been used to investigate the origin of the observed emission. The TeV source can be modeled with a sum of two components: one point-like and one significantly extended (sig_TeV = 0.17{\deg}), both centered on SNR W41 and exhibiting spectra described by a power law of index 2.6. The GeV source detected with Fermi is extended (sig_GeV =0.15{\deg}) and morphologically matches the VHE emission. Its spectrum can be described by a power-law with index 2.15 and joins smoothly the one of the whole TeV source. A break appears in the spectra around 100 GeV. Two main scenarios are proposed to explain the emission: a pulsar wind nebula (PWN) or the interaction of SNR W41 with a molecular cloud. X-ray observations suggest the presence of a point-like source (pulsar candidate) near the center of the SNR and non-thermal X-ray diffuse emission which could arise from a potential PWN. The PWN scenario is supported by the match of of the TeV and GeV positions with the putative pulsar. However, the overall spectrum is reproduced by a 1-zone leptonic model only if an excess of low-energy electrons is injected by a high spin-down power pulsar. This low-energy component is not needed if the point-like TeV source is unrelated to the extended GeV and TeV sources. The interacting SNR scenario is supported by the spatial coincidence between the gamma-ray sources, the detection of OH maser lines and the hadronic modeling.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193079https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04510%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.0862info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930812025-07-30T09:23:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengH.E.S.S. CollaborationAbramowski, A.Barnacka, A.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krüger, P. P.Laffon, H.Lamanna, G.Lefaucheur, J.Becherini, Y.Lemière, A.Lemoine-Goumard, M.Lenain, J. -P.Lohse, T.Lopatin, A.Lu, C. -C.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Tjus, J. BeckerMaxted, N.Mayer, M.McComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Meyer, ManuelModerski, R.Mohamed, M.Moulin, E.Bernlöhr, K.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Odaka, H.Ohm, S.Wilhelmi, E. de OñaOpitz, B.Birsin, E.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Arribas, M. PazPekeur, N. W.Pelletier, G.Perez, J.Petrucci, P. -O.Peyaud, B.Bissaldi, E.Pita, S.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reichardt, I.Reimer, A.Reimer, O.Biteau, J.Renaud, M.Reyes, R. de losRieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Böttcher, M.Sanchez, D. A.Santangelo, A.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Boisson, C.Spies, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Tavernet, J. -P.Tavernier, T.Taylor, A. M.Bolmont, J.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Aharonian, F.Bordas, P.Völk, H. J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, S. J.Wagner, P.Wagner, R. M.Ward, M.Weidinger, M.Weitzel, Q.Brucker, J.White, R.Wierzcholska, A.Willmann, P.Wörnlein, A.Wouters, D.Yang, R.Zabalza, V.Zacharias, M.Zdziarski, A. A.Zech, A.Brun, F.Zechlin, H. -S.Fermi-LAT CollaborationAcero, F.Casandjian, J. M.Cohen-Tanugi, J.Giordano, F.Guillemot, L.Lande, J.Pletsch, H.Uchiyama, Y.Brun, P.Bulik, T.Carrigan, S.Casanova, S.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Benkhali, F. AitCheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Daniel, MarcusDavids, I. D.Akhperjanian, A. G.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Domainko, W.Drury, L. O'C.Dubus, G.Dutson, K.Dyks, J.Angüner, E.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Anton, G.Fiasson, A.Fontaine, G.Förster, A.Füßling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Glicenstein, J. F.Backes, M.Grondin, M. -H.Grudzińska, M.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Hermann, G.Hervet, O.Hillert, A.Balenderan, S.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Balzer, A.Jung, I.Kastendieck, M. A.Katarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Klepser, S.Klochkov, D.Kluźniak, W.Probing the Gamma-Ray Emission from HESS J1834-087 using H.E.S.S. and Fermi LAT Observationsinfo:eu-repo/classification/ddc/520Previous observations with HESS have revealed the existence of an extended very-high-energy (VHE; E>100 GeV) gamma-ray source, HESS J1834-087, coincident with the SNR W41. The origin of the gamma-ray emission has been further investigated with HESS and the Fermi-LAT. The gamma-ray data provided by 61h (HESS) and 4 yrs (Fermi LAT) of observations cover over 5 decades in energy (1.8GeV - 30TeV). The morphology and spectrum of the TeV and GeV sources have been studied and multi-wavelength data have been used to investigate the origin of the observed emission. The TeV source can be modeled with a sum of two components: one point-like and one significantly extended (sig_TeV = 0.17{\deg}), both centered on SNR W41 and exhibiting spectra described by a power law of index 2.6. The GeV source detected with Fermi is extended (sig_GeV =0.15{\deg}) and morphologically matches the VHE emission. Its spectrum can be described by a power-law with index 2.15 and joins smoothly the one of the whole TeV source. A break appears in the spectra around 100 GeV. Two main scenarios are proposed to explain the emission: a pulsar wind nebula (PWN) or the interaction of SNR W41 with a molecular cloud. X-ray observations suggest the presence of a point-like source (pulsar candidate) near the center of the SNR and non-thermal X-ray diffuse emission which could arise from a potential PWN. The PWN scenario is supported by the match of of the TeV and GeV positions with the putative pulsar. However, the overall spectrum is reproduced by a 1-zone leptonic model only if an excess of low-energy electrons is injected by a high spin-down power pulsar. This low-energy component is not needed if the point-like TeV source is unrelated to the extended GeV and TeV sources. The interacting SNR scenario is supported by the spatial coincidence between the gamma-ray sources, the detection of OH maser lines and the hadronic modeling.Astronomy and astrophysics 574(10), A27 (2015). doi:10.1051/0004-6361/201322694info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193081https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04512%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.0862info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201322694info:eu-repo/semantics/altIdentifier/wos/WOS:000349467000027info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930822021-11-10T11:57:46Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBroy, BenedictPedro, FranciscoWestphal, AlexanderDisentangling the f$(R)$ - Dualityinflation: modelhigher-order: 0dualitystring modelsupergravitysuppressionJordanultravioletMotivated by UV realisations of Starobinsky-like inflation models, we study generic exponential plateau-like potentials to understand whether an exact $f(R)$-formulation may still be obtained when the asymptotic shift-symmetry of the potential is broken for larger field values. Potentials which break the shift symmetry with rising exponentials at large field values only allow for corresponding $f(R)$-descriptions with a leading order term $R^{n}$ with $1<n<2$, regardless of whether the duality is exact or approximate. The $R^2$-term survives as part of a series expansion of the function $f(R)$ and thus cannot maintain a plateau for all field values. We further find a lean and instructive way to obtain a function $f(R)$ describing $m^2\phi^2$-inflation which breaks the shift symmetry with a monomial, and corresponds to effectively logarithmic corrections to an $R+R^2$ model. These examples emphasise that higher order terms in $f(R)$-theory may not be neglected if they are present at all. Additionally, we relate the function $f(R)$ corresponding to chaotic inflation to a more general Jordan frame set-up. In addition, we consider $f(R)$-duals of two given UV examples, both from supergravity and string theory. Finally, we outline the CMB phenomenology of these models which show effects of power suppression at low-$\ell$.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193082https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04513%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.6010info:eu-repo/grantAgreement/EC//320421
oai:bib-pubdb1.desy.de:1930842025-07-30T12:50:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAbramowski, A.Aharonian, F.Becker Tjus, J.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lennarz, D.Lohse, T.Lopatin, A.Lu, C.-C.Marandon, V.Marcowith, A.Marx, R.Bernlöhr, K.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Méhault, J.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Moulin, E.Birsin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.O’Brien, P. T.de Oña Wilhelmi, E.Opitz, B.Ostrowski, M.Bissaldi, E.Oya, I.Panter, M.Parsons, R. D.Paz Arribas, M.Pekeur, N. W.Pelletier, G.Perez, J.Petrucci, P.-O.Peyaud, B.Pita, S.Biteau, J.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Reimer, O.Renaud, M.de los Reyes, R.Bordas, P.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Sanchez, D. A.Santangelo, A.Brucker, J.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Spies, F.Stawarz, Ł.Brun, F.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Szostek, A.Tam, P. H. T.Tavernet, J.-P.Tavernier, T.Taylor, A. M.Brun, P.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Völk, H. J.Bulik, T.Volpe, F.Vorster, M.Wagner, P.Ward, M.Weidinger, M.Weitzel, Q.White, R.Wierzcholska, A.Willmann, P.Wörnlein, A.Ait Benkhali, F.Carrigan, S.Wouters, D.Zacharias, M.Zajczyk, A.Zdziarski, A. A.Zech, A.Zechlin, H.-S.H.E.S.S. CollaborationBöttcher, M.Boisson, C.Bolmont, J.Casanova, S.Conrad, J.Edwards, T.Förster, A.Hahn, J.Lennarz, D.Ohm, S.Wagner, S. J.Cerruti, M.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Cheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Akhperjanian, A. G.Couturier, C.Dalton, M.Daniel, M. K.Davids, I. D.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Domainko, W.Angüner, E.Drury, L. O’C.Dubus, G.Dutson, K.Dyks, J.Dyrda, M.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Anton, G.Feinstein, F.Fernandes, M. V.Fernandez, D.Fiasson, A.Fontaine, G.Füßling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giebels, B.Balenderan, S.Glicenstein, J. F.Grondin, M.-H.Grudzińska, M.Häffner, S.Harris, J.Heinzelmann, G.Henri, G.Hermann, G.Hervet, O.Hillert, A.Balzer, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Barnacka, A.Jung, I.Kastendieck, M. A.Katarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Klepser, S.Klochkov, D.Kluźniak, W.Becherini, Y.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krüger, P. P.Laffon, H.Lamanna, G.Lefaucheur, J.Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S.info:eu-repo/classification/ddc/520Astronomy and astrophysics 565, A16 (2014). doi:10.1051/0004-6361/201322984info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193084https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04515%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.0488info:eu-repo/semantics/altIdentifier/wos/WOS:000336730900016info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201322984info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930862025-07-30T12:51:00Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAbramowski, A.Aharonian, F.Biteau, J.Lopatin, A.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Mehault, J.Meintjes, P. J.Boisson, C.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Moulin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Bordas, P.Oakes, L.Ohm, S.Opitz, B.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Pekeur, N. W.Pelletier, G.Perez, J.Brucker, J.Peyaud, B.Pita, S.Poon, H.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Reimer, O.Renaud, M.Brun, F.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Sanchez, D. A.Santangelo, A.Brun, P.Schlickeiser, R.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Spies, F.Steenkamp, R.Stegmann, C.Bulik, T.Stinzing, F.Stycz, K.Sushch, I.Szostek, A.Tavernier, T.Taylor, A. M.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.Carrigan, S.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Volpe, F.Vorster, M.Vuillaume, T.Wagner, P.Casanova, S.Ward, M.Weidinger, M.Weitzel, Q.White, R.Wierzcholska, A.Willmann, P.Wornlein, A.Wouters, D.Zabalza, V.Zacharias, M.Cerruti, M.Zajczyk, A.Zdziarski, A. A.Zech, A.Zechlin, Hannes-SebastianH.E.S.S. CollaborationAit Benkhali, F.Anguener, Ekrem OguzhanBecker Tjus, J.Bernlöhr, K.Böttcher, M.Akhperjanian, A. G.Chadwick, P. M.Bolmont, J.Edwards, T.Förster, A.Fuessling, MatthiasGrondin, M.-H.Grudzinska, M.Hahn, J.Katarzynski, K.Kluzniak, W.Lu, C.-C.Chalme-Calvet, R.de Ona Wilhelmi, E.Paz Arribas, ManuelPetrucci, P.-O.Pühlhofer, G.de los Reyes, R.Schüssler, F.Stawarz, L.Tavernet, J.-P.Völk, H. J.Wagner, S. J.Chaves, R. C. G.Cheesebrough, A.Chretien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Anton, G.Dalton, M.Daniel, M. K.Davids, I. D.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Atai, A.Domainko, W.Drury, L. O.Balenderan, S.Dubus, G.Dutson, K.Dyks, J.Dyrda, M.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Balzer, A.Fernandes, M. V.Fernandez, D.Fiasson, A.Fontaine, G.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Glicenstein, J. F.Barnacka, A.Haffner, S.Harris, J.Heinzelmann, G.Henri, G.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Becherini, Y.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, M. A.Katz, U.Birsin, E.Kaufmann, S.Khelifi, B.Kieffer, M.Klepser, S.Klochkov, D.Kneiske, T.Kolitzus, D.Komin, N.Kosack, K.Krakau, S.Bissaldi, E.Krayzel, F.Kruger, P. P.Laffon, H.Lamanna, G.Lefaucheur, J.Lemiere, A.Lemoine-Goumard, M.Lenain, J.- P.Lennarz, D.Lohse, T.TeV ${\gamma}$-ray observations of the young synchrotron-dominated SNRs G1.9+0.3 and G330.2+1.0 with H.E.S.S.info:eu-repo/classification/ddc/520Monthly notices of the Royal Astronomical Society 441(1), 790 - 799 (2014). doi:10.1093/mnras/stu459info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionOxford Univ. Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193086https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04517%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1404.1613info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu459info:eu-repo/semantics/altIdentifier/wos/WOS:000336249300061info:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04517info:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930882025-07-30T12:50:39Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengH.E.S.S. CollaborationAbramowski, A.Becherini, Y.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krüger, P. P.Laffon, H.Lamanna, G.Lefaucheur, J.Becker Tjus, J.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lennarz, D.Lohse, T.Lopatin, A.Lu, C.-C.Marandon, V.Marcowith, A.Marx, R.Bernlöhr, K.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Birsin, E.Moulin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Ohm, S.de Oña Wilhelmi, E.Opitz, B.Bissaldi, E.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Paz Arribas, M.Pekeur, N. W.Pelletier, G.Perez, J.Petrucci, P.-O.Peyaud, B.Biteau, J.Pita, S.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Reimer, O.Renaud, M.Böttcher, M.de los Reyes, R.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Sanchez, D. A.Boisson, C.Santangelo, A.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Spies, F.Bolmont, J.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Szostek, A.Tavernet, J.-P.Tavernier, T.Taylor, A. M.Bordas, P.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Aharonian, F.Brucker, J.Völk, H. J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, S. J.Wagner, P.Ward, M.Weidinger, M.Weitzel, Q.White, R.Brun, F.Wierzcholska, A.Willmann, P.Wörnlein, A.Wouters, D.Zabalza, V.Zacharias, M.Zajczyk, A.Zdziarski, A. A.Zech, A.Zechlin, H.-S.Brun, P.Bulik, T.Carrigan, S.Casanova, S.Cerruti, M.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Ait Benkhali, F.Cheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Daniel, M. K.Davids, I. D.Akhperjanian, A. G.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Domainko, W.Drury, L. O’C.Dubus, G.Dutson, K.Dyks, J.Angüner, E.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Anton, G.Fiasson, A.Fontaine, G.Förster, A.Füßling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Glicenstein, J. F.Balenderan, S.Grondin, M.-H.Grudzińska, M.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Hermann, G.Hervet, O.Hillert, A.Balzer, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Barnacka, A.Jung, I.Kastendieck, M. A.Katarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Klepser, S.Klochkov, D.Kluźniak, W.Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011info:eu-repo/classification/ddc/520Astronomy and astrophysics 564, A9 (2014). doi:10.1051/0004-6361/201322897info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193088https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04519%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201322897info:eu-repo/semantics/altIdentifier/wos/WOS:000334671000009info:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1402.2332info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930912025-07-30T12:50:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAbramowski, A.Aharonian, F.Bissaldi, E.Lemiere, A.Lemoine-Goumard, M.Lenain, J.- P.Lohse, T.Lopatin, A.Lu, C.- C.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Biteau, J.Maxted, N.Mayer, MichaelMcComb, T. J. L.Mehault, J.Meintjes, P. J.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Moulin, E.Boisson, C.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Ohm, S.Opitz, B.Ostrowski, M.Oya, I.Bolmont, J.Panter, M.Parsons, R. D.Pekeur, N. W.Pelletier, G.Perez, J.Petrucci, P.- O.Peyaud, B.Pita, S.Poon, H.Punch, M.Bordas, P.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Reimer, O.Renaud, M.Reyes, R. d. l.Rieger, F.Rob, L.Romoli, C.Brucker, J.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Sanchez, D. A.Santangelo, A.Schlickeiser, R.Schulz, A.Schwanke, U.Brun, F.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Spies, F.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Brun, P.Szostek, A.Tavernet, J.- P.Tavernier, T.Taylor, A. M.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Bulik, T.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Vink, J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, P.Ward, M.Carrigan, S.Weidinger, M.Weitzel, Q.White, R.Wierzcholska, A.Willmann, P.Wornlein, A.Wouters, D.Zabalza, V.Zacharias, M.Zajczyk, A.Akhperjanian, A. G.Casanova, S.Zdziarski, A. A.Zech, A.Zechlin, H.- S.H.E.S.S. CollaborationAit Benkhali, F.Becker Tjus, J.Bernlöhr, K.Böttcher, M.Daniel, M. K.Edwards, T.Cerruti, M.Grudzinska, M.Katarzynski, K.Kluzniak, W.Krüger, P. P.Lennarz, D.de Ona Wilhelmi, E.Paz Arribas, ManuelPühlhofer, G.de los Reyes, R.Schüssler, F.Chadwick, P. M.Stawarz, L.Völk, H. J.Wagner, S. J.Chalme-Calvet, R.Chaves, R. C. G.Cheesebrough, A.Chretien, M.Colafrancesco, S.Cologna, G.Conrad, J.Anguner, E.Couturier, C.Cui, Y.Dalton, M.Davids, I. D.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Atai, A.Domainko, W.Anton, G.Drury, L. O.Dubus, G.Dutson, K.Dyks, J.Dyrda, M.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Balenderan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Fiasson, A.Fontaine, G.Forster, A.Fussling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Balzer, A.Giavitto, G.Giebels, B.Glicenstein, J. F.Grondin, M.- H.Grudzi ska, M.Haffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Barnacka, A.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Becherini, Y.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, M. A.Katz, U.Kaufmann, S.Khelifi, B.Kieffer, M.Klepser, S.Birsin, E.Klochkov, D.Kneiske, T.Kolitzus, D.Komin, N.Kosack, K.Krakau, S.Krayzel, F.Laffon, H.Lamanna, G.Lefaucheur, J.HESS J1640-465 - an exceptionally luminous TeV ${\gamma}$-ray supernova remnantinfo:eu-repo/classification/ddc/520Monthly notices of the Royal Astronomical Society 439(3), 2828 - 2836 (2014). doi:10.1093/mnras/stu139info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionOxford Univ. Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193091https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04522%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000334114900046info:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2014-04522info:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.4388info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu139info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930932025-07-30T12:50:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAbramowski, A.Aharonian, F.Becker Tjus, J.Lamanna, G.Lefaucheur, J.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lopatin, A.Lu, C.-C.Marandon, V.Marcowith, A.Marx, R.Bernlöhr, K.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Birsin, E.Moulin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Odaka, H.Ohm, S.de Oña Wilhelmi, E.Bissaldi, E.Opitz, B.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Paz Arribas, M.Pekeur, N. W.Pelletier, G.Perez, J.Petrucci, P.-O.Biteau, J.Peyaud, B.Pita, S.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reichardt, I.Reimer, A.Bordas, P.Reimer, O.Renaud, M.de los Reyes, R.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Brucker, J.Sahakian, V.Sanchez, D. A.Santangelo, A.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Brun, F.Spengler, G.Spies, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Tavernet, J.-P.Tavernier, T.Brun, P.Taylor, A. M.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Bulik, T.Vincent, P.Völk, H. J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, S. J.Wagner, P.Wagner, R. M.Ward, M.Weidinger, M.Akhperjanian, A. G.Carrigan, S.Weitzel, Q.White, R.Wierzcholska, A.Willmann, P.Wörnlein, A.Wouters, D.Yang, R.Zabalza, V.Zacharias, M.Zdziarski, A. A.Casanova, S.Zech, A.Zechlin, H.-S.Malyshev, D.H.E.S.S. CollaborationAit Benkhali, F.Böttcher, M.Boisson, M.Bolmont, J.Edwards, T.Förster, A.Chadwick, P. M.Krüger, P. P.Lohse, T.Chalme-Calvet, R.Chaves, R. C. G.Cheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Angüner, E.Couturier, C.Cui, Y.Dalton, M.Daniel, M. K.Davids, I. D.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Anton, G.Domainko, W.Drury, L. O’C.Dubus, G.Dutson, K.Dyks, J.Dyrda, M.Egberts, K.Eger, P.Espigat, P.Farnier, C.Backes, M.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Fiasson, A.Fontaine, G.Füßling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Balenderan, S.Giavitto, G.Giebels, B.Glicenstein, J. F.Grondin, M.-H.Grudzińska, M.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Balzer, A.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Barnacka, A.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, MaxKatarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Becherini, Y.Klepser, S.Klochkov, D.Kluźniak, W.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Laffon, H.Search for extended ${\gamma}$-ray emission around AGN with H.E.S.S. and Fermi -LATinfo:eu-repo/classification/ddc/520Astronomy and astrophysics 562, A145 (2014). doi:10.1051/0004-6361/201322510info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193093https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04524%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000332161800080info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.2915info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201322510info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:1930942025-07-30T12:50:54Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAbramowski, A.Aharonian, F.Becker Tjus, J.Lamanna, G.Lefaucheur, J.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lennarz, D.Lopatin, A.Lu, C.-C.Marandon, V.Marcowith, A.Bernlöhr, K.Marx, R.Maurin, G.Maxted, N.McComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Birsin, E.Moulin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Ohm, S.de Oña Wilhelmi, E.Opitz, B.Bissaldi, E.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Paz Arribas, M.Pekeur, N. W.Pelletier, G.Perez, J.Petrucci, P.-O.Peyaud, B.Biteau, J.Pita, S.Poon, H.Pühlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Reimer, O.Renaud, M.Bordas, P.de los Reyes, R.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Sanchez, DanielBrucker, J.Santangelo, A.Schlickeiser, R.Schüssler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Spies, F.Brun, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Szostek, A.Tavernet, J.-P.Tavernier, T.Taylor, A. M.Brun, P.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Bulik, T.Völk, H. J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, S. J.Wagner, P.Ward, M.Weidinger, M.Weitzel, Q.White, R.Ait Benkhali, F.Carrigan, S.Wierzcholska, A.Willmann, P.Wörnlein, A.Wouters, D.Zabalza, V.Zacharias, M.Zajczyk, A.Zdziarski, A. A.Zech, A.Zechlin, H.-S.Casanova, S.H.E.S.S. CollaborationBöttcher, M.Boisson, C.Bolmont, J.Daniel, M. K.Edwards, T.Förster, A.Krüger, P. P.Lohse, T.Mayer, M.Cerruti, M.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Cheesebrough, A.Chrétien, M.Colafrancesco, S.Cologna, G.Akhperjanian, A. G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Davids, I. D.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Ataï, A.Angüner, E.Domainko, W.Drury, L. O’C.Dubus, G.Dutson, K.Dyks, J.Dyrda, M.Egberts, K.Eger, P.Espigat, P.Farnier, C.Anton, G.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Fiasson, A.Fontaine, G.Füßling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Balenderan, S.Giavitto, G.Giebels, B.Glicenstein, J. F.Grondin, M.-H.Grudzińska, M.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Balzer, A.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Barnacka, A.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, M. A.Katarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Kieffer, M.Becherini, Y.Klepser, S.Klochkov, D.Kluźniak, W.Kneiske, T.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Laffon, H.H.E.S.S. observations of the Crab during its March 2013 GeV ${\gamma}$-ray flareinfo:eu-repo/classification/ddc/520Context. On March 4, 2013, the Fermi-LAT and AGILE reported a flare from the direction of the Crab Nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its quiescent level. Simultaneous observations in other energy bands give us hints about the emission processes during the flare episode and the physics of pulsar wind nebulae in general. Aims. We search for variability of the emission of the Crab Nebula at very-high energies (VHE; E > 100 GeV), using contemporaneous data taken with the H.E.S.S. array of Cherenkov telescopes. Methods. Observational data taken with the H.E.S.S. instrument on five consecutive days during the flare were analysed concerning the flux and spectral shape of the emission from the Crab Nebula. Night-wise light curves are presented with energy thresholds of 1 TeV and 5 TeV. Results. The observations conducted with H.E.S.S. on 2013 March 6 to March 10 show no significant changes in the flux. They limit the variation on the integral flux above 1 TeV to less than 63% and the integral flux above 5 TeV to less than 78% at a 95% confidence level.Astronomy and astrophysics 562, 1-5 (2014). doi:10.1051/0004-6361/201323013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/193094https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04525%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1311.3187info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201323013info:eu-repo/semantics/altIdentifier/wos/WOS:000332161800140info:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:2051632025-07-30T12:50:34Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAssmann, R.Bingham, R.Fonseca, R. A.Goddard, B.Gross, M.Grulke, O.Gschwendtner, E.Holloway, J.Huang, C.Jaroszynski, D.Jolly, S.Kempkes, P.Bohl, T.Lopes, N.Lotov, K.Machacek, J.Mandry, S. R.McKenzie, J. W.Meddahi, M.Militsyn, B. L.Moschuering, N.Muggli, P.Najmudin, Z.Bracco, C.Noakes, T. C. Q.Norreys, P. A.Öz, E.Pardons, A.Petrenko, A.Pukhov, A.Rieger, K.Reimann, O.Ruhl, H.Shaposhnikova, E.Buttenschön, B.Silva, L. O.Sosedkin, A.Tarkeshian, R.Trines, R. M. G. N.Tückmantel, T.Vieira, J.Vincke, H.Wing, M.Xia, G.Butterworth, A.Caldwell, A.Chattopadhyay, S.Cipiccia, S.Feldbaumer, E.Proton-driven plasma wakefield acceleration: a path to the future of high-energy particle physicsinfo:eu-repo/classification/ddc/530New acceleration technology is mandatory for the future elucidation of fundamental particles and theirinteractions. A promising approach is to exploit the properties of plasmas. Past research has focused oncreating large-amplitude plasma waves by injecting an intense laser pulse or an electron bunch into theplasma. However, the maximum energy gain of electrons accelerated in a single plasma stage is limitedby the energy of the driver. Proton bunches are the most promising drivers of wakefields to accelerateelectrons to the TeV energy scale in a single stage. An experimental program at CERN—the AWAKEexperiment—has been launched to study in detail the important physical processes and to demonstrate the power of proton-driven plasma wakefield acceleration. Here we review the physical principles andsome experimental considerations for a future proton-driven plasma wakefield accelerator.Plasma physics and controlled fusion 56(8), 084013 (2014). doi:10.1088/0741-3335/56/8/084013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205163https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04590%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.4823info:eu-repo/semantics/altIdentifier/wos/WOS:000340055300014info:eu-repo/semantics/altIdentifier/issn/0368-3281info:eu-repo/semantics/altIdentifier/issn/0032-1028info:eu-repo/semantics/altIdentifier/doi/10.1088/0741-3335/56/8/084013info:eu-repo/semantics/altIdentifier/issn/1879-2979info:eu-repo/semantics/altIdentifier/issn/1361-6587info:eu-repo/semantics/altIdentifier/issn/0741-3335info:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2051672025-07-17T09:26:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDuesterer, StefanRehders, MarieFruehling, UlrikeGerasimova, NataliaGerken, NilsGerth, ChristopherGolz, TorstenGrebentsov, AlexanderHass, EugenHonkavaara, KatjaKocharian, V.Kurka, MoritzAl-Shemmary, AlaaLimberg, Th.Mitzner, RolfMoshammer, RobertPlönjes, ElkeRichter, M.Roensch-Schulenburg, JulianeRudenko, ArtemSchlarb, HolgerSchmidt, B.Senftleben, ArneBehrens, ChristopherSchneidmiller, E. A.Siemer, BjoernSorgenfrei, FlorianSorokin, A. A.Stojanovic, NikolaTiedtke, KaiTreusch, RolfVogt, MarcoWieland, M.Wurth, WilfriedBrenner, GuenterWesch, StephanYan, MinjieYurkov, M. V.Zacharias, HelmutSchreiber, SiegfriedBrovko, OlegDellAngela, M.Drescher, MarkusFaatz, BartFeldhaus, JosefDevelopment of experimental techniques for the characterization of ultrashort photon pulses of extreme ultraviolet free-electron lasersinfo:eu-repo/classification/ddc/530One of the most challenging tasks for extreme ultraviolet, soft and hard x-ray free-electron laser photon diagnostics is the precise determination of the photon pulse duration, which is typically in the sub 100 fs range. Nine different methods, able to determine such ultrashort photon pulse durations, were compared experimentally at FLASH, the self-amplified spontaneous emission free-electron laser at DESY in Hamburg, in order to identify advantages and disadvantages of different methods. Radiation pulses at a wavelength of 13.5 and 24.0 nm together with the corresponding electron bunch duration were measured by indirect methods like analyzing spectral correlations, statistical fluctuations, and energy modulations of the electron bunch and also by direct methods like autocorrelation techniques, terahertz streaking, or reflectivity changes of solid state samples. In this paper, we present a comprehensive overview of the various techniques and a comparison of the individual experimental results. The information gained is of utmost importance for the future development of reliable pulse duration monitors indispensable for successful experiments with ultrashort extreme ultraviolet pulses.Physical review accelerators and beams 17(12), 120702 (2014). doi:10.1103/PhysRevSTAB.17.120702info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Physical Society2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205167https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04594%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevSTAB.17.120702info:eu-repo/semantics/altIdentifier/wos/WOS:000346437200001info:eu-repo/semantics/altIdentifier/issn/1098-4402info:eu-repo/grantAgreement/EC//283745
oai:bib-pubdb1.desy.de:2052012021-11-10T11:58:28Zec_fundedresourcesdriverVDBopen_accessopenaireengDiener, RalfGregor, Ingrid-MariaPotylitsina-Kube, NataliaWP5: Access to DESY Test Beamsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA FINAL MEETING, Geneva, DESY, Switzerland, 2014-12-09 - 2014-12-112014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205201https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04614%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2052862021-11-10T11:58:35Zec_fundedresourcesdriverVDBopen_accessopenaireengEbrahimi, AliakbarTask 9.5: Granular Calorimeter Studies InfrastructureReport on AHCAL development in AIDA 3rd Annual Meeting in Viennainfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionAIDA annual meeting, University of Vienna, 2014-03-192014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205286https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04688%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2052882021-11-10T11:58:35Zec_fundedresourcesdriverVDBopen_accessopenaireengEbrahimi, AliakbarCommon DAQ issues for CALICE AHCALinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionAIDA annual meeting, University of Vienna, 2014-03-192014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205288https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04690%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2052902017-02-10T22:44:46Zec_fundedresourcesVDBopenaireengEbrahimi, AliakbarCALICE Scintillator Data Acquisition System, Integration into a Common DAQinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionAHCAL Main meeting, DESY-Hamburg, DESY, 2014-12-162014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205290https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04692%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2052912021-11-10T11:58:36Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKrueger, KatjaPrototype tests for a highly granular scintillator-based hadron calorimeterWithin the CALICE collaboration, several concepts for the hadronic calorimeter of a future linear collider detector are studied. After having demonstrated the capabilities of the measurement methods in "physics prototypes", the focus now lies on improving their implementation in "engineering prototypes", that are scalable to the full linear collider detector. The Analog Hadron Calorimeter (AHCAL) concept is a sampling calorimeter of tungsten or steel absorber plates and plastic scintillator tiles read out by silicon photomultipliers (SiPMs) as active material. The front-end chips are integrated into the active layers of the calorimeter and are designed for minimal power consumption (power pulsing). The versatile electronics allows the prototype to be equipped with different types of scintillator tiles and SiPMs. The current version of the AHCAL engineering prototype has ~1200 channels in eight active layers, with several types of scintillator tiles and SiPMs. Results from recent beam test measurements of minimal ionizing particles and electromagnetic showers will be presented, and plans for future hadron beam tests with a larger prototype will be discussed.5 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion16th International Conference on Calorimetry in High Energy Physics, CALOR2014, Giessen, Germany, 2014-04-06 - 2014-04-112014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205291https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04693%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2052932017-02-10T22:44:47Zec_fundedresourcesVDBopenaireengEbrahimi, AliakbarCommissioning of the New Multilayer Integration Prototype with SiPM Readout of the CALICE Tile Hadron CalorimeterThe basic prototype of a tile hadron calorimeter (HCAL) for the International Linear Collider (ILC) detector has been realized and extensively tested. A major aspect of the proposed concept is the improvement of the jet energy resolution by measuring details of the shower development and combining them with the data of the tracking system (particle flow). The prototype utilizes scintillating tiles that are read out by novel Silicon Photomultipliers (SiPMs) and takes into account all design aspects that are demanded by the intended operation at the ILC. Currently, a new 12 layer prototype with about 2500 detector channels is under development. The new prototype will be used for the first time in the proposed configuration for the measurement of shower profiles and shower development in time using the hadronic beam at the CERN PS test facility in fall 2014. Alternative architectures for the scintillating tiles with and without wavelength-shifting fibres and tiles with individual wrapping with reflector foil will be tested as well as different types of SiPMs. Additionally, detector modules for the CALICE scintillator-based electromagnetic calorimeter, that follow the proposed HCAL electronics architecture, will be part of this new prototype. A new data acquisition (DAQ) is currently under development for the detector configuration and operation. Despite the on-detector zero-suppression, the remaining huge amount of data demands a high efficiency for the new DAQ’s processing and online-monitoring capabilities. Results for the commissioning of the new prototype will be shown including results from a first test of a steel stack with 8 detector layers in the DESY electron test beam facility.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionIEEE Nuclear Science Symposium and Medical Imaging Conference 2014, NSSMIC2014, Seattle, Unites States of America, 2014-11-08 - 2014-11-152014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205293https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04695%22Researchersinfo:eu-repo/grantAgreement/EC//289355
oai:bib-pubdb1.desy.de:2052942017-02-10T22:44:47Zec_fundedresourcesVDBopenaireengEbrahimi, AliakbarCommissioning of the New Multilayer Integration Prototype with SiPM Readout of the CALICE Tile Hadron Calorimeterinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionIEEE Nuclear Science Symposium and Medical Imaging Conference 2014, NSSMIC2014, Seattle, United States of America, 2014-11-08 - 2014-11-152015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205294https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04696%22Researchersinfo:eu-repo/grantAgreement/EC//289355
oai:bib-pubdb1.desy.de:2053282021-11-10T11:58:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNavitski, A.Prudnikava, A.Tamashevich, Y.Progress of R&D on SRF cavities at DESY towards ILC performance goalAn extensive R&D programme on cavity investigationsand treatments towards ILC performance goal has beenestablished at DESY. Aims and details of the program aswell as the detailed results of the optical inspections andreplica investigations of the inner cavities surface will bereported.Geneve : JACoW 2499 - 2501 (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion5th International Particle Accelerator Conference, IPAC’14, Dresden, Germany, 2014-06-15 - 2014-06-20JACoW2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205328https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04729%22Researchersinfo:eu-repo/grantAgreement/EC//283745info:eu-repo/grantAgreement/EC//206711
oai:bib-pubdb1.desy.de:2053632021-11-10T11:58:46Zec_fundedresourcesdriverVDBopen_accessopenaireengWeise, HansThe European XFEL - Challenges and Statusinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion1st Enhanced European Coordination for Accelerator R&D Annual Meeting, EuCARD2, Hamburg, Germany, 2014-05-19 - 2014-05-232014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205363https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04762%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2053752026-03-10T09:26:11Zec_fundedresourcesdriverVDBopen_accessopenaireengSchaffran, J.Petersen, BerndReschke, D.Swierblewski, J.Test sequence for superconducting XFEL Cavities in the Accelerator Module Test Facility (AMTF) at DESYThe European XFEL is a new research facility currently under construction at DESY in the Hamburg area in Germany. From 2016 on, it will generate extremely intense X-ray flashes that will be used by researchers from all over the world. The main part of the superconducting European XFEL linear accelerator consists of 100 accelerator modules with 800 RF-cavities inside. The accelerator modules, superconducting magnets and cavities will be tested in the accelerator module test facility (AMTF) at DESY. This paper gives an overview of the test sequences for the superconducting cavities, applied in the preparation area and at the two cryostats (XATC) of the AMTF-hall, and describes the complete area. In addition it summarizes the tests and lessons learnt until the middle of 2014.© 2014 The Authors. Published by Elsevier B.V.Peer-review under responsibility of the organizing committee of ICEC 25-ICMC 2014.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion25th International Cryogenic Engineering Conference & International Cryogenic Materials Conference, ICEC2014, Enschede, The Netherlands, 2014-07-07 - 2014-07-112014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205375https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04774%22Researchersinfo:eu-repo/grantAgreement/EC//283745
oai:bib-pubdb1.desy.de:2053762021-11-10T11:58:47Zec_fundedresourcesdriverVDBopen_accessopenaireengVoutsinas, Georgios GerasimosGaede, FrankProgress in Track Reconstructioninfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionILD Meeting 2014, Oshu, Japan, 2014-09-05 - 2014-09-092014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205376https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04775%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2053842017-02-10T22:44:56Zec_fundedresourcesVDBopenaireengSefkow, FelixInfrastructure Upgrades for Calorimetryinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA H2020 Open Meeting, Geneva, Switzerland, 2014-02-17 - 2014-02-182014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205384https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04783%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2053872017-02-10T22:44:56Zec_fundedresourcesVDBopenaireengSefkow, FelixInfrastructure for Detector Development in Horizon 2020info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion3rd AIDA Annual Meeting, Vienna, Austria, 2014-03-25 - 2014-03-282014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205387https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04786%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2053902017-02-10T22:44:56Zec_fundedresourcesVDBopenaireengSefkow, FelixUpgrades of the DESY Test Beam Facilities in H2020info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAIDA-2020 proposal preparation meeting, Geneva, Switzerland, 2014-04-28 - 2014-04-292014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205390https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04789%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2053942017-02-10T22:44:56Zec_fundedresourcesVDBopenaireengSefkow, FelixCalorimetry in AIDA: Adequateness of Geant4 shower simulation modelsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion4th AIDA annual meeting, Geneva, Switzerland, 2014-12-02 - 2014-12-042014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205394https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04793%22Researchersinfo:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2053972025-07-30T12:51:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAdloff, C.Blaising, J -JRepond, J.Miyazaki, Y.Sudo, Y.Ueno, H.Yoshioka, T.Dauncey, P. D.Gil, E CortinaMannai, S.Baulieu, G.Calabria, P.Caponetto, L.Schlereth, J.Combaret, C.Negra, R DellaEté, R.Grenier, G.Han, R.Ianigro, J-CKieffer, R.Laktineh, I.Lumb, N.Mathez, H.Xia, L.Mirabito, L.Petrukhin, A.Steen, A.Tromeur, W.Donckt, M VanderZoccarato, Y.Antequera, J BerenguerAlamillo, E CalvoFouz, M -CPuerta-Pelayo, J.Baldolemar, E.Corriveau, F.Bobchenko, B.Chadeeva, M.Danilov, M.Epifantsev, A.Markin, O.Mizuk, R.Novikov, E.Rusinov, V.Tarkovsky, E.Li, J.Kozlov, V.Soloviev, Y.Besson, D.Buzhan, P.Ilyin, A.Kantserov, V.Kaplin, V.Popova, E.Tikhomirov, V.Gabriel, M.Park, S. T.Kiesling, C.Seidel, K.Soldner, C.Szalay, M.Tesar, M.Weuste, L.Amjad, M. S.Bonis, J.di Lorenzo, S ConfortiCornebise, P.Sosebee, M.Fleury, J.Frisson, T.Kolk, N van derRichard, F.Pöschl, R.Rouëné, J.Anduze, M.Balagura, V.Becheva, E.Boudry, V.White, A. P.Brient, J-CCornat, R.Frotin, M.Gastaldi, F.Guliyev, E.Haddad, Y.Magniette, F.Ruan, M.Tran, T. H.Videau, H.Yu, J.Callier, S.Dulucq, F.Martin-Chassard, G.Taille, Ch de laRaux, L.Seguin-Moreau, N.Zacek, J.Cvach, J.Gallus, P.Havranek, M.Eigen, G.Janata, M.Kvasnicka, J.Lednicky, D.Marcisovsky, M.Polak, I.Popule, J.Tomasek, L.Tomasek, M.Ruzicka, P.Sicho, P.Chefdeville, M.Thomson, M. A.Smolik, J.Vrba, V.Zalesak, J.Belhorma, B.Ghazlane, H.Kotera, K.Ono, H.Takeshita, T.Uozumi, S.Chai, J. S.Ward, D. R.Song, H. S.Lee, S. H.Götze, M.Sauer, J.Weber, S.Zeitnitz, C.CALICE CollaborationSimon, F.Benchekroun, D.Hoummada, A.Khoulaki, Y.Apostolakis, J.Arfaoui, S.Benoit, M.Dannheim, D.Elsener, K.Drancourt, C.Folger, G.Grefe, C.Ivantchenko, V.Killenberg, M.Klempt, W.Kraaij, E van derLinssen, L.Lucaci-Timoce, A -IMünnich, A.Poss, S.Gaglione, R.Ribon, A.Roloff, P.Sailer, A.Schlatter, D.Sicking, E.Strube, J.Uzhinskiy, V.Cârloganu, C.Gay, P.Manen, S.Geffroy, N.Royer, L.Cornett, U.David, D.Ebrahimi, A.Falley, G.Feege, N.Gadow, K.Göttlicher, P.Günter, C.Hartbrich, O.Karyotakis, Y.Hermberg, B.Karstensen, S.Krivan, F.Krüger, K.Lu, S.Lutz, B.Morozov, S.Morgunov, V.Neubüser, C.Reinecke, M.Koletsou, I.Sefkow, F.Smirnov, P.Terwort, M.Fagot, A.Tytgat, M.Zaganidis, N.Hostachy, J -YMorin, L.Garutti, E.Laurien, S.Prast, J.Marchesini, I.Matysek, M.Ramilli, M.Briggl, K.Eckert, P.Harion, T.Schultz-Coulon, H -ChShen, W.Stamen, R.Chang, S.Vouters, G.Khan, A.Kim, D. H.Kong, D. J.Oh, Y. D.Bilki, B.Norbeck, E.Northacker, D.Onel, Y.Wilson, G. W.Kawagoe, K.The Time Structure of Hadronic Showers in Highly Granular Calorimeters with Tungsten and Steel Absorbersinfo:eu-repo/classification/ddc/610showers: hadroniccalorimeter: hadronicphotomultiplier: silicontungstenironscintillation counter: plasticsCALICEGEANTspatial resolutiontime resolutionabsorptionThe intrinsic time structure of hadronic showers influences the timing capability and the required integration time of hadronic calorimeters in particle physics experiments, and depends on the active medium and on the absorber of the calorimeter. With the CALICE T3B experiment, a setup of 15 small plastic scintillator tiles read out with Silicon Photomultipliers, the time structure of showers is measured on a statistical basis with high spatial and temporal resolution in sampling calorimeters with tungsten and steel absorbers. The results are compared to GEANT4 (version 9.4 patch 03) simulations with different hadronic physics models. These comparisons demonstrate the importance of using high precision treatment of low-energy neutrons for tungsten absorbers, while an overall good agreement between data and simulations for all considered models is observed for steel.Journal of Instrumentation 9(07), P07022 - P07022 (2014). doi:10.1088/1748-0221/9/07/P07022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst. of Physics2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205397https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04796%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000340050700043info:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1404.6454info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/9/07/P07022info:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2054232025-07-17T09:25:56Zec_fundedresourcesVDBopenaireengBarriobero-Vila, PereRequena, GuillermoBuslaps, ThomasAlfeld, MatthiasBoesenberg, UlrikeRole of element partitioning on the α–β phase transformation kinetics of a bi-modal Ti–6Al–6V–2Sn alloy during continuous heatinginfo:eu-repo/classification/ddc/670The role of element partitioning on the phase transformation kinetics of a bi-modal α + β Ti–6Al–6V–2Sn alloy is studied experimentally as a function of heating rate combining quantitative phase analysis with elemental analysis. The evolution of phase volume fractions and lattice parameters is investigated by in situ high energy synchrotron X-ray diffraction and conventional metallographic analysis. Synchrotron micro X-ray fluorescence and energy dispersive X-ray spectroscopy are applied to trace microstructural distribution of alloying elements during heating. The linear increase of the lattice parameters observed for all conditions at the beginning of the heating is associated to lattice thermal expansion. Thereafter, at intermediate temperatures, the alloy undergoes a β to α transformation for low heating rates. Element partitioning results in an enrichment of α and β by their respective stabilizing elements and a consequent nonlinear variation of the lattice parameters. As the temperature increases, α transforms into β up to the β-transus temperature. Microstructural evidences of the role of V during phase transformation are presented. Moreover, nonlinear variations of the β lattice parameter are related to the role of alloying elements on the different stages of element partitioning. The analysis of phase transformation kinetics combining laboratory and synchrotron-based techniques provides an advance in the current knowledge of the phase transformation kinetics of the Ti–6Al–6V–2Sn alloy that can help to develop new theoretical models and, consequently, knowledge-based thermal treatment optimization.Journal of alloys and compounds 626, 330 - 339 (2015). doi:10.1016/j.jallcom.2014.11.176info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205423https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04821%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jallcom.2014.11.176info:eu-repo/semantics/altIdentifier/issn/0925-8388info:eu-repo/semantics/altIdentifier/wos/WOS:000348025400053info:eu-repo/semantics/altIdentifier/issn/1873-4669info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2054262025-07-30T12:51:06Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKisonaite, MigleZubrienė, AstaČapkauskaitė, EditaSmirnov, AlexeySmirnovienė, JoanaKairys, VisvaldasMichailovienė, VilmaManakova, ElenaGražulis, SauliusMatulis, DaumantasIntrinsic Thermodynamics and Structure Correlation of Benzenesulfonamides with a Pyrimidine Moiety Binding to Carbonic Anhydrases I, II, VII, XII, and XIIIinfo:eu-repo/classification/ddc/500The early stage of drug discovery is often based on selecting the highest affinitylead compound. To this end the structural and energetic characterization of thebinding reaction is important. The binding energetics can be resolved into enthalpicand entropic contributions to the binding Gibbs free energy. Most compoundbinding reactions are coupled to the absorption or release of protons by the proteinor the compound. A distinction between the observed and intrinsic parameters ofthe binding energetics requires the dissection of the protonation/deprotonationprocesses. Since only the intrinsic parameters can be correlated with molecularstructural perturbations associated with complex formation, it is these parametersthat are required for rational drug design. Carbonic anhydrase (CA) isoforms areimportant therapeutic targets to treat a range of disorders including glaucoma,obesity, epilepsy, and cancer. For effective treatment isoform-specific inhibitors areneeded. In this work we investigated the binding and protonation energetics ofsixteen [(2-pyrimidinylthio)acetyl]benzenesulfonamide CA inhibitors usingisothermal titration calorimetry and fluorescent thermal shift assay. The compoundswere built by combining four sulfonamide headgroups with four tailgroups yielding16 compounds. Their intrinsic binding thermodynamics showed the limitations ofthe functional group energetic additivity approach used in fragment-based drugdesign, especially at the level of enthalpies and entropies of binding. Combinedwith high resolution crystal structural data correlations were drawn between thechemical functional groups on selected inhibitors and intrinsic thermodynamicparameters of CA-inhibitor complex formation.PLoS one 9(12), 1-26 (2014). doi:10.1371/journal.pone.0114106info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPLoS2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205426https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00003%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25493428info:eu-repo/semantics/altIdentifier/issn/1932-6203info:eu-repo/semantics/altIdentifier/wos/WOS:000346611400031info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0114106info:eu-repo/grantAgreement/EC//245721
oai:bib-pubdb1.desy.de:2054292025-07-30T12:51:04Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRutkauskas, KęstutisZubrienė, AstaGražulis, SauliusBeresnevičius, ZigmuntasMatulis, DaumantasTumosienė, IngridaKantminienė, KristinaKažemėkaitė, MarytėSmirnov, AlexeyKazokaitė, JustinaMorkūnaitė, VaidaČapkauskaitė, EditaManakova, Elena4-Amino-Substituted Benzenesulfonamides as Inhibitors of Human Carbonic Anhydrasesinfo:eu-repo/classification/ddc/540Abstract: A series of N-aryl-β-alanine derivatives and diazobenzenesulfonamides containingaliphatic rings were designed, synthesized, and their binding to carbonic anhydrases (CA) I,II, VI, VII, XII, and XIII was studied by the fluorescent thermal shift assay and isothermaltitration calorimetry. The results showed that 4-substituted diazobenzenesulfonamides weremore potent CA binders than N-aryl-β-alanine derivatives. Most of the N-aryl-β-alaninederivatives showed better affinity for CA II while diazobenzenesulfonamides possessednanomolar affinities towards CA I isozyme. X-ray crystallographic structures showed themodes of binding of both compound groups.Molecules 19(11), 17356 - 17380 (2014). doi:10.3390/molecules191117356info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionMDPI2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205429https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00006%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25353386info:eu-repo/semantics/altIdentifier/doi/10.3390/molecules191117356info:eu-repo/semantics/altIdentifier/wos/WOS:000345564300017info:eu-repo/semantics/altIdentifier/issn/1420-3049info:eu-repo/grantAgreement/EC//245721
oai:bib-pubdb1.desy.de:2054822021-11-10T11:58:57Zec_fundedresourcesVDBopenaireengVisser, SuzanneFurger, MarkusFlechsig, UweAppel, KarenDressler, RugardZotter, PeterSlowik, Jay GatesPrevot, Andre S. H.Baltensperger, UrsHighly Time- and Size-Resolved Measurements of Trace Elements during ClearfLoThe identification and quantification of particle sources has long proven challenging due to the complex composition ofambient aerosol. Measurements of trace elements provide unique source-specific information; e.g. barium and copper areemitted by traffic sources, while vanadium and nickel are linked to heavy oil combustion. Here we present highly time- andsize-resolved measurements of trace elements as part of the ClearfLo (Clean Air for London) 2012 field campaign, amultinational collaborative effort to investigate boundary layer pollution in and around London, UK.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion9th International Conference on Air Quality - Science and Application, Air Quality 2014, Garmisch-Partenkirchen, Germany, 2014-03-24 - 2014-03-282014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205482https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00046%22Researchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2054852025-07-30T12:51:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBohnenstengel, SIBelcher, SEBooth, AMChemel, C.Coceal, O.Di Marco, CFDubey, MKFaloon, KHFleming, ZLFurger, M.Gietl, JKGraves, RRAiken, A.Green, DCGrimmond, CSBHalios, CHHamilton, JFHarrison, RMHeal, MRHeard, DEHelfter, C.Herndon, SCHolmes, REAllan, JDHopkins, JRJones, AMKelly, FJKotthaus, S.Langford, B.Lee, JDLeigh, RJLewis, ACLidster, RTLopez-Hilfiker, FDAllen, G.McQuaid, JBMohr, C.Monks, PSNemitz, E.Ng, NLPercival, CJPrévôt, ASHRicketts, HMASokhi, R.Stone, D.Bacak, A.Thornton, JATremper, AHValach, ACVisser, S.Whalley, LKWilliams, LRXu, L.Young, DEZotter, P.Bannan, TJBarlow, JFBeddows, DCSBloss, WJMeteorology, air quality, and health in London: The ClearfLo projectinfo:eu-repo/classification/ddc/550The ClearfLo project provides integrated measurements of the meteorology, composition and particulate loading of London's urban atmosphere to improve predictive capability for air quality.Air quality and heat are strong health drivers and their accurate assessment and forecast are important in densely populated urban areas. However, the sources and processes leading to high concentrations of main pollutants such as ozone, nitrogen dioxide, and fine and coarse particulate matter in complex urban areas are not fully understood, limiting our ability to forecast air quality accurately. This paper introduces the ClearfLo project's interdisciplinary approach to investigate the processes leading to poor air quality and elevated temperatures.Within ClearfLo (www.clearflo.ac.uk), a large multi-institutional project funded by the UK Natural Environment Research Council (NERC), integrated measurements of meteorology, gaseous and particulate composition/loading within London's atmosphere were undertaken to understand the processes underlying poor air quality. Long-term measurement infrastructure installed at multiple levels (street and elevated), and at urban background, kerbside and rural locations were complemented with high-resolution numerical atmospheric simulations . Combining these (measurement/modeling) enhances understanding of seasonal variations in meteorology and composition together with the controlling processes. Two intensive observation periods (winter 2012 and summer Olympics 2012) focus upon the vertical structure and evolution of the urban boundary layer, chemical controls on nitrogen dioxide and ozone production, in particular the role of volatile organic compounds, and processes controlling the evolution, size, distribution and composition of particulate matter. The paper shows that mixing heights are deeper over London than in the rural surroundings and the seasonality of the urban boundary layer evolution controls when concentrations peak. The composition also reflects the seasonality of sources such as domestic burning and biogenic emissions.Bulletin of the American Meteorological Society 95, 140730113306003 - (2014). doi:10.1175/BAMS-D-12-00245.1info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Meteorological Society2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-05-31DEhttps://bib-pubdb1.desy.de/record/205485https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00049%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1520-0477info:eu-repo/semantics/altIdentifier/wos/WOS:000356870400002info:eu-repo/semantics/altIdentifier/issn/0003-0007info:eu-repo/semantics/altIdentifier/doi/10.1175/BAMS-D-12-00245.1info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2054972021-11-10T11:58:59Zec_fundedresourcesdriverVDBopen_accessopenaireengBagnaschi, EmanueleTowards precise predictions for Higgs-boson production in the MSSMWe study the production of scalar and pseudoscalar Higgs bosons via gluon fusion and bottom-quark annihilation in the MSSM. Relying on the NNLO-QCD calculation implemented in the public code SusHi, we provide precise predictions for the Higgs-production cross section in six benchmark scenarios compatible with the LHC searches. We also provide a detailed discussion of the sources of theoretical uncertainty in our calculation. We examine the dependence of the cross section on the renormalization and factorization scales, on the precise definition of the Higgs-bottom coupling and on the choice of PDFs, as well as the uncertainties associated to our incomplete knowledge of the SUSY contributions through NNLO. In particular, a potentially large uncertainty originates from uncomputed higher-order QCD corrections to the bottom-quark contributions to gluon fusion.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion573 WE-Heraeus-Seminar: Physics landscape after the Higgs discovery at the LHC, Bad Honnef, Germany, 2014-11-04 - 2014-11-072014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205497https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00061%22Researchersinfo:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//315877info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//321133
oai:bib-pubdb1.desy.de:2056042025-07-30T12:53:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMikulska, IuliiaValant, MatjazArčon, IztokLisjak, DarjaX-ray Absorption Spectroscopy Studies of the Room-Temperature Ferromagnetic Fe-Doped $\mathrm{6H-BaTiO_3}$info:eu-repo/classification/ddc/660We investigated the effect of annealing temperature on magnetic properties of 2% and 10% Fe-doped $BaTiO_{3}$. To understand the possible structural differences between samples treated at different annealing temperatures, and to correlate them with the magnetic properties, several characterization techniques, such as X-ray diffraction and X-ray absorption spectroscopic methods (XANES and EXAFS) were employed. We found that the 2% Fe-doped $BaTiO_{3}$ pseudocubic perovskite is paramagnetic regardless of the heat-treatment conditions. Initially paramagnetic 10% Fe-doped $6H–BaTiO_{3}$, treated at 1250°C, became ferromagnetic after additional annealing at higher temperature. We have crystalographically characterized the cation ordering processes in the $6H–BaTiO_{3}$ that occurred during the high-temperature annealing. The ferromagnetism that is induced in this stage is most probably associated with the observed diffusion processes but it extrinsic character still cannot be fully disregarded.Journal of the American Ceramic Society 99, 1-6 (2014). doi:10.1111/jace.13408info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-Blackwell2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-12-31DEhttps://bib-pubdb1.desy.de/record/205604https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00164%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0002-7820info:eu-repo/semantics/altIdentifier/wos/WOS:000352635100020info:eu-repo/semantics/altIdentifier/doi/10.1111/jace.13408info:eu-repo/semantics/altIdentifier/issn/1551-2916info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2056282025-07-30T09:23:28Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBijelic, AleksandarMolitor, ChristianMauracher, StephanAl-Oweini, RamiKortz, UlrichRompel, AnnetteHen Egg-White Lysozyme Crystallisation: Protein Stacking and Structure Stability Enhanced by a Tellurium(VI)-Centred Polyoxotungstateinfo:eu-repo/classification/ddc/540As synchrotron radiation becomes more intense, detectors become faster and structure-solving software becomes more elaborate, obtaining single crystals suitable for data collection is now the bottleneck in macromolecular crystallography. Hence, there is a need for novel and advanced crystallisation agents with the ability to crystallise proteins that are otherwise challenging. Here, an Anderson–Evans-type polyoxometalate (POM), specifically Na6[TeW6O24]⋅22 H2O (TEW), is employed as a crystallisation additive. Its effects on protein crystallisation are demonstrated with hen egg-white lysozyme (HEWL), which co-crystallises with TEW in the vicinity (or within) the liquid–liquid phase separation (LLPS) region. The X-ray structure (PDB ID: 4PHI) determination revealed that TEW molecules are part of the crystal lattice, thus demonstrating specific binding to HEWL with electrostatic interactions and hydrogen bonds. The negatively charged TEW polyoxotungstate binds to sites with a positive electrostatic potential located between two (or more) symmetry-related protein chains. Thus, TEW facilitates the formation of protein–protein interfaces of otherwise repulsive surfaces, and thereby the realisation of a stable crystal lattice. In addition to retaining the isomorphicity of the protein structure, the anomalous scattering of the POMs was used for macromolecular phasing. The results suggest that hexatungstotellurate(VI) has great potential as a crystallisation additive to promote both protein crystallisation and structure elucidation.ChemBioChem 16(2), 233 - 241 (2015). doi:10.1002/cbic.201402597info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205628https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00188%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25521080info:eu-repo/semantics/altIdentifier/doi/10.1002/cbic.201402597info:eu-repo/semantics/altIdentifier/wos/WOS:000347780800008info:eu-repo/semantics/altIdentifier/issn/1439-7633info:eu-repo/semantics/altIdentifier/issn/1439-4227info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2056322025-07-30T09:23:33Zec_fundedresourcesVDBopenaireengGoldansaz, H.Voleppe, Q.Piogé, S.Fustin, C. A.Gohy, J. F.Brassinne, J.Auhl, D.van Ruymbeke, E.Controlling the melt rheology of linear entangled metallo-supramolecular polymersinfo:eu-repo/classification/ddc/530We study in the melt the linear viscoelastic properties of supramolecular assemblies obtained by adding different amounts of nickel ions to linear entangled poly(ethylene oxide) (PEO) building blocks end-functionalized by a terpyridine group. We first show that the elasticity of these supramolecular assemblies is mainly governed by the entanglement dynamics of the building blocks, while the supramolecular interactions delay or suppress their relaxation. By adjusting the amount of metal ions, the relaxation time as well as the level of the low-frequency plateau of these supramolecular assemblies can be controlled. In particular, the addition of metal ions above the 1 : 2 metal ion/terpyridine stoichiometric ratio allows secondary supramolecular interactions to appear, which are able to link the linear supramolecular assemblies and thus, lead to the reversible gelation of the system. By comparing the rheological behavior of different linear PEO samples, bearing or not functionalized chain-ends, we show that these extra supramolecular bonds are partially due to the association between the excess of metal ions and the oxygen atoms of the PEO chains. We also investigate the possible role played by the terpyridine groups in the formation of these secondary supramolecular interactions.Soft matter 11(4), 762 - 774 (2015). doi:10.1039/C4SM02319Finfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRoyal Soc. of Chemistry2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205632https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00192%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000346911900015info:eu-repo/semantics/altIdentifier/issn/1744-6848info:eu-repo/semantics/altIdentifier/doi/10.1039/C4SM02319Finfo:eu-repo/semantics/altIdentifier/issn/1744-683Xinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25492131info:eu-repo/grantAgreement/EC//255604
oai:bib-pubdb1.desy.de:2056352025-07-30T12:52:58Zec_fundedresourcesVDBopenaireengWith, SebastianTrebbin, MartinBartz, Christian B. A.Neuber, ChristianDulle, MartinYu, ShunRoth, StephanSchmidt, Hans-WernerFoerster, StephanFast Diffusion-Limited Lyotropic Phase Transitions Studied in Situ Using Continuous Flow Microfluidics/Microfocus-SAXSinfo:eu-repo/classification/ddc/670Fast concentration-induced diffusion-limited lyotropic phase transitions can be studied in situ with millisecond time resolution using continuous flow microfluidics in combination with microfocus small-angle X-ray scattering. The method was applied to follow a classical selfassembly sequence where amphiphiles assemble into micelles, which subsequently assemble into an ordered lattice via a disorder/order transition. As a model system we selected the self-assembly of an amphiphilic block copolymer induced by the addition of a nonsolvent. Using microchannel hydrodynamic flow-focusing, large concentration gradients can be generated, leading to a deep quench from the miscible to the microphase-separated state. Within milliseconds the block copolymers assembly via a spinodal microphase separation into micelles, followed by a disorder/order transition into an FCC liquid-crystalline phase with late-stage domain growth and shear-induced domain orientation into a mesocrystal. A comparison with a slow macroscopic near-equilibrium kinetic experiment shows that the fast structural transitions follow a direct pathway to the equilibrium structure without the trapping of metastable states.Langmuir 30(42), 12494 - 12502 (2014). doi:10.1021/la502971minfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionACS Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205635https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00195%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000347744100005info:eu-repo/semantics/altIdentifier/issn/1520-5827info:eu-repo/semantics/altIdentifier/doi/10.1021/la502971minfo:eu-repo/semantics/altIdentifier/issn/0743-7463info:eu-repo/semantics/altIdentifier/pmid/pmid:25216394info:eu-repo/grantAgreement/EC//291211
oai:bib-pubdb1.desy.de:2056362021-11-10T12:00:10Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGalli, SilviaSzakacs, GaborLukac, FrantisekVlcek, MarianJimbo, RyoNaito, YoshihitoWennerberg, AnnHerzen, JuliaHammel, JoergWillumeit, RegineOsseointegration of resorbable magnesium screws – A SRμCT Studyinfo:eu-repo/classification/ddc/610The development of resorbable osteofixation materials that degrade upon substitution by regenerated tissue is highly desirable in orthopaedics. Magnesium is promising as implantable material, because of its biocompatibility, osteoconductivity and biodegradation under physiological conditions [1]. Through the selection of alloying elements, the mechanical properties and corrosion behaviour of magnesium can be modulated for application in load-bearing situations. The aim of our research was to investigate the bone integration and the corrosion process of Al-free Mg-alloys in vivo. Our hypothesis was that Mg-based implants stimulate bone growth.METHODS: Mini-screws of two different Mg- alloys, Mg10Gd and Mg-Y-RE (WE43) were manufactured at HZG. The cytocompatibility of the selected alloys was formerly tested and validated in vitro [2, 3]. The mini-screws were implanted in rats after ethical approval. After 1 and 3 months of healing, cylindrical bone-implant blocks were retrieved. Samples were imaged at the P05 Imaging Beamline (IBL) operated by HZG at PETRA III – DESY (Hamburg). We used monochromatic X-rays at 25 keV to take 900 projections and a field of view of 7mm x 1.8 mm, which resulted in 5X magnification with a resolution of ~2.5 μm. 3D data sets were computed using filtered back projection algorithms.RESULTS: The inserted implants healed without any observable adverse effect. On the basis of tomographic data, we were able to compute three- dimensional renderings of dvrscrews and bone with high contrast-to-noise ratios. A qualitative evaluation of the data revealed inhomogeneous surface corrosion of the screws, which maintained their original shape within the study period. New bone formation was observed in all of our samples. We found a considerable increase of implant-bone contact sites with progressing healing time. A quantitative analysis of the tomographic data indicated spatial differences in bone density. In proximity of the implant, newly formed bone matured and became dense after 3 months.Top: Horizontal (left) and vertical (right) sections of a screw after 3 months of healing. Fragments of implants, completely integrated in the bone, are visible. Bar 0.25 mm. Bottom: Orthogonal cut planes (left) and volume rendering (right), showing an implant (gray) into the bone (purple).DISCUSSION & CONCLUSIONS: The SRμCT showed osseointegration of Mg10Gd and WE43. Although the spatial resolution was not sufficient to fully elucidate the alloys microstructure, we observed the distribution of the high absorbing regions in the materials, possibly intermetallic phases and Y or RE oxides. The corrosion of the alloys was slow. Biocompatibility of the tested materials was confirmed by bone growth in intimate contact with the implants.REFERENCES: 1 Witte F,2 et al (2005) Biomaterials 26:3557-3563. Feyerabend F, Fischer J, et al (2010) Acta Biomater. 6:1834-1842. 3Johnson I, et al. H (2011) JBMR-A.ACKNOWLEDGEMENTS: Founding from the People Programme (Marie Curie Actions) Seventh Framework Programme FP7/2007-2013/ under REA grant agreements n° 289163 and n° 312284.European cells & materials 28(3), 64 (2014). doi:10.3204/PUBDB-2015-00196info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion6th Symposium on Biodegradable Metals, Maratea, Italy, 2014-08-24 - 2014-08-29AO fundation2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205636https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00196%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1473-2262info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-00196info:eu-repo/grantAgreement/EC//289163
oai:bib-pubdb1.desy.de:2056512025-07-30T12:53:00Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKasiuk, JuliaFedotova, JuliaPrzewoznik, J.Zukrowski, J.Sikora, M.Kapusta, Cz.Grce, A.Milosavljević, M.Growth-Induced Non-Planar Magnetic Anisotropy in $\mathrm{FeCoZr-CaF_{2}}$ Nanogranular Films: Structural and Magnetic Characterizationinfo:eu-repo/classification/ddc/530The relation between nanoscale structure, local atomic order and magnetic properties of $(FeCoZr)_{x}(CaF_{2})_{100−x} (29 ≤ x ≤ 73 at. %)$ granular films is studied as a function of metal/insulator fraction ratio. The films of a thickness of 1–6 μm were deposited on Al-foils and glass-ceramic substrates, by ion sputtering of targets of different metal/insulator contents. Structural characterization with X-ray and electron diffraction as well as transmission electron microscopy revealed that the films are composed of isolated nanocrystalline bcc $\alpha-FeCo(Zr)$ alloy and insulating fcc $CaF_{2}$ matrix. They grow in a columnar structure, where elongated metallic nanograins are arranged on top of each other within the columns almost normal to the substrate surface. Mössbauer spectroscopy and magnetometry results indicate that their easy magnetization axes are oriented at an angle of 65°–74° to the surface in films with x between 46 and 74, above the electrical percolation threshold, which is attributed to the growth-induced shape anisotropy. Interatomic distances characteristic for metallic state of $\alpha-FeCo(Zr)$ nanograins were revealed by X-ray Absorption Spectroscopy. The results show a lack of surface oxidation of the alloy nanograins, so the growth-induced orientation of nanograins in the films cannot be attributed to this effect. The study is among the first to report a growth-induced non-planar magnetic anisotropy in metal/insulator granular films above the percolation threshold and to reveal the origin of it.Journal of applied physics 116(4), 044301 (2014). doi:10.1063/1.4891016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Inst. of Physics2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205651https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00211%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4891016info:eu-repo/semantics/altIdentifier/issn/0021-8979info:eu-repo/semantics/altIdentifier/issn/0148-6349info:eu-repo/semantics/altIdentifier/issn/1089-7550info:eu-repo/semantics/altIdentifier/wos/WOS:000340710700077info:eu-repo/grantAgreement/EC//226716info:eu-repo/grantAgreement/EC//226470
oai:bib-pubdb1.desy.de:2057872021-11-10T12:00:32Zec_fundedresourcesdriverVDBopen_accessopenaireengKrause, BernwardCompact and low Consumption Magnet Design - The DESY ExperienceDuring the last ten years a variety of electromagnets has been ordered to upgrade the PETRAaccelerator into a synchrotron light source, to build up a new branch at the FLASH acceleratorfacility and to install the new European XFEL.The talk will give an overview of the ingredients which are necessary for developing andmanufacturing magnets. Two septum designs will be presented to discuss how electricitycosts can be reduced without losing machine performance. Furthermore design studies ofcombined function magnets and a permanent magnet design that could replace a quadrupoleelectromagnet to save energy costs will be shown.info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionWorkshop on Special Compact and Low Consumption Magnet Design, EuCard-2 WP3, CERN, Switzerland, 2014-11-26 - 2014-11-282014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205787https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00325%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2058912025-07-30T12:53:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSergeeva, OlgaVlasov, Petr S.Domnina, Nina S.Bogomolova, AnnaKonarev, PetrSvergun, DmitriWalterova, ZuzanaHorsky, JiriStepanek, PetrFilippov, SergeyNovel Thermosensitive Telechelic PEGs with Antioxidant Activity: Synthesis, Molecular Properties and Conformational Behaviourinfo:eu-repo/classification/ddc/540We report on the synthesis and solution properties of novel tailor-made polymer conjugates, which are highly compelling for biomedical applications due to their antioxidant activity and the potential to fine-tune their thermosensitive properties. These conjugates consist of polyethylene glycol (PEG) polymers containing antioxidant moieties, namely 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate or 2-benzamido-3-(3,5-di-tert-butyl-4-hydroxyphenyl)acrylate, as end groups that differ in activity and hydrophobicity. It was shown that all of the synthesized conjugates have low critical solution temperatures (LCSTs) characteristic of type II polymers on a phase diagram. By simply varying the PEG molecular weight, the solution properties, including the LCST value, could be easily tuned across a broad temperature range of 20-90 °C, providing an ideal method for the creation of thermosensitive polymers. It was also established that the LCST value and the polymer conjugate conformation depend on the antioxidant structure. From dynamic light scattering and small-angle X-ray scattering data, we were able to construct a complete sequence diagram of the conformational phase behaviour of the polymers with increasing temperature. It was observed that the conjugate conformation changes are the result of water shifting from a thermodynamically favourable solvent to an unfavourable one. This process then leads to compaction of the conjugate, followed by its aggregation.RSC Advances 4(79), 41763 – 41771 (2014). doi:10.1039/c4ra06978ainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRSC Publishing2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-08-27DEhttps://bib-pubdb1.desy.de/record/205891https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00428%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/2046-2069info:eu-repo/semantics/altIdentifier/wos/WOS:000342161600008info:eu-repo/semantics/altIdentifier/doi/10.1039/c4ra06978ainfo:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2058962025-07-30T12:53:39Zec_fundedresourcesVDBopenaireengBogomolova, AnnaFilippov, SergeyStarovoytova, LarysaAngelov, BorislavKonarev, PetrSvergun, DmitriSedlacek, OndrejHruby, MartinStepanek, PetrStudy of Complex Thermosensitive Amphiphilic Polyoxazolines and their Interaction with Ionic Surfactants. Are Hydrophobic, Thermosensitive, and Hydrophilic Moieties Equally Important?info:eu-repo/classification/ddc/530The temperature-driven self-assembly of nonionic amphiphilic tailor-made triblock copolymers has been studied by DLS, NMR, ITC, and SAXS. The composition of these triblock copolymers is more complex than that of the vast majority of poly(2-alkyl-2-oxazoline)s: A statistical thermoresponsive (iPrOx) and hydrophobic (BuOx) central block with terminal hydrophilic blocks (MeOx). In general, as temperature increases, nanoparticles form in a process starting with single molecules that become loose aggregates and ends with the formation of compact nanoparticles. Here, we first attempt to resolve the effects of each block on nanoparticle formation. It has been proven that the iPrOx/MeOx ratio determines the value of the cloud point temperature, whereas the different BuOx-iPrOx blocks determine the character of the process. Finally, we complete our investigation by presenting the thermodynamic and structural profiles of the complexation between these triblock poly(2-alkyl-2-oxazoline)s and two ionic surfactants. The addition of an ionic surfactant promotes a rearrangement of the polymer molecules and the formation of complexes followed by the appearance of polymer-surfactant hybrid micelles. Analysis of the interaction shows a strong and nonspecific reaction between the polymers and the anionic surfactant sodium dodecyl sulfate and weak but polymer-state-sensitive interactions between the polymer and the cationic surfactant hexadecyltrimethylammonium bromide.The journal of physical chemistry <Washington, DC> / B 118, 4940-4950 (2014). doi:10.1021/jp5011296info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205896https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00433%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp5011296info:eu-repo/semantics/altIdentifier/issn/1089-5647info:eu-repo/semantics/altIdentifier/pmid/pmid:24745928info:eu-repo/semantics/altIdentifier/wos/WOS:000335878000025info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2059092026-03-10T09:26:12Zec_fundedresourcesVDBopenaireengReschke, DetlefInfrastructure, Methods and Test Results for the Testing of 800 S.C. Accelerator Cavities for the European XFELinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionCRISP 3rd Annual Meeting, Grenoble, ESRF, France, 2014-06-02 - 2014-06-042014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205909https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00446%22Researchersinfo:eu-repo/grantAgreement/EC//283745
oai:bib-pubdb1.desy.de:2059492021-11-10T12:00:46Zec_fundedresourcesdriverVDBopen_accessopenaireengDorda, UlrichNews from SINBADinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionSeminar, DESY Zeuthen, 2014-05-27 - 2014-05-282014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205949https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00482%22Researchersinfo:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2059522025-07-30T12:53:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengĎurišin, J.Balga, D.Saksl, K.Pietriková, A.Atomic Structure of Cu-Zr-Ti Metallic Glasses Subjected to High Temperature Annealinginfo:eu-repo/classification/ddc/670Journal of alloys and compounds 608, 241 - 246 (2014). doi:10.1016/j.jallcom.2014.04.103info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205952https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00485%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000336602000040info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jallcom.2014.04.103info:eu-repo/semantics/altIdentifier/issn/0925-8388info:eu-repo/semantics/altIdentifier/issn/1873-4669info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2059612025-07-17T09:28:01Zec_fundedresourcesVDBopenaireengMilkovič, OndrejSaksl, KarelHagarová, MáriaMichalik, ŠtefanGamcová, JanaStructure Characterisation of Electrodeposited Ni-Co Alloyinfo:eu-repo/classification/ddc/670This paper is focused to structure characterization of two differently electrodeposited Ni-Co alloys on the copper surface. The chemical composition of the layers was determined by the EDX analysis in the scanning electron microscope. Phase analysis was realized by diffraction in the transmission mode using synchrotron radiation. Diffraction patterns also show the preferred orientation in the coating with saccharine addition.Materials science forum 782, 603 - 606 (2014). doi:10.4028/www.scientific.net/MSF.782.603info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion15th International Symposium on Metallography, Metallography 2013, Stara Lesna, Slovakia, 2013-04-24 - 2013-04-26Trans Tech Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/205961https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00494%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0255-5476info:eu-repo/semantics/altIdentifier/wos/WOS:000338978600114info:eu-repo/semantics/altIdentifier/doi/10.4028/www.scientific.net/MSF.782.603info:eu-repo/semantics/altIdentifier/issn/1662-9752info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2059752021-11-10T12:00:48Zopenaireopen_accessdriverVDBec_fundedresourcesdnbdeliveryengFCAL CollaborationAbramowicz, H.Chelkov, G.Coca, C.Daniluk, W.Dragone, A.Dumitru, L.Elsener, K.Emeliantchik, I.Firu, E.Fischer, J.Fiutowski, T.Abusleme, A.Ghenescu, V.Gostkin, M.Grzelak, G.Haller, G.Henschel, H.Ignatenko, A.Idzik, M.Ito, K.Kananov, S.Kielar, E.Afanaciev, K.Kollowa, S.Kotula, J.Krumstein, Z.Krupa, B.Kulis, S.Lange, W.Levy, A.Levy, I.Linssen, L.Lohmann, W.Aguilar, J.Lukic, S.Moron, J.Moszczynski, A.Nauenberg, U.Neagu, A.Novgorodova, O.Nuiry, F. -X.Ohlerich, M.Orlandea, M.Oleinik, G.Alvarez, E.Oliwa, K.Olshevski, A.Pandurovic, M.Pawlik, B.Preda, T.Przyborowski, D.Sato, Y.Sadeh, I.Sailer, A.Schumm, B.Bambade, P.Schuwalow, S.Schwartz, R.Smiljanic, I.Swientek, K.Takubo, Y.Teodorescu, E.Wierba, W.Yamamoto, H.Zawiejski, L.Zgura, T. -S.Bortko, L.Zhang, J.FCAL CollaborationBozovic-Jelisavcic, I.Castro, E.ECFA Detector R&D Panel, Review Reportactivity reportcalorimeter: electromagneticcalorimeter: designscattering: beam-beamelectronics: readoutelectronics: designILC CollbeamstrahlungCERN CLICnumerical calculations: Monte Carloperformancebackgroundluminosity: measurement methodsradiation: damageTwo special calorimeters are foreseen for the instrumentation of the very forward region of an ILC or CLIC detector; a luminometer (LumiCal) designed to measure the rate of low angle Bhabha scattering events with a precision better than 10$^{-3}$ at the ILC and 10$^{-2}$ at CLIC, and a low polar-angle calorimeter (BeamCal). The latter will be hit by a large amount of beamstrahlung remnants. The intensity and the spatial shape of these depositions will provide a fast luminosity estimate, as well as determination of beam parameters. The sensors of this calorimeter must be radiation-hard. Both devices will improve the e.m. hermeticity of the detector in the search for new particles. Finely segmented and very compact electromagnetic calorimeters will match these requirements. Due to the high occupancy, fast front-end electronics will be needed. Monte Carlo studies were performed to investigate the impact of beam-beam interactions and physics background processes on the luminosity measurement, and of beamstrahlung on the performance of BeamCal, as well as to optimise the design of both calorimeters. Dedicated sensors, front-end and ADC ASICs have been designed for the ILC and prototypes are available. Prototypes of sensor planes fully assembled with readout electronics have been studied in electron beams.Review Report 1-61 (2014).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/205975https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00508%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.4924info:eu-repo/grantAgreement/EC//262025
oai:bib-pubdb1.desy.de:2060622021-11-10T12:00:54Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDolan, Matthew J.McCabe, ChristopherKahlhoefer, FelixSchmidt-Hoberg, KaiA Taste of Dark Matter: Flavour Constraints on Pseudoscalar Mediatorsinfo:eu-repo/classification/ddc/530dark matter: interactiondark matter: mediationdark matter: couplingdark matter: relic densityinteraction: flavor changingnucleosynthesis: primordialmeson: rare decaypseudoscalar particle: intermediate statedirect detectionmodulationDAMAcosmological modelDark matter interacting via the exchange of a light pseudoscalar can induce observable signals in indirect detection experiments and experience large self-interactions while evading the strong bounds from direct dark matter searches. The pseudoscalar mediator will however induce flavour-changing interactions in the Standard Model, providing a promising alternative way to test these models. We investigate in detail the constraints arising from rare meson decays and fixed target experiments for different coupling structures between the pseudoscalar and Standard Model fermions. The resulting bounds are highly complementary to the information inferred from the dark matter relic density and the constraints from primordial nucleosynthesis. We discuss the implications of our findings for the dark matter self-interaction cross section and the prospects of probing dark matter coupled to a light pseudoscalar with direct or indirect detection experiments. In particular, we find that a pseudoscalar mediator can only explain the Galactic Centre excess if its mass is above that of the B mesons, and that it is impossible to obtain a sufficiently large direct detection cross section to account for the DAMA modulationBerlin : Springer (2014).info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206062https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00595%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1412.5174info:eu-repo/grantAgreement/EC//277591
oai:bib-pubdb1.desy.de:2061592026-03-10T09:26:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNavitski, AliaksandrElsen, EckhardSteder, LeaTamashevich, YegorWenskat, MarcFoster, BrianIversen, JensLaasch, RicardaMatheisen, AxelReschke, DetlefSchaffran, JoernSinger, XeniaSinger, WaldemarILC-HIGRADE Cavities as a Tool of the Quality Control for European XFELPart of the quality control (QC) and quality assurance(QA) scheme applied for achievement of the designedparameters of the European XFEL cavities is presented.Results of the first tests of QC cavities from the “ILC-HiGrade program” as well as examples of a feedback tothe cavity fabrication during the ramping up phase ispresented.Geneva : JACoW 212 - 215 (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion16th International Conference on RF Superconductivity, SRF 2013, Paris, France, 2013-09-23 - 2013-09-27JACoW2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206159https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00675%22Researchersinfo:eu-repo/grantAgreement/EC//283745info:eu-repo/grantAgreement/EC//206711
oai:bib-pubdb1.desy.de:2061672026-03-10T09:26:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNavitski, AliaksandrElsen, EckhardFoster, BrianLaasch, RicardaReschke, DetlefSchaffran, JoernSinger, WaldemarSinger, XeniaR&D on Cavity Treatments at DESY Towards the ILC Performance GoalAn extensive R&D programme on cavity investigationsand treatments towards ILC performance goal has beenestablished at DESY. A new “ILC-HiGrade Lab” is beingcommissioned and will house some existing and plannedcavity inspection and treatment tools. Aims and details ofthe program as well as the current status of the facility arereported.Geneva : JACoW 240 - 243 (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion16th International Conference on RF Superconductivity, SRF 2013, Paris, France, 2013-09-23 - 2013-09-27JACoW2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206167https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00681%22Researchersinfo:eu-repo/grantAgreement/EC//283745
oai:bib-pubdb1.desy.de:2062882025-07-30T12:54:46Zec_fundedresourcesVDBopenaireengPaszkowicz, WojciechErmakova, OlgaLópez-Solano, JavierMujica, AndresMunoz, AlfonsoMinikayev, RomanLathe, ChristianGierlotka, StanislawNikolaenko, IrinaDabkowska, HannaEquation of state of zircon-and scheelite-type dysprosium orthovanadates: a combined experimental and theoretical studyinfo:eu-repo/classification/ddc/530Dysprosium orthovanadate, DyVO4, belongs to a family of zircon-type orthovanadates showing a phase transition to scheelite-type structures at moderate pressures below 10 GPa. In the present study, the equations of state (EOSs) for both these phases were determined for the first time using high-pressure x-ray diffraction experiments and ab initio calculations based on the density functional theory. Structural parameters forscheelite-type DyVO4 were calculated from x-ray powder diffraction data as well. The high-pressure experiments were performed under pseudo-hydrostatic conditions at pressures up to 8.44 GPa and 5.5 GPa for the stable zircon-type and metastable (quenched) scheelite-type samples, respectively. Assuming as a compression model the Birch–Murnaghan EOS, we obtained the EOS parameters for both phases. The experimental bulk moduli .K0/ for zircon-type and scheelite-type DyVO4 are 118(4) GPa and 153(6) GPa, respectively. Theoretical equations of state were determined by ab initio calculations using the PBE exchange–correlation energy functional of Perdew, Burke, and Ernzerhof. These calculations provide K0 values of 126.1 GPa and 142.9 GPa for zircon-type and scheelite-type DyVO4, respectively. The reliability of the present experimental and theoretical results is supported by (i) the consistency between the values yielded by the two methods (the discrepancy in K0 is as low as about 7% for each of the studied polymorphs) and (ii) their similarity to results obtained under similar compression conditions (hydrostatic orpseudo-hydrostatic) for other rare-earth orthovanadates, such as YVO4 and TbVO4.Journal of physics / Condensed matter 26(2), 025401 (2014). doi:10.1088/0953-8984/26/2/025401info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/206288https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00793%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000328329700006info:eu-repo/semantics/altIdentifier/pmid/pmid:24305496info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/26/2/025401info:eu-repo/semantics/altIdentifier/issn/0953-8984info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2064192025-07-30T12:55:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSaito, HanaBañuls, Mari CarmenCichy, KrzysztofCirac, J. IgnacioJansen, KarlThe Temperature Dependence of the Chiral Condensate in the Schwinger model with Matrix Product Statesinfo:eu-repo/classification/ddc/530We present our recent results for the tensor network (TN) approach to lattice gauge theories. TN methods provide an efficient approximation for quantum many-body states. We employ TN for one dimensional systems, Matrix Product States, to investigate the 1-flavour Schwinger model. In this study, we compute the chiral condensate at finite temperature. From the continuum extrapolation, we obtain the chiral condensate in the high temperature region consistent with the analytical calculation by Sachs and Wipf.Proceedings of Science (2014). doi:10.22323/1.214.0302info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of The 32nd International Symposium on Lattice Field Theory — PoS(LATTICE2014) - Sissa Medialab Trieste, Italy, 2015. - ISBN - doi:10.22323/1.214.0302Proceedings of The 32nd International Symposium on Lattice Field Theory — PoS(LATTICE2014) - Sissa Medialab Trieste, Italy, 2015. - ISBN - doi:10.22323/1.214.0302<br/>The 32nd International Symposium on Lattice Field Theory, LATTICE2014, New York, USA, 2014-06-23 - 2014-06-28SISSA2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/206419https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00896%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.22323/1.214.0302info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1412.0596info:eu-repo/grantAgreement/EC//600645
oai:bib-pubdb1.desy.de:2064232025-07-30T12:55:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBruno, MattiaKorcyl, PiotrKorzec, TomaszLottini, StefanoSchaefer, StefanOn the Extraction of Spectral Quantities with open Boundary Conditionsinfo:eu-repo/classification/ddc/530We discuss methods to extract decay constants, meson masses and gluonic observables in the presence of open boundary conditions. The ensembles have been generated by the CLS effort and have 2+1 flavors of O(a)-improved Wilson fermions with a small twisted-mass term as proposed by L\'uscher and Palombi. We analyse the effect of the associated reweighting factors on the computation of different observables.Proceedings of Science (2014). doi:10.22323/1.214.0089info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionProceedings of The 32nd International Symposium on Lattice Field Theory — PoS(LATTICE2014) - Sissa Medialab Trieste, Italy, 2015. - ISBN - doi:10.22323/1.214.0089Proceedings of The 32nd International Symposium on Lattice Field Theory — PoS(LATTICE2014) - Sissa Medialab Trieste, Italy, 2015. - ISBN - doi:10.22323/1.214.0089<br/>The 32nd International Symposium on Lattice Field Theory, LATTICE2014, New York, USA, 2014-06-23 - 2014-06-28SISSA2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/206423https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00900%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.5207info:eu-repo/semantics/altIdentifier/issn/1824-8039info:eu-repo/semantics/altIdentifier/doi/10.22323/1.214.0089info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:2064472021-11-10T12:01:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengJansen, KarlSimma, HubertSommer, RainerTests of the Standard Model and Lattice Simulationsinfo:eu-repo/classification/ddc/500Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Publication Series of the John von Neumann Institute for Computing (NIC) 47, 453 pp. (2014).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionNIC series 47NIC series 47<br/>NIC Symposium 2014, Münster, Germany, 2014-02-12 - 2014-02-13Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206447https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00921%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-3-89336-933-1info:eu-repo/grantAgreement/EC//208740
oai:bib-pubdb1.desy.de:2065172025-07-30T12:55:21Zec_fundedresourcesVDBopenaireengUhlén, FredrikRahomäki, JussiNilsson, DanielSeiboth, FrankSanz, ClaudeWagner, UlrichRau, ChristophSchroer, ChristianVogt, UlrichRonchi test for Characterization of X-ray Nanofocusing Optics and Beamlinesinfo:eu-repo/classification/ddc/540A Ronchi interferometer for hard X-rays is reported in order to characterize the performance of the nanofocusing optics as well as the beamline stability. Characteristic interference fringes yield qualitative data on present aberrations in the optics. Moreover, the visibility of the fringes on the detector gives information on the degree of spatial coherence in the beamline. This enables the possibility to detect sources of instabilities in the beamline like vibrations of components or temperature drift. Examples are shown for two different nanofocusing hard X-ray optics: a compound refractive lens and a zone plate.Journal of synchrotron radiation 21(5), 1105 - 1109 (2014). doi:10.1107/S160057751401323Xinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIUCr2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/206517https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00987%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25177999info:eu-repo/semantics/altIdentifier/doi/10.1107/S160057751401323Xinfo:eu-repo/semantics/altIdentifier/issn/1600-5775info:eu-repo/semantics/altIdentifier/issn/0909-0495info:eu-repo/semantics/altIdentifier/wos/WOS:000341687000025info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2065322025-07-17T08:54:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGuzzi, MarcoLipka, KaterinaMoch, Sven-OlafTop-Quark Pair Production at Hadron Colliders: Differential Cross Section and Phenomenological Applications with DiffTopinfo:eu-repo/classification/ddc/530The results of phenomenological studies of top-quark pair production in proton-proton collisions are presented. Differential cross sections are calculated in perturbative QCD at approximate next-to-next-to-leading order ${\cal O}(\alpha_s^4)$ by using methods of threshold resummation beyond the leading logarithmic accuracy. Predictions for the single-particle inclusive kinematics are presented for transverse momentum and rapidity distributions of final-state top quarks. Uncertainties related to the description of proton structure, top-quark mass and strong coupling constant are investigated in detail. The results are compared to the recent measurements by the ATLAS and CMS collaborations at the LHC at the center of mass energy of 7 TeV. The calculation presented here is implemented in the computer code \textsc{Difftop} and can be applied to the general case of heavy-quark pair production at hadron-hadron colliders. For the first time, a fit of parton distribution functions at NNLO is performed by using the differential cross sections of top-quark pair production together with other data sets. The impact of the top-pair production on the precision of the gluon distribution at high scales is illustrated.The results of phenomenological studies of top-quark pair production in proton-proton collisions are presented. Differential cross sections are calculated in perturbative QCD at approximate next-to-next-to-leading order $ \mathcal{O}\left({\alpha}_s^4\right) $ by using methods of threshold resummation beyond the leading logarithmic accuracy. Predictions for the single-particle inclusive kinematics are presented for transverse momentum and rapidity distributions of final-state top quarks. Uncertainties related to the description of proton structure, top-quark mass and strong coupling constant are investigated in detail. The results are compared to the recent measurements by the ATLAS and CMS collaborations at the LHC at the center of mass energy of 7 TeV. The calculation presented here is implemented in the computer code Difftop and can be applied to the general case of heavy-quark pair production at hadron-hadron colliders. For the first time, a fit of parton distribution functions at NNLO is performed by using the differential cross sections of top-quark pair production together with other data sets. The impact of the top-pair production on the precision of the gluon distribution at high scales is illustrated.Journal of high energy physics 1501(1), 82 (2015). doi:10.1007/JHEP01(2015)082info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206532https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-00996%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP01(2015)082info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000348122500002info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-00996info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1406.0386info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2065362021-11-10T12:02:05Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphA European Perspective on Plasma Accelerationinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionWorkshop on Plasma Acceleration STFC, London, England, 2014-01-31 - 2014-01-312014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206536https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01000%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2065372025-07-17T09:25:32Zec_fundedresourcesVDBopenaireengWang, MeimeiTasan, C. C.Ponge, DirkDippel, A.-Ch.Raabe, D.Nanolaminate Transformation-Induced Plasticity-Twinning-Induced Plasticity steel with Dynamic Strain Partitioning and Enhanced damage Resistanceinfo:eu-repo/classification/ddc/670Conventional martensitic steels have limited ductility due to insufficient microstructural strain-hardening and damage resistance mechanisms. It was recently demonstrated that the ductility and toughness of martensitic steels can be improved without sacrificing the strength, via partial reversion of the martensite back to austenite. These improvements were attributed to the presence of the transformation-induced plasticity (TRIP) effect of the austenite phase, and the precipitation hardening (maraging) effect in the martensitic matrix. However, a full micromechanical understanding of this ductilizing effect requires a systematic investigation of the interplay between the two phases, with regards to the underlying deformation and damage micromechanisms. For this purpose, in this work, a Fe–9Mn–3Ni–1.4Al–0.01C (mass%) medium-Mn TRIP maraging steel is produced and heat-treated under different reversion conditions to introduce well-controlled variations in the austenite–martensite nanolaminate microstructure. Uniaxial tension and impact tests are carried out and the microstructure is characterized using scanning and transmission electron microscopy based techniques and post mortem synchrotron X-ray diffraction analysis. The results reveal that (i) the strain partitioning between austenite and martensite is governed by a highly dynamical interplay of dislocation slip, deformation-induced phase transformation (i.e. causing the TRIP effect) and mechanical twinning (i.e. causing the twinning-induced plasticity effect); and (ii) the nanolaminate microstructure morphology leads to enhanced damage resistance. The presence of both effects results in enhanced strain-hardening capacity and damage resistance, and hence the enhanced ductility.Acta materialia 85, 216 - 228 (2015). doi:10.1016/j.actamat.2014.11.010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/206537https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01001%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2014.11.010info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/wos/WOS:000348956800022info:eu-repo/grantAgreement/EC//290998
oai:bib-pubdb1.desy.de:2065382021-11-10T12:02:05Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphAccelerator R&D in Europeinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionHigh Energy Physics Advisory Panel Accelerator R&D Sub-Panel Meeting at SLAC National Accelerator Laboratory, HEPAP, Stanford, USA, 2014-08-29 - 2014-08-302014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206538https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01002%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2065472021-11-10T12:02:07Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphAdvanced Accelerator R&D Leading the Way?info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionUniversities meet Laboratories, Frankfurt, Frankfurt University, Germany, 2014-10-01 - 2014-10-012015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206547https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01011%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2065502021-11-10T12:02:07Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphR&D for Future Acceleratorsinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionEuropean Committee for Future Accelerators, ECFA, Geneva, CERN, Switzerland, 2014-11-21 - 2014-11-212014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206550https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01014%22Researchersinfo:eu-repo/grantAgreement/EC//653782
oai:bib-pubdb1.desy.de:2065512021-11-10T12:02:07Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphEuropean Network for Novel Accelerators (EuroNNAc2)info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionICAN Meeting, ICAN2014, Palaiseau, France, 2014-04-28 - 2014-04-282014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206551https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01015%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2065522021-11-10T12:02:07Zec_fundedresourcesVDBopenaireengAssmann, RalphHolzer, B.Ferrario, M.Osterhoff, JensSeryi, A.Specka, A.European Network for Novel Accelerators (EuroNNAc2), WP7info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion1st Enhanced European Coordination for Accelerator R&D Annual Meeting, EuCARD2, Hamburg, Germany, 2014-05-19 - 2014-05-232014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/206552https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01016%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2065532021-11-10T12:02:08Zopenaireopen_accessdriverVDBec_fundedresourcesdnbdeliveryengde Blas, JorgeChala, MikaelPerez-Victoria, ManuelSantiago, JoseObservable Effects of General New Scalar Particlesinfo:eu-repo/classification/ddc/530We classify all possible new scalar particles that can have renormalizable linear couplings to Standard Model fields and therefore be singly produced at colliders. We show that this classification exhausts the list of heavy scalar particles that contribute at the tree level to the Standard Model effective Lagrangian to dimension six. We compute this effective Lagrangian for a general scenario with an arbitrary number of new scalar particles and obtain flavor-preserving constraints on their couplings and masses. This completes the tree-level matching of the coefficients of dimension five and six operators in the effective Lagrangian to arbitrary extensions of the Standard Model.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206553https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01017%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1412.8480info:eu-repo/grantAgreement/EC//279972info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2065572025-07-30T12:55:53Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHatsuda, YasuyukiWilson loop OPE, analytic continuation and multi-Regge limitinfo:eu-repo/classification/ddc/530expansion: collinearsupersymmetry: 4gauge field theory: Yang-Millsmulti-Reggeoperator product expansionWilson loopscattering amplitudestrong couplingBFKL equationkinematicsWe explore a direct connection between the collinear limit and the multi-Regge limit for scattering amplitudes in the $ \mathcal{N} $ = 4 super Yang-Mills theory. Starting with the collinear expansion for the six-gluon amplitude in the Euclidean kinematic region, we perform an analytic continuation term by term to the so-called Mandelstam region. We find that the result coincides with the collinear expansion of the analytically continued amplitude. We then take the multi-Regge limit, and conjecture that the final result precisely reproduces the one from the BFKL approach. Combining this procedure with the OPE for null polygonal Wilson loops, we explicitly compute the leading contribution in the “collinear-Regge” limit up to five loops. Our results agree with all the known results up to four loops. At five-loop, our results up to the next-to-next-to-leading logarithmic approximation (NNLLA) also reproduce the known results, and for the N$^{3}$LLA and the N$^{4}$LLA give non-trivial predictions. We further present an all-loop prediction for the imaginary part of the next-to-double-leading logarithmic approximation. Our procedure has a possibility of an interpolation from weak to strong coupling in the multi-Regge limit with the help of the OPE.Journal of high energy physics 2014(10), 38 (2014). doi:10.1007/JHEP10(2014)038info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206557https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01021%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP10(2014)038info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1404.6506info:eu-repo/semantics/altIdentifier/wos/WOS:000343662900001info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2065592021-11-10T12:02:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGrassi, AlbaHatsuda, YasuyukiMarino, MarcosTopological Strings from Quantum Mechanicsstring: topologicalspace: Calabi-Yaustring model: topologicaloperator: spectrumcorrection: nonperturbativespectralquantum mechanicsquantizationdeterminantmembrane modelFermi gasorbifoldWe propose a general correspondence which associates a non-perturbative quantum-mechanical operator to a toric Calabi-Yau manifold, and we conjecture an explicit formula for its spectral determinant in terms of an M-theoretic version of the topological string free energy. As a consequence, we derive an exact quantization condition for the operator spectrum, in terms of the vanishing of a generalized theta function. The perturbative part of this quantization condition is given by the Nekrasov-Shatashvili limit of the refined topological string, but there are non-perturbative corrections determined by the conventional topological string. We analyze in detail the cases of local P2, local P1xP1 and local F1. In all these cases, the predictions for the spectrum agree with the existing numerical results. We also show explicitly that our conjectured spectral determinant leads to the correct spectral traces of the corresponding operators, which are closely related to topological string theory at orbifold points. Physically, our results provide a Fermi gas picture of topological strings on toric Calabi-Yau manifolds, which is fully non-perturbative and background independent. They also suggest the existence of an underlying theory of M2 branes behind this formulation. Mathematically, our results lead to precise, surprising conjectures relating the spectral theory of functional difference operators to enumerative geometry.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206559https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01023%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.3382info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2065602021-11-10T12:02:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGrassi, AlbaHatsuda, YasuyukiMarino, MarcosQuantization Conditions and Functional Equations in ABJ(M) Theoriesspectralpartition functionquantizationHamiltonianChern-Simons termWKB approximationsupersymmetrydeterminantFermi gasABJM modelThe partition function of ABJ(M) theories on the three-sphere can be regarded as the canonical partition function of an ideal Fermi gas with a non-trivial Hamiltonian. We propose an exact expression for the spectral determinant of this Hamiltonian, which generalizes recent results obtained in the maximally supersymmetric case. As a consequence, we find an exact WKB quantization condition determining the spectrum which is in agreement with numerical results. In addition, we investigate the factorization properties and functional equations for our conjectured spectral determinants. These functional equations relate the spectral determinants of ABJ theories with consecutive ranks of gauge groups but the same Chern-Simons coupling.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/206560https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01024%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.7658info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2070562025-07-30T12:56:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengH.E.S.S. CollaborationAbramowski, A.Becherini, Y.Kieffer, M.Klepser, S.Klochkov, D.Kluźniak, W.Kolitzus, D.Komin, Nu.Kosack, K.Krakau, S.Krayzel, F.Krueger, PeterBecker Tjus, J.Laffon, H.Lamanna, G.Lefaucheur, J.Lefranc, V.Lemière, A.Lemoine-Goumard, M.Lenain, J.-P.Lohse, T.Lopatin, A.Lu, C.-C.Berge, D.Marandon, V.Marcowith, A.Marx, R.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Méhault, J.Meintjes, P. J.Menzler, U.Bernhard, S.Meyer, ManuelMitchell, AlisonModerski, R.Mohamed, M.Morå, K.Moulin, E.Murach, T.de Naurois, M.Niemiec, J.Nolan, S. J.Bernloehr, K.Oakes, L.Odaka, H.Ohm, S.Opitz, B.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Paz Arribas, M.Pekeur, N. W.Birsin, E.Pelletier, G.Perez, J.Petrucci, P.-O.Peyaud, B.Pita, S.Poon, H.Puehlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Biteau, J.Reichardt, I.Reimer, A.Reimer, O.Renaud, M.de los Reyes, R.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Böttcher, M.Rudak, B.Rulten, C. B.Sahakian, V.Salek, D.Sanchez, DanielSantangelo, A.Schlickeiser, R.Schuessler, F.Schulz, A.Schwanke, U.Boisson, C.Schwarzburg, S.Schwemmer, S.Sol, H.Spanier, F.Spengler, G.Spies, F.Stawarz, Ł.Steenkamp, R.Stegmann, C.Stinzing, F.Bolmont, J.Stycz, K.Sushch, I.Tavernet, J.-P.Tavernier, T.Taylor, A. M.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.Aharonian, F.Bordas, P.van Soelen, B.Vasileiadis, G.Veh, J.Venter, C.Viana, A.Vincent, P.Vink, J.Voelk, H. J.Volpe, F.Vorster, M.Bregeon, J.Vuillaume, T.Wagner, S. J.Wagner, P.Wagner, R. M.Ward, M.Weidinger, M.Weitzel, Q.White, R.Wierzcholska, A.Willmann, P.Brun, F.Wörnlein, A.Wouters, D.Yang, R.Zabalza, V.Zaborov, D.Zacharias, M.Zdziarski, A. A.Zech, A.Zechlin, H.-S.Brun, P.Bryan, M.Bulik, T.Carrigan, S.Casanova, S.Chadwick, P. M.Chakraborty, N.Ait Benkhali, F.Chalme-Calvet, R.Chaves, R. C. G.Chrétien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Davids, I. D.Akhperjanian, A. G.Degrange, B.Deil, C.deWilt, P.Djannati-Ataï, A.Domainko, W.Donath, A.Drury, L. O’C.Dubus, G.Dutson, K.Dyks, J.Angüner, E. O.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Backes, M.Fiasson, A.Fontaine, G.Förster, A.Füßling, M.Gabici, S.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Balenderan, S.Glicenstein, J. F.Gottschall, D.Grondin, M.-H.Grudzińska, M.Hadsch, D.Häffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Balzer, A.Hermann, G.Hervet, O.Hillert, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Ivascenko, A.Jacholkowska, A.Barnacka, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Jung, I.Kastendieck, MaxKatarzyński, K.Katz, U.Kaufmann, S.Khélifi, B.Long-term monitoring of PKS 2155−304 with ATOM and H.E.S.S.: investigation of optical/$\gamma$-ray correlations in different spectral statesinfo:eu-repo/classification/ddc/520In this paper we report on the analysis of all the available optical and very high-energy $\gamma$-ray ($>$200 GeV) data for the BL Lac object PKS 2155$-$304, collected simultaneously with the ATOM and H.E.S.S. telescopes from 2007 until 2009. This study also includes X-ray (RXTE, Swift) and high-energy $\gamma$-ray (Fermi-LAT) data. During the period analysed, the source was transitioning from its flaring to quiescent optical states,and was characterized by only moderate flux changes at different wavelengths on the timescales of days and months. A flattening of the optical continuum with an increasing optical flux can be noted in the collected dataset, but only occasionally and only at higher flux levels. We did not find any universal relation between the very high-energy $\gamma$-ray and optical flux changes on the timescales from days and weeks up to several years. On the other hand, we noted that at higher flux levels the source can follow two distinct tracks in the optical flux-colour diagrams, which seem to be related to distinct $\gamma$-ray states of the blazar. The obtained results therefore indicate a complex scaling between the optical and $\gamma$-ray emission of PKS 2155$-$304, with different correlation patterns holding at different epochs, and a $\gamma$-ray flux depending on the combination of an optical flux and colour rather than a flux alone.Astronomy and astrophysics 571, A39 - (2014). doi:10.1051/0004-6361/201424142info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEDP Sciences2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207056https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01059%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.0253info:eu-repo/semantics/altIdentifier/wos/WOS:000345282600058info:eu-repo/semantics/altIdentifier/issn/1432-0746info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201424142info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:2070712025-07-17T09:26:10Zdnbdeliveryec_fundedresourcesdriveropenaireopen_accessVDBengAblinger, J.Blümlein, J.De Freitas, A.Hasselhuhn, A.von Manteuffel, AndreasRound, M.Schneider, C.The $O(\alpha_s^3 T_F^2)$ contributions to the gluonic operator matrix elementinfo:eu-repo/classification/ddc/530The $O(\alpha_s^3 T_F^2 C_F (C_A))$ contributions to the transition matrix element $A_{gg,Q}$ relevant for the variable flavor number scheme at 3--loop order are calculated. The corresponding graphs contain two massive fermion lines of equal mass leading to terms given by inverse binomially weighted sums beyond the usual harmonic sums. In $x$-space two root-valued letters contribute in the iterated integrals in addition to those forming the harmonic polylogarithms. We outline technical details needed in the calculation of graphs of this type, which are as well of importance in the case of two different internal massive lines.Nuclear physics <Amsterdam> / B 885, 280 - 317 (2014). doi:10.1016/j.nuclphysb.2014.05.028info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207071https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01068%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.05.028info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.4259info:eu-repo/semantics/altIdentifier/wos/WOS:000339598300015info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01068info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/grantAgreement/EC//264564info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2070952025-07-30T12:56:15Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDudas, EmilianThree-Form Multiplet and Inflationinfo:eu-repo/classification/ddc/530differential forms: 3transformation: gaugeinflation: modelinflatonstabilitymultipletstring modelsupergravityMost successful models of inflation in supergravity have a shift symmetry for the inflaton and contain a stabilizer field coupled to the inflaton in a particular way. We argue that the natural interpretation of the stabilizer, from the viewpoint of the shift symmetry, is a three-form multiplet. Its coupling to the inflaton is uniquely determined by the shift symmetry and the invariance under three-form gauge transformations and has a natural string theory interpretation.Journal of high energy physics 2014(12), 14 (2014). doi:10.1007/JHEP12(2014)014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207095https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01081%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP12(2014)014info:eu-repo/semantics/altIdentifier/wos/WOS:000345920000003info:eu-repo/grantAgreement/EC//226371
oai:bib-pubdb1.desy.de:2070962025-07-30T12:56:28Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBah, IbrahimaGabella, MaximeHalmagyi, NickBPS M5-Branes as Defects for the 3d-3d Correspondenceinfo:eu-repo/classification/ddc/530geodesicBPSanti-de Sitterdefectgauge field theorysupersymmetryR symmetryconformaldualityWe study supersymmetric probe M5-branes in the AdS$_{4}$ solution that arises from M5-branes wrapped on a hyperbolic 3-manifold M$_{3}$. This amounts to introducing internal defects within the framework of the 3d-3d correspondence. The BPS condition for a probe M5-brane extending along all of AdS$_{4}$ requires it to wrap a surface embedded in an S$^{2}$-fibration over M$_{3}$. We find that the projection of this surface to M$_{3}$ can be either a geodesic or a tubular surface around a geodesic. These configurations preserve an extra U(1) symmetry, in addition to the one corresponding to the R-symmetry of the dual 3d $ \mathcal{N}=2 $ gauge theory. BPS M2-branes can stretch between M5-branes wrapping geodesics. We interpret the addition of probe M5-branes on a closed geodesic in terms of conformal Dehn surgery.Journal of high energy physics 2014(11), 112 (2014). doi:10.1007/JHEP11(2014)112info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207096https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01082%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.0403info:eu-repo/semantics/altIdentifier/wos/WOS:000345409400002info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP11(2014)112info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2070982025-07-30T12:56:28Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBah, IbrahimaGabella, MaximeHalmagyi, NickPunctures from Probe M5-Branes and $\mathcal{N}= 1$ Superconformal Field Theoriesinfo:eu-repo/classification/ddc/530field theory: conformalmembrane model: fractionalM-theory: solutionRiemann surfaceanti-de Sittermoduli spacecentral chargekappa symmetrysupersymmetrydualityBPSWe study probe M5-branes in N=1 AdS5 solutions of M-theory that arise from M5-branes wrapped on a Riemann surface. Using the BPS condition from kappa-symmetry, we classify supersymmetric probe M5-branes that extend along all of AdS5 and intersect the Riemann surface at points. These can be viewed as punctures in the dual N=1 superconformal field theories. We find M5-branes that correspond to the two types of simple punctures previously studied in field theory. In addition, when the central charge is rational, we find a new class of M5-branes with a moduli space that includes two internal dimensions in addition to the Riemann surface. These new M5-branes have the essential characteristic of fractional branes, in that a single one at a generic point of its moduli space becomes multiple M5-branes at special points.Journal of high energy physics 2014(7), 131 (2014). doi:10.1007/JHEP07(2014)131info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207098https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01084%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2014)131info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.6687info:eu-repo/semantics/altIdentifier/wos/WOS:000346568800006info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2071002025-07-30T12:56:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMeneghelli, CarloYang, GangMayer-Cluster Expansion of Instanton Partition Functions and Thermodynamic Bethe Ansatzinfo:eu-repo/classification/ddc/530Bethe ansatz: thermodynamicalinstanton: partition functioninstanton: expansiongauge field theory: quivermodel: integrabilitypath integralIn arXiv:0908.4052, Nekrasov and Shatashvili pointed out that the N=2 instanton partition function in a special limit of the Omega-deformation parameters is characterized by certain thermodynamic Bethe ansatz (TBA) like equations. In this work we present an explicit derivation of this fact as well as generalizations to quiver gauge theories. To do so we combine various techniques like the iterated Mayer expansion, the method of expansion by regions, and the path integral tricks for non-perturbative summation. The TBA equations derived entirely within gauge theory have been proposed to encode the spectrum of a large class of quantum integrable systems. We hope that the derivation presented in this paper elucidates further this completely new point of view on the origin, as well as on the structure, of TBA equations in integrable models.Journal of high energy physics 2014(5), 112 (2014). doi:10.1007/JHEP05(2014)112info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207100https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01086%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.4537info:eu-repo/semantics/altIdentifier/wos/WOS:000337346300001info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP05(2014)112info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2071022025-07-17T09:27:19Zec_fundedresourcesVDBopenaireengCardoso, VitorPorto, Rafael A.Analytic Approximations, Perturbation Theory, Effective Field Theory Methods and their Applicationsinfo:eu-repo/classification/ddc/530effective field theoryperturbation theoryEinstein equationgravitationWe summarize the parallel session B4: 'Analytic approximations, perturbation theory effective field theory methods and their applications' and the joint session B2/B4: 'Approximate solutions to Einstein equations: Methods and Applications', of the GR20 & Amaldi10 conference in Warsaw, July 2013. The contributed talks reported significant advances on various areas of research in gravity.General relativity and gravitation 46(5), 1682 (2014). doi:10.1007/s10714-014-1682-6info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer Science + Business Media B.V.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207102https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01088%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1572-9532info:eu-repo/semantics/altIdentifier/wos/WOS:000336023900001info:eu-repo/semantics/altIdentifier/doi/10.1007/s10714-014-1682-6info:eu-repo/semantics/altIdentifier/issn/0001-7701info:eu-repo/grantAgreement/EC//256667
oai:bib-pubdb1.desy.de:2071062025-07-30T12:56:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFerro, LiviaLukowski, TomaszMeneghelli, CarloPlefka, JanStaudacher, MatthiasSpectral Parameters for Scattering Amplitudes in $ \mathcal{N} $ = 4 Super Yang-Mills Theoryinfo:eu-repo/classification/ddc/530supersymmetry: 4dimension: 4model: integrabilityinvariance: Yangiansymmetry: Yangiangauge field theory: Yang-Millsspectralanomalous dimensioninfrared problemdeformationYang-Mills: supersymmetryscattering amplitude: on-shellPlanar N=4 Super Yang-Mills theory appears to be a quantum integrable four-dimensional conformal theory. This has been used to find equations believed to describe its exact spectrum of anomalous dimensions. Integrability seemingly also extends to the planar space-time scattering amplitudes of the N=4 model, which show strong signs of Yangian invariance. However, in contradistinction to the spectral problem, this has not yet led to equations determining the exact amplitudes. We propose that the missing element is the spectral parameter, ubiquitous in integrable models. We show that it may indeed be included into recent on-shell approaches to scattering amplitude integrands, providing a natural deformation of the latter. Under some constraints, Yangian symmetry is preserved. Finally we speculate that the spectral parameter might also be the regulator of choice for controlling the infrared divergences appearing when integrating the integrands in exactly four dimensions.Journal of high energy physics 2014(1), 94 (2014). doi:10.1007/JHEP01(2014)094info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207106https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01092%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP01(2014)094info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000330646000007info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1308.3494info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2071102025-07-17T09:27:39ZdnbdeliveryVDBopenaireopen_accessdriverec_fundedresourcesengLorkiewicz, JerzyNietubyć, RobertBarlak, MarekMirowski, RobertBartnik, AndrzejKostecki, JerzySekutowicz, JacekMalinowska, AnetaKneisel, PeterWitkowski, JanDeposition and Optimization of Thin Lead Layers for Superconducting Accelerator Photocathodesinfo:eu-repo/classification/ddc/530A combination of a ultra high vacuum arc deposition system and a recrystallization method was used to optimize the smoothness and thickness of thin-layer lead cathodes for superconducting niobium electron injectors. A non-filtered arc system was chosen to deposit Pb films on niobium. The films then underwent melting and recrystallization by treating them with pulsed argon ion beams in a rod plasma injector.Physica scripta T161, 014071 (2014). doi:10.1088/0031-8949/2014/T161/014071info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIoP Publ.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207110https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01095%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000339620200072info:eu-repo/semantics/altIdentifier/issn/0031-8949info:eu-repo/semantics/altIdentifier/issn/1402-4896info:eu-repo/semantics/altIdentifier/doi/10.1088/0031-8949/2014/T161/014071info:eu-repo/grantAgreement/EC//227579
oai:bib-pubdb1.desy.de:2071242025-07-17T09:26:24Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBytev, Vladimir V.Kalmykov, MikhailMoch, Sven-OlafHYPERDIRE: HYPERgeometric Functions DIfferential REduction: MATHEMATICA based Packages for Differential Reduction of Generalized Hypergeometric Functions: $F_D$ and $F_S$ Horn-type Hypergeometric functions of three variablesinfo:eu-repo/classification/ddc/004HYPERDIRE is a project devoted to the creation of a set of Mathematica based programs for the differential reduction of hypergeometric functions. The current version includes two parts: the first one, FdFunction, for manipulations with Appell hypergeometric functions $F_D$ of $r$ variables; and the second one, FsFunction, for manipulations with Lauricella-Saran hypergeometric functions $F_S$ of three variables. Both functions are related with one-loop Feynman diagrams.Computer physics communications 185(11), 3041-3058 (2014). doi:10.1016/j.cpc.2014.07.014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth Holland Publ. Co.2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207124https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01109%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0010-4655info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1312.5777info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cpc.2014.07.014info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2071312025-07-17T09:25:30Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBenecke, GunthardWagermaier, WolfgangTrebbin, MartinFörster, StephanParis, OskarRoth, Stephan V.Fratzl, PeterLi, ChenghaoSchwartzkopf, MatthiasFlucke, GeroHoerth, RebeccaZizak, IvoBurghammer, ManfredMetwalli, EzzeldinMüller-Buschbaum, PeterA Customizable Software for Fast Reduction and Analysis of Large X-Ray Scattering Data Sets: Applications of the New DPDAK Package to Small-Angle X-Ray Scattering and Grazing-Incidence Small-Angle X-Ray scatteringinfo:eu-repo/classification/ddc/540Journal of applied crystallography 47(5), 1797 - 1803 (2014). doi:10.1107/S1600576714019773info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionMunksgaard2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207131https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01116%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000342845900039info:eu-repo/semantics/altIdentifier/issn/1600-5767info:eu-repo/semantics/altIdentifier/issn/0021-8898info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600576714019773info:eu-repo/semantics/altIdentifier/pmid/pmid:25294982info:eu-repo/grantAgreement/EC//291211
oai:bib-pubdb1.desy.de:2071342025-07-17T09:25:42Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAckermann, MarkusAjello, 1 M.Bissaldi, 4 E.Kuss, 46 M.Larsson, 4 S.2122Latronico, 49 L.Lemoine-Goumard, 50 M.44Longo, 51 F.6Loparco, 7 F.Blandford, 10 R. D.30Lott, 15 B.Lovellette, 44 M. N.Lubrano, 19 P.36Manfreda, 37 A.Martin, 4 P.Massaro, 46 F.Mayer, MichaelMazziotta, 1 M. N.Bloom, 3 E. D.McEnery, 15 J. E.11Michelson, 32 P. F.Mitthumsiri, 3 W.53Mizuno, 3 T.Monzani, 54 M. E.Morselli, 3 A.Moskalenko, 55 I. V.Murgia, 3 S.Bottacini, 3 E.Nemmen, 56 R.1131Nuss, 41 E.Ohsugi, 12 T.Omodei, 54 N.Orienti, 3 M.Orlando, 26 E.Ormes, 3 J. F.Paneque, 57 D.Brandt, 3 T. J.58Panetta, 3 J. H.Perkins, 3 J. S.Pesce-Rollins, 11 M.Piron, 4 F.Pivato, 12 G.Porter, 9 T. A.Rainò, 3 S.30Rando, 15 R.Bregeon, 11 J.8Razzano, 9 M.4Razzaque, 59 S.Reimer, 60 A.39Reimer, 3 O.39Reposeur, 3 T.Saz Parkinson, 44 P. M.Bruel, 12 P.61Schaal, 62 M.Schulz, AnneliSgrò, 1 C.Siskind, 4 E. J.Spandre, 64 G.Spinelli, 4 P.30Stawarz, 15 Ł.65Buehler, RolfSuson, 66 D. J.Takahashi, 67 H.Tanaka, 35 T.Thayer, 68 J. G.Thayer, 3 J. B.Thompson, 3 D. J.Tibaldo, 11 L.Tinivella, 3 M.Torres, 4 D. F.69Buson, 1 S.Tosti, 70 G.36Troja, 37 E.11Uchiyama, 32 Y.Vianello, 71 G.Winer, 3 B. L.Wolff, 72 M. T.Wood, 19 D. L.Wood, 73 ‡ K. S.8Wood, 19 M.Charbonnel, 3 S.Corbet, 74 R. H. D.31De Gennaro Aquino, 41 I.75Edlin, 76 J. P.Mason, 77 E.Schwarz, 78 G. J.Shore, 79 S. N.Albert, 2 A.Caliandro, 9 G. A.4Starrfield, 75 † S.Teyssier 8, 80 F.Fermi-LAT Collaboration3Cameron, 14 R. A.Caragiulo, 3 M.Caraveo, 15 P. A.Cavazzuti, 16 E.Charles, 17 E.Chekhtman, 3 A.Cheung, 18 ‡ C. C.Chiang, 19 † J.Baldini, 3 L.Chiaro, 3 G.Ciprini, 9 S.17Claus, 20 R.Cohen-Tanugi, 3 J.Conrad, 12 J.212223Corbel, 24 S.Ballet, 4 J.5D'Ammando, 25 F.26de Angelis, 27 A.den Hartog, 28 P. R.de Palma, 3 F.Dermer, 15 C. D.Desiante, 19 R.6Digel, 29 S. W.Barbiellini, 5 G.Di Venere, 3 L.do Couto e Silva, 30 E.Donato, 3 D.31Drell, 32 P. S.Drlica-Wagner, 3 A.Favuzzi, 33 C.30Ferrara, 15 E. C.Focke, 11 W. B.6Franckowiak, 3 A.Fuhrmann, 3 L.Fukazawa, 34 Y.Fusco, 35 P.30Gargano, 15 F.Gasparrini, 15 D.17Germani, 20 S.36Bastieri, 7 D.Giglietto, 37 N.30Giordano, 15 F.30Giroletti, 15 M.Glanzman, 26 T.Godfrey, 3 G.Grenier, 3 I. A.Grove, 5 J. E.Guiriec, 19 S.811Hadasch, 38 D.Harding, 39 A. K.Hayashida, 11 M.Hays, 40 E.Hewitt, 11 J. W.41Hill, 31 A. B.423Bellazzini, 9 R.Hou, 43 X.Jean, 44 P.45Jogler, 46 † T.Jóhannesson, 3 G.Johnson, 47 A. S.Johnson, 3 W. N.Kerr, 19 M.Knödlseder, 48 J.45Fermi Establishes Classical Novae as a Distinct Class of Gamma-Ray Sourcesinfo:eu-repo/classification/ddc/500A classical nova results from runaway thermonuclear explosions on the surface of a white dwarf that accretes matter from a low-mass main-sequence stellar companion. In 2012 and 2013, three novae were detected in gamma rays and stood in contrast to the first gamma-ray detected nova V407 Cygni 2010, which belongs to a rare class of symbiotic binary systems. Despite likely differences in the compositions and masses of their white dwarf progenitors, the three classical novae are similarly characterized as soft spectrum transient gamma-ray sources detected over 2-3 week durations. The gamma-ray detections point to unexpected high-energy particle acceleration processes linked to the mass ejection from thermonuclear explosions in an unanticipated class of Galactic gamma-ray sources.Science 345(6196), 554 - 558 (2014). doi:10.1126/science.1253947info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Association for the Advancement of Science162052014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207134https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01119%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1095-9203info:eu-repo/semantics/altIdentifier/doi/10.1126/science.1253947info:eu-repo/semantics/altIdentifier/issn/0036-8075info:eu-repo/semantics/altIdentifier/wos/WOS:000339651300043info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1408.0735info:eu-repo/semantics/altIdentifier/pmid/pmid:25082700info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:2071392026-02-04T11:20:08Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengH.E.S.S. CollaborationAbramowski, A.Becherini, Y.Kneiske, T.Kolitzus, D.Komin, N.Kosack, K.Krakau, S.Krayzel, F.Kruger, P. P.Laffon, H.Lamanna, G.Lefaucheur, J.Tjus, J. B.Lemiere, A.Lemoine-Goumard, M.Lenain, J.- P.Lennarz, D.Lohse, T.Lopatin, A.Lu, C.- C.Marandon, V.Marcowith, A.Marx, R.Bernlohr, K.Maurin, G.Maxted, N.Mayer, MichaelMcComb, T. J. L.Mehault, J.Meintjes, P. J.Menzler, U.Meyer, M.Moderski, R.Mohamed, M.Birsin, E.Moulin, E.Murach, T.Naumann, C. L.de Naurois, M.Niemiec, J.Nolan, S. J.Oakes, L.Ohm, S.de Ona Wilhelmi, E.Opitz, B.Bissaldi, E.Ostrowski, M.Oya, I.Panter, M.Parsons, R. D.Arribas, M. P.Pekeur, N. W.Pelletier, G.Perez, J.Petrucci, P.- O.Peyaud, B.Biteau, J.Pita, S.Poon, H.Puhlhofer, G.Punch, M.Quirrenbach, A.Raab, S.Raue, M.Reimer, A.Reimer, O.Renaud, M.Bottcher, M.Reyes, R. d. l.Rieger, F.Rob, L.Romoli, C.Rosier-Lees, S.Rowell, G.Rudak, B.Rulten, C. B.Sahakian, V.Sanchez, D. A.Boisson, C.Santangelo, A.Schlickeiser, R.Schussler, F.Schulz, A.Schwanke, U.Schwarzburg, S.Schwemmer, S.Sol, H.Spengler, G.Spies, F.Bolmont, J.Stawarz, .Steenkamp, R.Stegmann, C.Stinzing, F.Stycz, K.Sushch, I.Szostek, A.Tavernet, J.- P.Tavernier, T.Taylor, A. M.Bordas, P.Terrier, R.Tluczykont, M.Trichard, C.Valerius, K.van Eldik, C.van Soelen, B.Vasileiadis, G.Venter, C.Viana, A.Vincent, P.Aharonian, F.Brucker, J.Vink, J.Volk, H. J.Volpe, F.Vorster, M.Vuillaume, T.Wagner, S. J.Wagner, P.Ward, M.Weidinger, M.Weitzel, Q.Brun, F.White, R.Wierzcholska, A.Willmann, P.Wornlein, A.Wouters, D.Zabalza, V.Zacharias, M.Zajczyk, A.Zdziarski, A. A.Zech, A.Brun, P.Zechlin, H.- S.Bulik, T.Carrigan, S.Casanova, S.Cerruti, M.Chadwick, P. M.Chalme-Calvet, R.Chaves, R. C. G.Ait Benkhali, F.Cheesebrough, A.Chretien, M.Colafrancesco, S.Cologna, G.Conrad, J.Couturier, C.Cui, Y.Dalton, M.Daniel, M. K.Davids, I. D.Akhperjanian, A. G.Degrange, B.Deil, C.deWilt, P.Dickinson, H. J.Djannati-Atai, A.Domainko, W.Drury, L. O.Dubus, G.Dutson, K.Dyks, J.Anguner, E.Dyrda, M.Edwards, T.Egberts, K.Eger, P.Espigat, P.Farnier, C.Fegan, S.Feinstein, F.Fernandes, M. V.Fernandez, D.Anton, G.Fiasson, A.Fontaine, G.Forster, A.Fussling, M.Gajdus, M.Gallant, Y. A.Garrigoux, T.Giavitto, G.Giebels, B.Glicenstein, J. F.Balenderan, S.Grondin, M.- H.Grudzi ska, M.Haffner, S.Hahn, J.Harris, J.Heinzelmann, G.Henri, G.Hermann, G.Hervet, O.Hillert, A.Balzer, A.Hinton, J. A.Hofmann, W.Hofverberg, P.Holler, M.Horns, D.Jacholkowska, A.Jahn, C.Jamrozy, M.Janiak, M.Jankowsky, F.Barnacka, A.Jung, I.Kastendieck, M. A.Katarzy ski, K.Katz, U.Kaufmann, S.Khelifi, B.Kieffer, M.Klepser, S.Klochkov, D.Klu niak, W.Erratum: HESS J1640-465 - an Exceptionally Luminous TeV $\gamma$ -Ray Supernova Remnantinfo:eu-repo/classification/ddc/520Monthly notices of the Royal Astronomical Society 441(4), 3640 - 3642 (2014). doi:10.1093/mnras/stu826info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionOxford Univ. Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207139https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01124%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01124info:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu826info:eu-repo/semantics/altIdentifier/wos/WOS:000338764700061info:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1401.4388info:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:2071422025-07-17T09:26:49Zdnbdeliveryec_fundedresourcesdriveropen_accessopenaireVDBengYin, ZhongRajkovic, IvanKubicek, KatharinaQuevedo, WilsonPietzsch, AnnetteWernet, PhilippeFöhlisch, AlexanderTechert, SimoneProbing the Hofmeister Effect with Ultrafast Core-Hole Spectroscopyinfo:eu-repo/classification/ddc/530In the current work, X-ray emission spectra of aqueous solutions of different inorganic salts within the Hofmeister series are presented. The results reflect the direct interaction of the ions with the water molecules and therefore, reveal general properties of the salt–water interactions. Within the experimental precision a significant effect of the ions on the water structure has been observed but no ordering according to the structure maker/structure breaker concept could be mirrored in the results indicating that the Hofmeister effect—if existent—may be caused by more complex interactions.The journal of physical chemistry <Washington, DC> / B 118(31), 9398 - 9403 (2014). doi:10.1021/jp504577ainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-07-16DEhttps://bib-pubdb1.desy.de/record/207142https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01127%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1520-6106info:eu-repo/semantics/altIdentifier/pmid/pmid:25029209info:eu-repo/semantics/altIdentifier/issn/1089-5647info:eu-repo/semantics/altIdentifier/wos/WOS:000340223000030info:eu-repo/semantics/altIdentifier/doi/10.1021/jp504577ainfo:eu-repo/semantics/altIdentifier/issn/1520-5207info:eu-repo/grantAgreement/EC//290605
oai:bib-pubdb1.desy.de:2071682021-11-10T12:03:19Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuchmuller, WilfriedDudas, EmilianHeurtier, LucienWestphal, AlexanderWieck, ClemensWinkler, Martin WolfgangChallenges for Large-Field Inflation and Moduli StabilizationWe analyze the interplay between K\'ahler moduli stabilization and chaotic inflation in supergravity. While heavy moduli decouple from inflation in the supersymmetric limit, supersymmetry breaking generically introduces non-decoupling effects. These lead to inflation driven by a soft mass term, $m_\varphi^2 \sim m m_{3/2}$, where $m$ is a supersymmetric mass parameter. This scenario needs no stabilizer field, but the stability of moduli during inflation imposes a large supersymmetry breaking scale, $m_{3/2} \gg H$, and a careful choice of initial conditions. This is illustrated in three prominent examples of moduli stabilization: KKLT stabilization, K\'ahler Uplifting, and the Large Volume Scenario. Remarkably, all models have a universal effective inflaton potential which is flattened compared to quadratic inflation. Hence, they share universal predictions for the CMB observables, in particular a lower bound on the tensor-to-scalar ratio, $r \gtrsim 0.05$.Red Report 44 pp. (2015).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207168https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01152%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1501.05812info:eu-repo/grantAgreement/EC//226371
oai:bib-pubdb1.desy.de:2071972025-07-30T12:57:31Zec_fundedresourcesVDBopenaireengLastusaari, M.Brito, H. F.Carlson, S.Hölsä, J.Laamanen, T.Rodrigues, L. C. V.Welter, E.Valences of Dopants in $\mathrm{Eu^{2+}}$ Persistent Luminescence Materialsinfo:eu-repo/classification/ddc/530The existence and effect of different rare earth $(R^{2+/3+/IV})$ ions in $SrAl_{2}O_{4}:Eu^{2+},R^{3+}$ and $M_{2}MgSi_{2}O_{7}:Eu^{2+},R^{3+}$ (M: Sr, Ba) persistent luminescence materials was studied with XANES (x-ray absorption near edge structure) measurements at HASYLAB/DESY (Hamburg, Germany) and MAX-lab (Lund, Sweden). The experiments were carried out at 298 K for selected rare earth (co-)dopants $(Eu^{2+}; Ce^{3+}, Nd^{3+}, Sm^{3+}, Dy^{3+}$ and $Yb^{3+}$). The co-existence of $Eu^{2+}$ and $Eu^{3+}$ was observed in all materials. The co-dopants were always in the trivalent form.Physica scripta 89(4), 044004 (2014). doi:10.1088/0031-8949/89/04/044004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIoP Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207197https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01181%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0031-8949/89/04/044004info:eu-repo/semantics/altIdentifier/issn/1402-4896info:eu-repo/semantics/altIdentifier/wos/WOS:000333449400005info:eu-repo/semantics/altIdentifier/issn/0031-8949info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2072172025-07-17T09:25:50Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAckermann, MarkusAjello, M.Bonamente, E.Ohsugi, T.Okumura, A.Omodei, N.Orienti, M.Orlando, E.Ormes, J. F.Paneque, D.Panetta, J. H.Perkins, J. S.Pesce-Rollins, M.Bottacini, E.Petrosian, V.Piron, F.Pivato, G.Porter, T. A.Rainò, S.Rando, R.Razzano, M.Reimer, A.Reimer, O.Ritz, S.Bouvier, A.Schulz, A.Sgrò, C.Siskind, E. J.Spandre, G.Spinelli, P.Takahashi, H.Takeuchi, Y.Tanaka, Y.Thayer, J. G.Thayer, J. B.Brandt, T. J.Thompson, D. J.Tibaldo, L.Tinivella, M.Tosti, G.Troja, E.Tronconi, V.Usher, T. L.Vandenbroucke, J.Vasileiou, V.Vianello, G.Bregeon, J.Vitale, V.Werner, M.Winer, B. L.Wood, D. L.Wood, K. S.Wood, M.Yang, Z.Brigida, M.Bruel, P.Buehler, R.Buson, S.Caliandro, G. A.Albert, A.Cameron, R. A.Caraveo, P. A.Cecchi, C.Charles, E.Chekhtman, A.Chen, Q.Chiang, J.Chiaro, G.Ciprini, S.Claus, R.Allafort, A.Cohen-Tanugi, J.Conrad, J.Cutini, S.D'Ammando, F.de Angelis, A.de Palma, F.Dermer, C. D.Desiante, R.Digel, S. W.Di Venere, L.Baldini, L.do Couto e Silva, E.Drell, P. S.Drlica-Wagner, A.Favuzzi, C.Fegan, S. J.Focke, W. B.Franckowiak, A.Fukazawa, Y.Funk, S.Fusco, P.Barbiellini, G.Gargano, F.Gasparrini, D.Germani, S.Giglietto, N.Giordano, F.Giroletti, M.Glanzman, T.Godfrey, G.Grenier, I. A.Grove, J. E.Bastieri, D.Guiriec, S.Hadasch, D.Hayashida, M.Hays, E.Horan, D.Hughes, R. E.Inoue, Y.Jackson, M. S.Jogler, T.Jóhannesson, G.Bechtol, K.Johnson, W. N.Kamae, T.Kawano, T.Knödlseder, J.Kuss, M.Lande, J.Larsson, S.Latronico, L.Lemoine-Goumard, M.Longo, F.Bellazzini, R.Loparco, F.Lott, B.Lovellette, M. N.Lubrano, P.Mayer, M.Mazziotta, M. N.McEnery, J. E.Michelson, P. F.Mizuno, T.Moiseev, A. A.Bissaldi, E.Monte, C.Monzani, M. E.Moretti, E.Morselli, A.Moskalenko, I. V.Murgia, S.Murphy, R.Nemmen, R.Nuss, E.Ohno, M.High-Energy Gamma-Ray Emission from Solar Flares: Summary of FERMI Large Area Telescope Detections and Analysis of Two M-Class Flaresinfo:eu-repo/classification/ddc/520We present the detections of 18 solar flares detected in high-energy $\gamma$-rays (above 100 MeV) with the Fermi Large Area Telescope (LAT) during its first 4 yr of operation. This work suggests that particle acceleration up to very high energies in solar flares is more common than previously thought, occurring even in modest flares, and for longer durations. Interestingly, all these flares are associated with fairly fast coronal mass ejections (CMEs). We then describe the detailed temporal, spatial, and spectral characteristics of the first two long-lasting events: the 2011 March 7 flare, a moderate (M3.7) impulsive flare followed by slowly varying $\gamma$-ray emission over 13 hr, and the 2011 June 7 M2.5 flare, which was followed by $\gamma$-ray emission lasting for 2 hr. We compare the Fermi LAT data with X-ray and proton data measurements from GOES and RHESSI. We argue that the $\gamma$-rays are more likely produced through pion decay than electron bremsstrahlung, and we find that the energy spectrum of the proton distribution softens during the extended emission of the 2011 March 7 flare. This would disfavor a trapping scenario for particles accelerated during the impulsive phase of the flare and point to a continuous acceleration process at play for the duration of the flares. CME shocks are known for accelerating the solar energetic particles (SEPs) observed in situ on similar timescales, but it might be challenging to explain the production of $\gamma$-rays at the surface of the Sun while the CME is halfway to the Earth. A stochastic turbulence acceleration process occurring in the solar corona is another likely scenario. Detailed comparison of characteristics of SEPs and $\gamma$-ray-emitting particles for several flares will be helpful to distinguish between these two possibilities.The astrophysical journal 787(1), 15 (2014). doi:10.1088/0004-637X/787/1/15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionUniv.110322014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207217https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01200%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/wos/WOS:000335924200015info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/787/1/15info:eu-repo/semantics/altIdentifier/issn/1538-4357info:eu-repo/semantics/altIdentifier/issn/0004-637xinfo:eu-repo/grantAgreement/EC//259391
oai:bib-pubdb1.desy.de:2072362025-07-17T09:26:42ZdnbdeliverydriverVDBopen_accessopenaireoai:bib-pubdb1.desy.de:2072372025-07-30T12:57:31Zec_fundedresourcesVDBopenaireengWharmby, MichaelSnoyek, MalteRhauderwiek, TimoRitter, KnutStock, NorbertGroup 13 Metal Carboxylates: Using Molecular Clusters As Hybrid Building Units in a MIL-53 Type Frameworkinfo:eu-repo/classification/ddc/540Systematic investigation of the reactions of the system AlCl3·6H2O/pyridine-2,4,6-tricarboxylic acid (H3PTC)/pyridine in water yielded two new compounds, both containing the dimeric {AlPTC(μ-OH)(H2O)}22– unit. With long reaction times, the framework compound [Al(μ-OH){AlPTC(μ-OH)(H2O)}2]·2H2O (CAU-16, compound 1) is obtained, the first example of a framework compound with a metal–organic cluster linker, and bearing the MIL-53 network. Although the compound does not breathe, as other MIL-53 compounds do, it has a maximum uptake of CO2 of 1.76(2) mmol g–1 at 196 K. With shorter reaction times, the molecular compound {Al(HPTC)(μ-OH)(H2O)}2 (2) was prepared, leading to the proposal of a crystallization scheme for the Al3+-pyridine-2,4,6,-tricarboxylic acid system. To determine whether further framework compounds bearing hybrid metal cluster linkers could be prepared, systematic high-throughput investigations of pyridine-2,4,6-tricarboxylic acid in water with Ga3+ and In3+ were undertaken. These yielded two chain-type compounds, GaPTC(H2O)2 (3) and InPTC(H2O)2 (4), with different coordination chemistries. Optimized syntheses for compounds 1, 2, and 4 are reported.Crystal growth & design 14(10), 5310 - 5317 (2014). doi:10.1021/cg501189ninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionACS Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207237https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01220%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000342609300056info:eu-repo/semantics/altIdentifier/issn/1528-7483info:eu-repo/semantics/altIdentifier/issn/1528-7505info:eu-repo/semantics/altIdentifier/doi/10.1021/cg501189ninfo:eu-repo/grantAgreement/EC//228862
oai:bib-pubdb1.desy.de:2072822025-07-30T12:58:05Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengChapman, Henry N.Disruptive Photon Technologies for Chemical Dynamicsinfo:eu-repo/classification/ddc/540A perspective of new and emerging technologies for chemical dynamics is given, with an emphasis on the use of X-ray sources that generate sub-picosecond pulses. The two classes of experimental techniques used for time-resolved measurements of chemical processes and their effects are spectroscopy and imaging, where the latter includes microscopy, diffractive imaging, and crystallography. X-Ray free-electron lasers have brought new impetus to the field, allowing not only temporal and spatial resolution at atomic time and length scales, but also bringing a new way to overcome limitations due to perturbation of the sample by the X-ray probe by out-running radiation damage. Associated instrumentation and methods are being developed to take advantage of the new opportunities of these sources. Once these methods of observational science have been mastered it should be possible to use the new tools to directly control those chemical processes.Faraday discussions 171, 525 - 543 (2014). doi:10.1039/C4FD00156Ginfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2014info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2015-08-12DEhttps://bib-pubdb1.desy.de/record/207282https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01265%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1364-5498info:eu-repo/semantics/altIdentifier/doi/10.1039/C4FD00156Ginfo:eu-repo/semantics/altIdentifier/pmid/pmid:25274509info:eu-repo/semantics/altIdentifier/wos/WOS:000345529900029info:eu-repo/semantics/altIdentifier/issn/1359-6640info:eu-repo/semantics/altIdentifier/issn/0301-7249info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2072912025-07-17T12:30:18Zec_fundedresourcesVDBopenaireengMontarges-Pelletier, EmmanuelleDuriez, CarolineGhanbaja, JaafarJeanneau, LaurentFalkenberg, GeraldMichot, LaurentMicroscale Investigations of the Fate of Heavy Metals Associated to Iron-Bearing Particles in a Highly Polluted Streaminfo:eu-repo/classification/ddc/333.7As it flows through a dense steelmaking area, the Fensch River does transport iron-rich particles and colloids, displaying high contents in metallic contaminants (Zn, Cr, Pb, Cu, Ni, and As). Chemical analysis using inductively coupled plasma mass spectrometry (ICP-MS) was carried out on three compartments—waters, suspended materials, and sediments—along the river linear. The variations of metallic trace element concentrations along the river were shown to be partially related to external inputs (industrial and domestic wastewaters and urban surfaces leaching). However, some discrepancies of element partitioning were evidenced. Pb, Cu, and Mn tend to concentrate in suspended particulate and in dissolved fraction, while Cr and As follow the trend of Fe and concentrate within sediments of the most downstream station, just before the junction with Moselle waters. Zn appears strongly associated to iron-rich particles, resulting in a decrease of its concentration in waters for the last station. Along the Fensch linear, the variation of metal partitioning between water and particulate phases is accompanied with strong modifications of the nature and mineralogy of iron-rich particles, as evidenced by microanalyses using electron and X-ray beams. The combination of bulk analyses using ICP-MS and microanalyses applied to the three compartments allowed us to propose a three-step process “settling–weathering–resuspension” to explain Zn partitioning.Environmental science and pollution research 21(4), 2744 - 2760 (2014). doi:10.1007/s11356-013-2192-xinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207291https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01274%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/s11356-013-2192-xinfo:eu-repo/semantics/altIdentifier/issn/0944-1344info:eu-repo/semantics/altIdentifier/pmid/pmid:24126933info:eu-repo/semantics/altIdentifier/issn/1614-7499info:eu-repo/semantics/altIdentifier/wos/WOS:000331815100032info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2073042025-07-30T12:57:59Zec_fundedresourcesVDBopenaireengWatkins, Erik B.Gao, HaifeiDennison, Andrew J. C.Chopin, NathalieStruth, BerndArnold, ThomasFlorent, Jean-ClaudeJohannes, LudgerCarbohydrate Conformation and Lipid Condensation in Monolayers Containing Glycosphingolipid Gb3: Influence of Acyl Chain Structureinfo:eu-repo/classification/ddc/570Globotriaosylceramide (Gb3), a glycosphingolipid found in the plasma membrane of animal cells, is the endocytic receptor of the bacterial Shiga toxin. Using x-ray reflectivity (XR) and grazing incidence x-ray diffraction (GIXD), lipid monolayers containing Gb3 were investigated at the air-water interface. XR probed Gb3 carbohydrate conformation normal to the interface, whereas GIXD precisely characterized Gb3’s influence on acyl chain in-plane packing and area per molecule (APM). Two phospholipids, 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) and 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE), were used to study Gb3 packing in different lipid environments. Furthermore, the impact on monolayer structure of a naturally extracted Gb3 mixture was compared to synthetic Gb3 species with uniquely defined acyl chain structures. XR results showed that lipid environment and Gb3 acyl chain structure impact carbohydrate conformation with greater solvent accessibility observed for smaller phospholipid headgroups and long Gb3 acyl chains. In general, GIXD showed that Gb3 condensed phospholipid packing resulting in smaller APM than predicted by ideal mixing. Gb3’s capacity to condense APM was larger for DSPC monolayers and exhibited different dependencies on acyl chain structure depending on the lipid environment. The interplay between Gb3-induced changes in lipid packing and the lipid environment’s impact on carbohydrate conformation has broad implications for glycosphingolipid macromolecule recognition and ligand binding.Biophysical journal 107(5), 1146 - 1155 (2014). doi:10.1016/j.bpj.2014.07.023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRockefeller Univ. Press2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207304https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01287%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25185550info:eu-repo/semantics/altIdentifier/issn/1542-0086info:eu-repo/semantics/altIdentifier/issn/0006-3495info:eu-repo/semantics/altIdentifier/wos/WOS:000341275100015info:eu-repo/semantics/altIdentifier/doi/10.1016/j.bpj.2014.07.023info:eu-repo/grantAgreement/EC//340485
oai:bib-pubdb1.desy.de:2074132025-07-17T09:25:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRibeiro, Euripedes de AlmeidaPinotsis, NikosHolt, Mark R.Aachmann, Finn L.Žagrović, BojanBordignon, EnricaPirker, Katharina F.Svergun, DmitriGautel, MathiasDjinović-Carugo, KristinaGhisleni, AndreaSalmazo, AnitaKonarev, PetrKostan, JuliusSjöblom, BjörnSchreiner, ClaudiaPolyansky, Anton A.Gkougkoulia, Eirini A.The Structure and Regulation of Human Muscle $\alpha$-Actinininfo:eu-repo/classification/ddc/570The spectrin superfamily of proteins plays key roles in assembling the actin cytoskeleton in various cell types, crosslinks actin filaments, and acts as scaffolds for the assembly of large protein complexes involved in structural integrity and mechanosensation, as well as cell signaling. α-actinins in particular are the major actin crosslinkers in muscle Z-disks, focal adhesions, and actin stress fibers. We report a complete high-resolution structure of the 200 kDa α-actinin-2 dimer from striated muscle and explore its functional implications on the biochemical and cellular level. The structure provides insight into the phosphoinositide-based mechanism controlling its interaction with sarcomeric proteins such as titin, lays a foundation for studying the impact of pathogenic mutations at molecular resolution, and is likely to be broadly relevant for the regulation of spectrin-like proteinsCell 159(6), 1447 - 1460 (2014). doi:10.1016/j.cell.2014.10.056info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionCell Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207413https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01323%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0092-8674info:eu-repo/semantics/altIdentifier/issn/1097-4172info:eu-repo/semantics/altIdentifier/wos/WOS:000346652900021info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cell.2014.10.056info:eu-repo/semantics/altIdentifier/pmid/pmid:25433700info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2074212025-07-30T12:57:53Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSoykan, T.Schneeberger, D.Schindelin, H.Brose, N.Tria, G.Buechner, C.Bader, N.Svergun, D.Tessmer, I.Poulopoulos, A.Papadopoulos, T.Varoqueaux, F.A Conformational Switch in Collybistin Determines the Differentiation of Inhibitory Postsynapsesinfo:eu-repo/classification/ddc/570The formation of neuronal synapses and the dynamic regulation of their efficacy depend on the assembly of the postsynaptic neurotransmitter receptor apparatus. Receptor recruitment to inhibitory GABAergic and glycinergic synapses is controlled by the scaffold protein gephyrin and the adaptor protein collybistin. We derived new insights into the structure of collybistin and used these to design biochemical, cell biological, and genetic analyses of collybistin function. Our data define a collybistin‐based protein interaction network that controls the gephyrin content of inhibitory postsynapses. Within this network, collybistin can adopt open/active and closed/inactive conformations to act as a switchable adaptor that links gephyrin to plasma membrane phosphoinositides. This function of collybistin is regulated by binding of the adhesion protein neuroligin‐2, which stabilizes the open/active conformation of collybistin at the postsynaptic plasma membrane by competing with an intramolecular interaction in collybistin that favors the closed/inactive conformation. By linking trans‐synaptic neuroligin‐dependent adhesion and phosphoinositide signaling with gephyrin recruitment, the collybistin‐based regulatory switch mechanism represents an integrating regulatory node in the formation and function of inhibitory postsynapses.The EMBO journal 33(18), 2113 - 2133 (2014). doi:10.15252/embj.201488143info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEMBO Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207421https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01331%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1460-2075info:eu-repo/semantics/altIdentifier/wos/WOS:000342503000012info:eu-repo/semantics/altIdentifier/pmid/pmid:25082542info:eu-repo/semantics/altIdentifier/doi/10.15252/embj.201488143info:eu-repo/semantics/altIdentifier/issn/0261-4189info:eu-repo/grantAgreement/EC//241498info:eu-repo/grantAgreement/EC//242167info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2074332025-07-30T12:58:16Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMa, QingjunAkhter, YusufWilmanns, MatthiasEhebauer, MatthiasActive Site Conformational Changes upon Reaction Intermediate Biotinyl-5'-AMP Binding in Biotin Protein Ligase from Mycobacterium Tuberculosisinfo:eu-repo/classification/ddc/610Protein biotinylation, a rare form of post-translational modification, is found in enzymes required for lipid biosynthesis. In mycobacteria, this process is essential for the formation of their complex and distinct cell wall and has become a focal point of drug discovery approaches. The enzyme responsible for this process, biotin protein ligase, substantially varies in different species in terms of overall structural organization, regulation of function and substrate specificity. To advance the understanding of the molecular mechanism of biotinylation in Mycobacterium tuberculosis we have biochemically and structurally characterized the corresponding enzyme. We report the high-resolution crystal structures of the apo-form and reaction intermediate biotinyl-5'-AMP-bound form of M. tuberculosis biotin protein ligase. Binding of the reaction intermediate leads to clear disorder-to-order transitions. We show that a conserved lysine, Lys138, in the active site is essential for biotinylation.Protein science 23(7), 932 - 939 (2014). doi:10.1002/pro.2475info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207433https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01343%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:24723382info:eu-repo/semantics/altIdentifier/doi/10.1002/pro.2475info:eu-repo/semantics/altIdentifier/issn/0961-8368info:eu-repo/semantics/altIdentifier/wos/WOS:000337669800009info:eu-repo/semantics/altIdentifier/issn/1469-896Xinfo:eu-repo/grantAgreement/EC//241587
oai:bib-pubdb1.desy.de:2074382025-07-30T09:24:04Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNogly, PrzemyslawJames, DanielJaeger, KathrinMetz, MarkusWickstrand, CeciliaWu, WentingBåth, PetraBerntsen, PeterOberthuer, DominikPanneels, ValerieCherezov, VadimChapman, HenryWang, DingjieSchertler, GebhardNeutze, RichardSpence, JohnMoraes, IsabelBurghammer, ManfredStandfuss, JoergWeierstall, UweWhite, Thomas A.Zatsepin, NadiaShilova, AnastasyaNelson, GarrettLiu, HaiguangJohansson, LindaHeymann, MichaelLipidic Cubic Phase Serial Millisecond Crystallography using Synchrotron Radiationinfo:eu-repo/classification/ddc/530Lipidic cubic phases (LCPs) have emerged as successful matrixes for the crystallization of membrane proteins.Moreover, the viscous LCP also provides a highly effective delivery medium for serial femtosecond crystallography (SFX) at X-ray free-electron lasers (XFELs). Here, the adaptation of this technology to perform serial millisecond crystallography (SMX) at more widely available synchrotron microfocus beamlines is described. Compared with conventional microcrystallography, LCP-SMX eliminates the need for difficult handling of individual crystals and allows for data collection at room temperature. The technology is demonstrated by solving a structure of the light-driven protonpump bacteriorhodopsin (bR) at a resolution of 2.4 A ° . The room-temperature structure of bR is very similar to previous cryogenic structures but shows small yet distinct differences in the retinal ligand and proton-transfer pathway.IUCrJ 2(2), 168 - 176 (2015). doi:10.1107/S2052252514026487info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInternational Union of Crystallography (IUCr)2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207438https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01346%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/2052-2525info:eu-repo/semantics/altIdentifier/wos/WOS:000356866400007info:eu-repo/semantics/altIdentifier/doi/10.1107/S2052252514026487info:eu-repo/semantics/altIdentifier/pmid/pmid:25866654info:eu-repo/grantAgreement/EC//317079
oai:bib-pubdb1.desy.de:2074542025-07-30T12:58:10Zec_fundedresourcesVDBopenaireengSyson, KarlStevenson, Clare E. M.Rashid, Abdul M.Saalbach, GerhardTang, MinhongTuukkanen, AnneSvergun, DmitriWithers, Stephen G.Lawson, David M.Bornemann, StephenStructural Insight into How Streptomyces coelicolor Maltosyl Transferase GlgE Binds $\alpha$-Maltose 1-Phosphate and Forms a Maltosyl-Enzyme Intermediateinfo:eu-repo/classification/ddc/570GlgE (EC 2.4.99.16) is an α-maltose 1-phosphate:(1→4)-α- D -glucan 4-α- D -maltosyltransferase of theCAZy glycoside hydrolase 13_3 family. It is the definingenzyme of a bacterial α-glucan biosynthetic pathway and is agenetically validated anti-tuberculosis target. It catalyzes the α-retaining transfer of maltosyl units from α-maltose 1-phosphate to maltooligosaccharides and is predicted to use adouble-displacement mechanism. Evidence of this mechanismwas obtained using a combination of site-directed mutagenesis of Streptomyces coelicolor GlgE isoform I, substrate analogues,protein crystallography, and mass spectrometry. The X-ray structures of α-maltose 1-phosphate bound to a D394A mutein and aβ-2-deoxy-2-fluoromaltosyl-enzyme intermediate with a E423A mutein were determined. There are few examples of CAZyglycoside hydrolase family 13 members that have had their glycosyl-enzyme intermediate structures determined, and none beforenow have been obtained with a 2-deoxy-2-fluoro substrate analogue. The covalent modification of Asp394 was confirmed usingmass spectrometry. A similar modification of wild-type GlgE proteins from S. coelicolor and Mycobacterium tuberculosis was alsoobserved. Small-angle X-ray scattering of the M. tuberculosis enzyme revealed a homodimeric assembly similar to that of the S.coelicolor enzyme but with slightly differently oriented monomers. The deeper understanding of the structure−functionrelationships of S. coelicolor GlgE will aid the development of inhibitors of the M. tuberculosis enzyme.Biochemistry 53(15), 2494 - 2504 (2014). doi:10.1021/bi500183cinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Chemical Society2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207454https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01352%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0006-2960info:eu-repo/semantics/altIdentifier/doi/10.1021/bi500183cinfo:eu-repo/semantics/altIdentifier/wos/WOS:000334991100008info:eu-repo/semantics/altIdentifier/issn/1520-4995info:eu-repo/semantics/altIdentifier/pmid/pmid:24689960info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2074802025-07-30T09:24:22Zec_fundedresourcesVDBopenaireengRadisavljević, I.Trigueiro, J.Bundaleski, N.Medić, M.Romčević, N.Teodoro, O. M. N. D.Mitrić, M.Ivanović, N.XAFS and XPS Analysis of $Zn_{0.98}Fe_{0.02}Te_{0.91}Se_{0.09}$ Semiconductorinfo:eu-repo/classification/ddc/670Local structures and electronic properties of II–VI quaternary Zn 0.98 Fe 0.02 Te 0.91 Se 0.09 mixed crystal arestudied by X-ray absorption fine structure (XAFS) while the surface composition and its oxidation inair are studied by X-ray photoelectron spectroscopy (XPS). That way the surface stability and its modifi-cation with respect to the bulk are elucidated. The effects of surface oxidation on rearrangement and seg-regation of constituent atomic species at the surface are revealed and possible mechanisms of oxygenadsorption are discussed.Journal of alloys and compounds 632, 17 - 22 (2015). doi:10.1016/j.jallcom.2015.01.169info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/207480https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01368%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jallcom.2015.01.169info:eu-repo/semantics/altIdentifier/issn/0925-8388info:eu-repo/semantics/altIdentifier/wos/WOS:000350388900003info:eu-repo/semantics/altIdentifier/issn/1873-4669info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2077112025-07-30T09:24:34Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengPomoni, ElliIntegrability in $\mathcal{N}=2$ superconformal gauge theoriesinfo:eu-repo/classification/ddc/530Any N = 2 superconformal gauge theory (including N = 4 SYM) contains a set of local operators madeonly out of fields in the N = 2 vector multiplet that is closed under renormalization to all loops, namelythe SU(2, 1|2) sector. For planar N = 4 SYM the spectrum of local operators can be obtained by mappingthe problem to an integrable model (a spin chain in perturbation theory), in principle for any value of thecoupling constant. We present a diagrammatic argument that for any planar N = 2 superconformal gaugetheory the SU(2, 1|2) Hamiltonian acting on infinite spin chains is identical to all loops to that of N = 4SYM, up to a redefinition of the coupling constant. Thus, this sector is integrable and anomalous dimensionscan be, in principle, read off from the N = 4 ones up to this redefinition.Nuclear physics <Amsterdam> / B 893, 21 - 53 (2015). doi:10.1016/j.nuclphysb.2015.01.006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207711https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01431%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2015.01.006info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1310.5709info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01431info:eu-repo/semantics/altIdentifier/wos/WOS:000352045000002info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2077122025-07-30T09:24:34Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRavi, KoustubanHuang, Wenqian RonnyCarbajo, SergioNanni, Emilio A.Schimpf Barre, DamianIppen, Erich P.Kärtner, Franz. X.Theory of terahertz generation by optical rectification using tilted-pulse-frontsinfo:eu-repo/classification/ddc/530A model for terahertz (THz) generation by optical rectification using tilted-pulse-fronts is developed. It simultaneously accounts for in two spatial dimensions (2-D) (i) the spatio-temporal variations of the optical pump pulse imparted by the tilted-pulse-front setup, (ii) the nonlinear coupled interaction of THz and optical radiation, (iii) self-phase modulation and (iv) stimulated Raman scattering. The model is validated by quantitative agreement with experiments and analytic calculations. We show that the optical pump beam is significantly broadened in the transverse-momentum (kx) domain as a consequence of its spectral broadening due to THz generation. In the presence of this large frequency and transverse-momentum (or angular) spread, group velocity dispersion causes a spatio-temporal break-up of the optical pump pulse which inhibits further THz generation. The implications of these effects on energy scaling and optimization of optical-to-THz conversion efficiency are discussed. This suggests the use of optical pump pulses with elliptical beam profiles for large optical pump energies. Furthermore, it is seen that optimization of the setup is highly dependent on optical pump conditions. Trade-offs in optimizing the optical-to-THz conversion efficiency on the spatial and spectral properties of THz radiation are discussed to guide the development of such sources.Optics express 23(4), 5253 - 5276 (2015). doi:10.1364/OE.23.005253info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/207712https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01432%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1094-4087info:eu-repo/semantics/altIdentifier/wos/WOS:000350872700135info:eu-repo/semantics/altIdentifier/doi/10.1364/OE.23.005253info:eu-repo/semantics/altIdentifier/pmid/pmid:25836558info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2082982025-07-30T09:24:57Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHuang, XiaojingLauer, KennethClark, JesseXu, WeiheNazaretski, EvgenyHarder, RossRobinson, Ian K.Chu, Yong S.Fly-Scan Ptychographyinfo:eu-repo/classification/ddc/000We report an experimental ptychography measurement performed in fly-scan mode. With a visible-light laser source, we demonstrate a 5-fold reduction of data acquisition time. By including multiple mutually incoherent modes into the incident illumination, high quality images were successfully reconstructed from blurry diffraction patterns. This approach significantly increases the throughput of ptychography, especially for three-dimensional applications and the visualization of dynamic systems.Scientific reports 5, 9074 (2015). doi:10.1038/srep09074info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208298https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01661%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:25766519info:eu-repo/semantics/altIdentifier/wos/WOS:000351149500005info:eu-repo/semantics/altIdentifier/doi/10.1038/srep09074info:eu-repo/semantics/altIdentifier/issn/2045-2322info:eu-repo/grantAgreement/EC//227711
oai:bib-pubdb1.desy.de:2083252022-08-30T08:35:12Zec_fundedresourcesVDBopenairegerKüpper, JochenProseminar: MolekülphysikModerne Themen der MolekülphysikAusarbeitung eines Vortrags und Referats zu einem Thema zur Kontrolle und Abbildung von Molekülen und Moleküldynamik. Wir werden bis etwa Weihnachten die Themen allgemein besprechen und in den wissenschaftlichen Kontext setzen. Danach bereiten Sie Ihre Referate und Vorträge vor, welche dann Ende des Semesters gehalten werden.info:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionLecture at Universität Hamburg (Hamburg), 15 Oct 2014 - 28 Jan 20152014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/208325https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01677%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2084662025-07-30T09:25:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNikitin, SergeyChigarev, NikolayTournat, VincentBulou, AlainGasteau, DamienCastagnede, BernardZerr, AndreasGusev, Vitalyi E.Revealing Sub-$\mu$m and $\mu$m-Scale Textures in $H_2O$ Ice at Megabar Pressures by Time-Domain Brillouin Scatteringinfo:eu-repo/classification/ddc/000The time-domain Brillouin scattering technique, also known as picosecond ultrasonic interferometry,allows monitoring of the propagation of coherent acoustic pulses, having lengths ranging from nanometresto fractions of a micrometre, in samples with dimension of less than a micrometre to tens of micrometres. Inthis study, we applied this technique to depth-profiling of a polycrystalline aggregate of ice compressed in adiamond anvil cell to megabar pressures. The method allowed examination of the characteristic dimensionsof ice texturing in the direction normal to the diamond anvil surfaces with sub-micrometre spatialresolution via time-resolved measurements of the propagation velocity of the acoustic pulses travelling inthe compressed sample. The achieved imaging of ice in depth and in one of the lateral directions indicatesthe feasibility of three-dimensional imaging and quantitative characterisation of the acoustical, optical andacousto-optical properties of transparent polycrystalline aggregates in a diamond anvil cell with tens ofnanometres in-depth resolution and a lateral spatial resolution controlled by pump laser pulses focusing,which could approach hundreds of nanometres.Scientific reports 5, 9352 (2015). doi:10.1038/srep09352info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208466https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01732%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1038/srep09352info:eu-repo/semantics/altIdentifier/issn/2045-2322info:eu-repo/semantics/altIdentifier/pmid/pmid:25790808info:eu-repo/semantics/altIdentifier/wos/WOS:000351291000002info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2084992025-08-03T02:59:13Zec_fundedresourcesVDBopenaireengRodrigues, LucasHölsä, JormaLastusaari, MikaFelinto, Maria C. F. C.Brito, Hermi F.Defect to $\mathrm{R^{3+}}$ Energy Transfer: Colour Tuning of Persistent Luminescence in $\mathrm{CdSiO_3}$info:eu-repo/classification/ddc/540Luminescence from trivalent rare earth (R 3+ : La 3+ –Lu 3+ , excluding Pm 3+ ) ions was studied in the CdSiO 3host. The positions of the R 2+/3+ energy levels in the band structure of CdSiO 3 suggest that the dopingof CdSiO 3 with R 2+ ions is difficult if not impossible. Red, pink, blue, green and close to white persistentluminescence colours were obtained by doping with Pr 3+ , Sm 3+ , Gd 3+ , Tb 3+ and Dy 3+ , respectively. Theefficiency of the defect to R 3+ energy transfer determines if persistent luminescence arises from the 4f–4f, defect or a combination of these two emissions. In contrast to what is observed for Pr 3+ and Tb 3+ ,the defect to R 3+ energy transfer did not give efficient persistent luminescence for Sm 3+ and Dy 3+ ,probably due to high energy losses and/or back transfer from the rare earth to defects. In line with theexperimental observations, the in situ synchrotron radiation XANES spectra indicated the presence ofonly the trivalent Pr 3+ and Tb 3+ species thus excluding the direct R 3+ / R IV oxidation during thecharging process of persistent luminescence. Finally, based on the band gap energy, R 2+/3+ energy levelpositions, trap energies, and other optical and structural properties, the mechanism of persistent luminescence was developed for Pr 3+ doped CdSiO 3 . For practical applications, the CdSiO 3 :R 3+ systemoffers an excellent possibility for colour tuning of persistent luminescence by changing only the R 3+ dopant instead of altering the host as is the case with the Eu 2+ doped materials. Eventually, this will avoid the waste of both intellectual and financial resources.Journal of materials chemistry / C 2(9), 1612 - 1618 (2014). doi:10.1039/c3tc31995dinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRSC2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/208499https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01737%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1039/c3tc31995dinfo:eu-repo/semantics/altIdentifier/wos/WOS:000331917600007info:eu-repo/semantics/altIdentifier/issn/2050-7526info:eu-repo/semantics/altIdentifier/issn/2050-7534info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2085652023-10-19T19:02:42ZopenaireVDBdriverurnopen_accessdnbdeliveryec_fundedresourcesengCarbajo, SergioKärtner, FranzAdvances towards the Development of Compact Relativistic Electron and Bright X-Ray SourcesDissertationCompact brilliant attosecond electron and x-ray sources promise to bring wide-spread access to groundbreaking scientific, technological, and medical tools. In the pursuit of such visionary technology, this thesis describes in detail three key scientific and technological feasibility advances towards the development of novel electron and x-ray sources based entirely on optical lasers. The main areas covered are (i) high average- and peak-power optical laser development, (ii) efficiency scaling and limitations of terahertz radiation generation, and (iii) direct longitudinal laser acceleration of electrons in vacuum. In (i) we will point at Yb:YLF technology as a candidate for optical energy scaling at high repetition rates and sub-ps pulse durations, and will present a thorough front-end design and preliminary experimental results. In (ii) we will describe in detail theoretical and experimental aspects of the primary mechanisms that contribute to increasing and ultimately saturating the optical-toterahertzenergy conversion efficiency in lithium niobate through optical rectification, and show the highest efficiency demonstrated to date. In (iii) we will expound on the first-time demonstration of longitudinal acceleration of electrons using relativistic radially-polarized few-cycle pulses in an entirely free-space environment. Throughout the thesis and specially in the introduction, we will discuss how each independent topic relates to one anotherand ultimately integrates into the concept of compact relativistic electron and bright x-ray sources.102 pp. (2015). doi:10.3204/PUBDB-2015-01771 = Dissertation, Universität Hamburg, 2015info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208565https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01771%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:gbv:18-72723info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01771info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2085662025-07-30T09:25:15Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDolan, Matthew J.Kahlhoefer, FelixMcCabe, ChristopherSchmidt-Hoberg, KaiA Taste of Dark Matter: Flavour Constraints on Pseudoscalar Mediatorsinfo:eu-repo/classification/ddc/530Dark matter interacting via the exchange of a light pseudoscalar can induce observable signals in indirect detection experiments and experience large self-interactions while evading the strong bounds from direct dark matter searches. The pseudoscalar mediator will however induce flavour-changing interactions in the Standard Model, providing a promising alternative way to test these models. We investigate in detail the constraints arising from rare meson decays and fixed target experiments for different coupling structures between the pseudoscalar and Standard Model fermions. The resulting bounds are highly complementary to the information inferred from the dark matter relic density and the constraints from primordial nucleosynthesis. We discuss the implications of our findings for the dark matter self-interaction cross section and the prospects of probing dark matter coupled to a light pseudoscalar with direct or indirect detection experiments. In particular, we find that a pseudoscalar mediator can only explain the Galactic Centre excess if its mass is above that of the B mesons, and that it is impossible to obtain a sufficiently large direct detection cross section to account for the DAMA modulation.Journal of high energy physics 1503(3), 171 (2015). doi:10.1007/JHEP03(2015)171info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208566https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01772%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP03(2015)171info:eu-repo/semantics/altIdentifier/wos/WOS:000356835700003info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1412.5174info:eu-repo/grantAgreement/EC//277591
oai:bib-pubdb1.desy.de:2085672025-07-17T08:54:24Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengStewart, Iain W.Tackmann, Frank J.Waalewijn, Wouter J.Dissecting Soft Radiation with Factorizationinfo:eu-repo/classification/ddc/550An essential part of high-energy hadronic collisions is the soft hadronic activity that underlies the primary hard interaction. It includes soft radiation from the primary hard partons, secondary multiple parton interactions (MPI), and factorization-violating effects. The invariant mass spectrum of the leading jet in Z+jet and H+jet events is directly sensitive to these effects, and we use a QCD factorization theorem to predict its dependence on the jet radius R, jet pT, jet rapidity, and partonic process for both the perturbative and nonperturbative components of primary soft radiation. We prove that the nonperturbative contributions involve only odd powers of R, and the linear R term is universal for quark and gluon jets. The hadronization model in PYTHIA8 agrees well with these properties. The perturbative soft initial state radiation (ISR) has a contribution that depends on the jet area in the same way as the underlying event, but this degeneracy is broken by dependence on the jet pT. The size of this soft ISR contribution is proportional to the color state of the initial partons, yielding the same positive contribution for gg→Hg and gq→Zq, but a negative interference contribution for qq¯→Zg. Hence, measuring these dependencies allows one to separate hadronization, soft ISR, and MPI contributions in the data.Physical review letters 114(9), 092001 (2015). doi:10.1103/PhysRevLett.114.092001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208567https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01773%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.114.092001info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.6722info:eu-repo/semantics/altIdentifier/pmid/pmid:25793802info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/semantics/altIdentifier/wos/WOS:000350976700006info:eu-repo/semantics/altIdentifier/issn/1079-7114info:eu-repo/grantAgreement/EC//328913
oai:bib-pubdb1.desy.de:2085682025-07-30T09:25:15ZdnbdeliverydriverVDBopen_accessopenaireoai:bib-pubdb1.desy.de:2085712025-07-30T09:25:20Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCagnazzo, AlessandraSchomerus, VolkerTlapak, VaclavOn the Spectrum of Superspheresinfo:eu-repo/classification/ddc/530Sigma models on coset superspaces, such as odd dimensional superspheres, play an important role in physics and in particular the AdS/CFT correspondence. In this work we apply recent general results on the spectrum of coset space models and on supergroup WZNW models to study the conformal sigma model with target space S^{3|2}. We construct its vertex operators and provide explicit formulas for their anomalous dimensions, at least to leading order in the sigma model coupling. The results are used to revisit a non-perturbative duality between the supersphere and the OSP(4|2) Gross-Neveu model that was conjectured by Candu and Saleur. With the help of powerful all-loop results for 1/2 BPS operators in the Gross-Neveu model we are able to recover the entire zero mode spectrum of the sigma model at a certain finite value of the Gross-Neveu coupling. In addition, we argue that the sigma model constraints and equations of motion are implemented correctly in the dual Gross-Neveu description. On the other hand, high(er) gradient operators of the sigma model are not all accounted for. It is possible that this discrepancy is related to an instability from high gradient operators that has previously been observed in the context of Anderson localization.Journal of high energy physics 2015(3), 13 (2015). doi:10.1007/JHEP03(2015)013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208571https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01777%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP03(2015)013info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01777info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000351359800004info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1408.6838info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2085732025-07-30T09:25:21Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCagnazzo, AlessandraSchomerus, VolkerTlapák, VáclavHigh-Gradient Operators in the $\mathfrak{psl}\left(2|2\right)$ Gross–Neveu Modelinfo:eu-repo/classification/ddc/530It has been observed more than 25 years ago that sigma model perturbation theory suffers from strongly RG-relevant high-gradient operators. The phenomenon was first seen in 1-loop calculations for the O(N) vector model and it is known to persist at least to two loops. More recently, Ryu et al. suggested that a certain deformation of the psl(N|N) WZNW-model at level k = 1, or equivalently the psl(N|N) Gross-Neveu model, could be free of RG-relevant high-gradient operators and they tested their suggestion to leading order in perturbation theory. In this note we establish the absence of strongly RG-relevant high-gradient operators in the psl(2|2) Gross-Neveu model to all loops. In addition, we determine the spectrum for a large subsector of the model at infinite coupling and observe that all scaling weights become half-integer. Evidence for a conjectured relation with the CP^1|2 sigma model is not found.Nuclear physics <Amsterdam> / B 892, 181 - 189 (2015). doi:10.1016/j.nuclphysb.2015.01.010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208573https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01779%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2015.01.010info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01779info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.4560info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/semantics/altIdentifier/wos/WOS:000350092500009info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2085752025-07-30T09:25:15Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengSjöstrand, TorbjörnAsk, StefanChristiansen, Jesper R.Corke, RichardDesai, NishitaIlten, PhilipMrenna, StephenPrestel, StefanRasmussen, Christine O.Skands, Peter Z.An Introduction to PYTHIA 8.2info:eu-repo/classification/ddc/004The PYTHIA program is a standard tool for the generation of events in high-energy collisions, comprising a coherent set of physics models for the evolution from a few-body hard process to a complex multiparticle final state. It contains a library of hard processes, models for initial- and final-state parton showers, matching and merging methods between hard processes and parton showers, multiparton interactions, beam remnants, string fragmentation and particle decays. It also has a set of utilities and several interfaces to external programs. PYTHIA 8.2 is the second main release after the complete rewrite from Fortran to C++, and now has reached such a maturity that it offers a complete replacement for most applications, notably for LHC physics studies. The many new features should allow an improved description of data.Computer physics communications 0, 159-177 (2015). doi:10.1016/j.cpc.2015.01.024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth Holland Publ. Co.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208575https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01781%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0010-4655info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.3012info:eu-repo/semantics/altIdentifier/wos/WOS:000353083800017info:eu-repo/semantics/altIdentifier/issn/1879-2944info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cpc.2015.01.024info:eu-repo/semantics/altIdentifier/issn/1386-9485info:eu-repo/grantAgreement/EC//315877
oai:bib-pubdb1.desy.de:2085782025-07-17T08:54:50Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBroy, BenedictPedro, Francisco G.Westphal, AlexanderDisentangling the f (R)-Dualityinfo:eu-repo/classification/ddc/530Motivated by UV realisations of Starobinsky-like inflation models, we study generic exponential plateau-like potentials to understand whether an exact f(R)-formulation may still be obtained when the asymptotic shift-symmetry of the potential is broken for larger field values. Potentials which break the shift symmetry with rising exponentials at large field values only allow for corresponding f(R)-descriptions with a leading order term Rn with 1<n<2, regardless of whether the duality is exact or approximate. The R2-term survives as part of a series expansion of the function f(R) and thus cannot maintain a plateau for all field values. We further find a lean and instructive way to obtain a function f(R) describing m2ϕ2-inflation which breaks the shift symmetry with a monomial, and corresponds to effectively logarithmic corrections to an R+R2 model. These examples emphasise that higher order terms in f(R)-theory may not be neglected if they are present at all. Additionally, we relate the function f(R) corresponding to chaotic inflation to a more general Jordan frame set-up. In addition, we consider f(R)-duals of two given UV examples, both from supergravity and string theory. Finally, we outline the CMB phenomenology of these models which show effects of power suppression at low-ℓ.Journal of cosmology and astroparticle physics 2015(03), 029 (2015). doi:10.1088/1475-7516/2015/03/029info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208578https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01784%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.6010info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2015/03/029info:eu-repo/semantics/altIdentifier/wos/WOS:000355633800029info:eu-repo/semantics/altIdentifier/issn/1475-7516info:eu-repo/grantAgreement/EC//320421
oai:bib-pubdb1.desy.de:2086182021-11-10T12:07:55Zec_fundedresourcesdriverVDBopen_accessopenaireengIsachenkov, MikhailMitev, VladimirPomoni, ElliThree-Point Functions of the Toda CFTdoi:10.3204/PUBDB-2015-01815info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionGATIS Integrability Workshop, Paris, DESY, France, 2015-03-11 - 2015-03-132015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208618https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01815%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-01815info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2088422025-07-30T12:58:42Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHarutyunyan, V.Aleksanyan, E.Kirm, M.Yeritsyan, G.Nikoghosyan, S.Sahakyan, A.Grigoryan, N.Makhov, V.Luminescence Spectroscopy of Electron and Neutron Irradiated $α-Al_2O_3$ Single CrystalsElectronic properties of electron and neutron irradiated α-Al2O3 single crystals were investigated using photoluminescence spectroscopy.IEEE 163-164 (2014). doi:10.1109/OMEE.2014.6912390info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion[Proceedings] - IEEE, 2014. - ISBN 978-1-4799-5960-0[Proceedings] - IEEE, 2014. - ISBN 978-1-4799-5960-0<br/>2014 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE), Lviv, Ukraine, 2014-05-26 - 2014-05-30IEEE2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208842https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01913%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:00info:eu-repo/semantics/altIdentifier/doi/10.1109/OMEE.2014.6912390info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2088772025-07-30T12:58:37Zec_fundedresourcesVDBopenaireengKudryavtseva, I.Klopov, M.Lushchik, A.Lushchik, ChMaaroos, A.Pishtshev, A.Electronic excitations and self-trapping of electrons and holes in $CaSO_4$info:eu-repo/classification/ddc/530A first-principles study of the electronic properties of a CaSO4 anhydrite structural phase has been performed. A theoretical estimation for the fundamental band gap (p → s transitions) is Eg = 9.6 eV and a proper threshold for p → d transitions is Epd = 10.8 eV. These values agree with the data obtained for a set of CaSO4 doped with Gd3+, Dy3+, Tm3+ and Tb3+ ions using the methods of low-temperature highly sensitive luminescence and thermoactivation spectroscopy. The results are consistent with theoretical predictions of a possible low-temperature self-trapping of oxygen p-holes. The hopping diffusion of hole polarons starts above ~40 K and is accompanied by a ~50–60 K peak of thermally stimulated luminescence of RE3+ ions caused due to the recombination of hole polarons with the electrons localized at RE3+. There is no direct evidence of the self-trapping of heavy d-electrons, however, one can argue that their motion rather differs from that of conduction s-electrons.Physica scripta 89(4), 044013 (2014). doi:10.1088/0031-8949/89/4/044013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIoP Publ.2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/208877https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01929%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0031-8949info:eu-repo/semantics/altIdentifier/issn/1402-4896info:eu-repo/semantics/altIdentifier/doi/10.1088/0031-8949/89/4/044013info:eu-repo/semantics/altIdentifier/wos/WOS:000333449400014info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2089322025-07-17T09:26:55Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDowling, M.Moch, S.Differential distributions for top-quark hadro-production with a running massinfo:eu-repo/classification/ddc/530We take a look at how the differential distributions for top-quark production are affected by changing to the running mass scheme. Specifically we consider the transverse momentum, rapidity and pair-invariant mass distributions at next-to-leading order for the top-quark mass in the MS scheme. It is found that, similar to the total cross section, the perturbative expansion converges faster and the scale dependence improves using the mass in the MS scheme as opposed to the on-shell scheme. We also update the analysis for the total cross section using the now available full next-to-next-to-leading order contribution.The European physical journal / C 74(11), 3167 (2014). doi:10.1140/epjc/s10052-014-3167-xinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/208932https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01941%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1305.6422info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-014-3167-xinfo:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/semantics/altIdentifier/wos/WOS:000347178300002info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2089892025-07-17T09:27:06Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFECHER, GERHARD H.EBKE, DANIELFELSER, CLAUDIAOUARDI, SIHAMAGRESTINI, STEFANOKUO, CHANG-YANGHOLLMANN, NILSHU, ZHIWEIGLOSKOVSKII, ANDREIYAKHOU, FLORABROOKES, NICHOLAS B.State of Co and Mn in half-Metallic Ferromagnet $\mathrm{Co_ 2MnSi}$ explored by Magnetic Circular Dichroism in hard X-ray Photoelectron Emission and Soft X-Ray Absorption Spectroscopieinfo:eu-repo/classification/ddc/530The half-metallic Heusler compound Co2MnSi is a very attractive material for spintronic devices because it exhibits very high tunnelling magnetoresistance ratios. This work reports on a spectroscopic investigation of thin Co2MnSi films as they are used as electrodes in magnetic tunnel junctions. The investigated ̄lms exhibit a remanent in-plane magnetization with a magnetic moment of about 5 uB when saturated, as expected. The low coercive field of only 4 mT indicates soft magnetic behavior. Magnetic dichroism in emission and absorption was measured at the Co and Mn 2p core levels. The photoelectron spectra were excited by circularly polarized hard X-rays with an energy of 6 keV and taken from the remanently magnetized film. The soft X-ray absorption spectra were taken in an induction ̄eld of 4 T. Both methods yielded large dichroism effects. An analysis reveals the localized character of the electrons and magnetic moments attributed to the Mn atoms, whereas the electrons related to the Co atoms contribute an itinerant part to the total magnetic moment.SPIN 04(04), 1440017 (2014). doi:10.1142/S2010324714400177info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWorld Scientific Publishing2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/208989https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01977%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1142/S2010324714400177info:eu-repo/semantics/altIdentifier/issn/2010-3255info:eu-repo/semantics/altIdentifier/wos/WOS:000209835500002info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1501.03966info:eu-repo/semantics/altIdentifier/issn/2010-3247info:eu-repo/grantAgreement/EC//291472
oai:bib-pubdb1.desy.de:2091452021-11-10T12:08:56Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengIsachenkov, MikhailMitev, VladimirPomoni, ElliToda 3-Point Functions From Topological Strings IIstring: topologicalfield theory: Todapartition functionIn arXiv:1409.6313 we proposed a formula for the 3-point structure constants of Toda field theory, derived using topological strings and the AGT-W correspondence from the partition functions of the non-Lagrangian $T_N$ theories on $S^4$. In this article, we show how the semi-degeneration of one of the three primary fields on the Toda side corresponds to a particular Higgsing of the $T_N$ theories and derive the well-known formula by Fateev and Litvinov.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/209145https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-01996%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1412.3395info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2091802025-07-30T09:25:42Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMitev, VladimirPomoni, ElliTaki, MasatoYagi, FutoshiFiber-Base Duality and Global Symmetry Enhancementinfo:eu-repo/classification/ddc/530symmetry: globalsymmetry: enhancementdualitypartition functionflavorreparametrizationfixed point: ultravioletCoulombmoduliSU(2)We show that the 5D Nekrasov partition functions enjoy the enhanced global symmetry of the UV fixed point. The fiber-base duality is responsible for the global symmetry enhancement. For SU(2) with N$_{f}$ ≤ 7 flavors the fiber-base symmetry together with the manifest flavor SO(2N$_{f}$ ) symmetry generate the $ {\mathrm{E}}_{N_{f+1}} $ global symmetry, while in the higher rank case the manifest global symmetry of the two dual theories related by the fiber-base duality map generate the symmetry enhancement. The symmetry enhancement at the level of the partition function is manifest once we chose an appropriate reparametrization for the Coulomb moduli.Journal of high energy physics 1504(4), 52 (2015). doi:10.1007/JHEP04(2015)052info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/209180https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02011%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000356853500002info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP04(2015)052info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02011info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.2450info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2091822021-11-10T12:09:11Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRetolaza, AnderUranga, Angel M.Westphal, AlexanderBifid Throats for Axion Monodromy Inflationduality: holographygauge field theory: dualitymembrane model: fractionalinflaton: potentialthroatback reactionmonodromyaxionorbifoldWe construct a simple explicit local geometry providing a `bifid throat' for 5-brane axion monodromy. A bifid throat is a throat that splits into two daughter throats in the IR, containing a homologous 2-cycle family reaching down into each daughter throat. Our example consists of a deformed \mathbb{Z}_3 \times \mathbb{Z}_2 orbifold of the conifold, which provides us with an explicit holographic dual of the bifid throat including D3-branes and fractional 5-branes at the toric singularities of our setup. Having the holographic description in terms of the dual gauge theory allows us to address the effect of 5-brane-antibrane pair backreaction including the warping effects. This leads to the size of the backreaction being small and controllable after imposing proper normalization of the inflaton potential and hence the warping scales.Red Report 33 p. (2015).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/209182https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02013%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1504.02103info:eu-repo/grantAgreement/EC//320421
oai:bib-pubdb1.desy.de:2091892021-11-10T12:09:12Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMoortgat-Pick, GudridBaer, H.Uwer, P.Wackeroth, D.Zerwas, P. M.Arbey, A.Asano, M.Bechtle, P.Bharucha, A.Brau, J.Brummer, F.Choi, S. Y.Battaglia, M.Denner, A.Desch, K.Dittmaier, S.Ellwanger, U.Englert, C.Freitas, A.Ginzburg, I.Godfrey, S.Greiner, N.Grojean, C.Belanger, G.Grunewald, M.Heisig, J.Hocker, A.Kanemura, S.Kawagoe, K.Kogler, R.Krawczyk, M.Kronfeld, A. S.Kroseberg, J.Liebler, S.Fujii, K.List, J.Mahmoudi, F.Mambrini, Y.Matsumoto, S.Mnich, J.Monig, K.Muhlleitner, M. M.Poschl, R.Porod, W.Porto, S.Kalinowski, J.Rolbiecki, K.Schmitt, M.Serpico, P.Stanitzki, M.Stal, O.Stefaniak, T.Stockinger, D.Weiglein, G.Wilson, G. W.Zeune, L.Heinemeyer, S.Moortgat, F.Xella, S.Bagger, J.Ellis, J.Komamiya, S.Kronfeld, A. S.Peskin, M.Schlatter, D.Wagner, A.Yamamoto, H.Kiyo, Y.Olive, K.Simon, F.Physics at the $e^+ e^-$ Linear Colliderelectron: energy: lowenergy: lowlinear colliderelectroweak interactionlittle Higgs modelcosmological modelHiggs particleCERN LHC Collsupersymmetrygauge bosonnew physicsA comprehensive review of physics at an e+e- Linear Collider in the energy range of sqrt{s}=92 GeV--3 TeV is presented in view of recent and expected LHC results, experiments from low energy as well as astroparticle physics.The report focuses in particular on Higgs boson, Top quark and electroweak precision physics, but also discusses several models of beyond the Standard Model physics such as Supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analyzed as well.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/209189https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02020%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1504.01726info:eu-repo/semantics/altIdentifier/pmid/pmid:26300691info:eu-repo/grantAgreement/EC//226371info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2094172021-11-10T12:09:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBañuls, M. C.Cichy, K.Cirac, J. I.Jansen, K.Saito, H.Thermal evolution of the Schwinger model with Matrix Product OperatorsWe demonstrate the suitability of tensor network techniques for describing the thermal evolution of lattice gauge theories. As a benchmark case, we have studied the temperature dependence of the chiral condensate in the Schwinger model, using matrix product operators to approximate the thermal equilibrium states for finite system sizes with non-zero lattice spacings. We show how these techniques allow for reliable extrapolations in bond dimension, step width, system size and lattice spacing, and for a systematic estimation and control of all error sources involved in the calculation. The reached values of the lattice spacing are small enough to capture the most challenging region of high temperatures and the final results are consistent with the analytical prediction by Sachs and Wipf over a broad temperature range.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/209417https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02073%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1505.00279info:eu-repo/grantAgreement/EC//600645
oai:bib-pubdb1.desy.de:2200212025-07-17T08:54:07ZdnbdeliverydriverVDBopen_accessopenaireoai:bib-pubdb1.desy.de:2200262022-08-30T08:35:15Zec_fundedresourcesdriverVDBopen_accessopenaireengKüpper, JochenImaging Molecular Structure and Dynamics utilizing X-ray Free-Electron-Laser SourcesImaging controlled molecules with ultrashort x- ray pulses from free-electron lasers enables the recording of “molecular movies”, i.e., snapshots of molecules at work, with spatial (picometer) and temporal (femtosecond) atomic resolution.info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionIEEE Photonics Conference, High Power/Intensity Sources (HPIS), IPC, Reston, VA, USA, IEEE Photonics Society, USA, 2015-10-04 - 2015-10-082015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220026https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02092%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2200632021-11-10T12:09:39Zec_fundedresourcesVDBopenaireengCavaleiro, AndreNi/Ti Reactive Multilayers for JoiningDissertationReactive multilayers are interesting for a variety of applications, including near-net shape form- ing of parts/systems of intermetallic compounds, dissimilar/similar joining, ignition origin and as highly localised heat sources. In the last decade, the production of intermetallic compounds, from multilayer thin films, became a widespread process. Due to its moderate enthalpy of reaction, the Ni-Ti system has not yet received special attention in the context of low temperature joining, in spite of its reaction product, NiTi, having promising mechanical properties, like superleasticity and shape memory effect. The aim of this PhD thesis was to study the reaction between Ni/Ti multilayers, by thermal treatment/pressure or activated using femtosecond laser pulses and the possibility to use them as joining mechanism.Ni/Ti reactive nanomultilayers with different modulation period (Λ =5 nm, 12 nm, 25 nm and 75 nm) and a total thickness of around 2.5 μm were deposited, using a magnetron sputtering equipment (double cathode). These multilayer thin films exhibit a columnar growth, independently of the substrates, and a roughness value that is directly proportional to the modulation period. Structural evolution was followed during thermal treatment in situ using synchrotron x-ray diffraction. The multilayers evolve from Ni/Ti to B2-NiTi, in one step, without the formation of intermediate phases and independently of selected material and modulation period. The reaction temperature of the phase evolution varies with the period and the heating rate. When the multilayer thin films are deposited onto Ti6Al4V substrates, the nickel from the NiTi (final phase), at temperatures higher than ≈450 ◦C, diffuses to the substrate.Sound joints between NiTi and Ti6Al4V were achieved utilising Ni/Ti multilayers with 12 and 25nm periods at temperature as low as 600◦C, during 30min, under a pressure of 10MPa. However, the loss of nickel for the material poor in Ni was always observed. This element promotes the occurrence, in the selected alloy (Ti6Al4V), of the formation of titanium in the beta phase. In situ synchrotron x-ray diffraction in transmission mode, during the joining process, revealed that the formation of the NiTi2 is reduced in the joints produced at lower temperatures. Nevertheless, the bonds presented good interface quality, without pores or other significant defects.Ignition experiments were conducted on several multilayers using femtosecond laser pulses with high energy density. However, the substrates’ thermal properties play a very important role: while metallic substrates quench the reaction confining it to the volume interacted by laser, for ceramic substrates like zirconia, the reaction is more significant in dimension. In truth, for conventional film thickness (2-5 μm) it was demonstrated that even when multilayers are nanocrystaline, the reaction continues to be difficult to start. Thicker films (60 μm) are incompatible with the adhesion of the bonding material. Using femtosecond laser pulses it was possible to produce a nanopattern with lower periodicity than the laser wavelength (LIPSS), while maintaining the multilayer structure.218 pp. (2015). = University of Coimbra, Diss., 2015info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/220063https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02094%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2200692025-07-30T09:26:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengChang, Yuan-PinHorke, DanielTrippel, SebastianKüpper, JochenSpatially-controlled complex molecules and their applicationsinfo:eu-repo/classification/ddc/540The understanding of molecular structure and function is at the very heart of the chemical and molecular sciences. Experiments that allow for the creation of structurally pure samples and the investigation of their molecular dynamics and chemical function have developed tremendeously over the last few decades, although "there’s plenty of room at the bottom" for better control as well as further applications.Here, we describe the use of inhomogeneous electric fields for the manipulation of neutral molecules in the gas-phase, i. e., for the separation of complex molecules according to size, structural isomer, and quantum state. Current applications of these controlled samples are summarized and interesting future applications discussed.International reviews in physical chemistry 34(4), 557-590 (2015). doi:10.1080/0144235X.2015.1077838info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionTaylor & Francis2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220069https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02096%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0144-235Xinfo:eu-repo/semantics/altIdentifier/doi/10.1080/0144235X.2015.1077838info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1505.05632info:eu-repo/semantics/altIdentifier/wos/WOS:000362864000001info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2201282022-08-30T08:35:16Zec_fundedresourcesdriverVDBopen_accessopenaireengKüpper, JochenQuantum Molecular Tunneling in External Electric and Laser Fieldsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionXVIIth International Workshop on Quantum Atomic and Molecular Tunneling in Solids and other Phases, QAMTS, Beatenberg, Switzerland, 2015-05-31 - 2015-06-032015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220128https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02121%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2201642021-09-21T19:21:38Zoai:bib-pubdb1.desy.de:2202042025-07-30T09:26:18Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCalendron, Anne-LaureÇankaya, HüseyinCirmi, GiovanniKärtner, Franz X.White-Light Generation with Sub-ps Pulsesinfo:eu-repo/classification/ddc/530We generate white light supercontinuum from slightly sub-picosecond pulses at 1.03 µm and 515 nm. We compare the spectra and stability for various crystals, focusing conditions and pulse durations, and determine the best parameters for sub-picosecond driver pulse duration. Comparing the experimental observations with the theory of white-light generation from Brodeur and Chin, it appears that in this particular range of pump pulse duration, two mechanisms interact and prevent a catastrophic collapse of the beam: multi-photon excitation (typical for ~100-fs-long pulses) and avalanche ionization (typical for >1-ps pulses). The two processes both manifest themselves in different experimental observations.Optics express 23(11), 13866 - 13879 (2015). doi:10.1364/OE.23.013866info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220204https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02139%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1364/OE.23.013866info:eu-repo/semantics/altIdentifier/issn/1094-4087info:eu-repo/semantics/altIdentifier/pmid/pmid:26072757info:eu-repo/semantics/altIdentifier/wos/WOS:000356902400048info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2202262021-11-10T12:09:48Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBernardoni, FabioBlossier, BenoîtBulava, JohnDella Morte, MicheleFritzsch, PatrickGarron, NicolasGérardin, AntoineHeitger, Jochenvon Hippel, GeorgSimma, HubertB-meson spectroscopy in HQET at order 1/mbottom: masspi: masshigher-order: 1Heavy Quark Effective Theorymass differencelatticehyperfine structuregauge field theorystrong couplingnonperturbativeexcited stateground stateWe present a study of the B spectrum performed in the framework of Heavy Quark Effective Theory expanded to next-to-leading order in 1/m and non-perturbative in the strong coupling. Our analyses have been performed on Nf=2 lattice gauge field ensembles corresponding to three different lattice spacings and a wide range of pion masses. We obtain the Bs-meson mass and hyperfine splittings of the B- and Bs-mesons that are in good agreement with the experimental values and examine the mass difference m_{Bs}-m_B as a further cross-check of our previous estimate of the b-quark mass. We also report on the mass splitting between the first excited state and the ground state in the B and Bs systems.35 p. (2015).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220226https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02146%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1505.03360info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:2202332025-07-17T08:53:45Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRoedig, P.Vartiainen, I.David, C.Wagner, A.Meents, A.Duman, R.Panneerselvam, S.Stübe, N.Lorbeer, O.Warmer, M.Sutton, G.Stuart, D. I.Weckert, E.A micro-patterned silicon chip as sample holder for macromolecular crystallography experiments with minimal background scatteringinfo:eu-repo/classification/ddc/000At low emittance synchrotron sources it has become possible to perform structure determinations from the measurement of multiple microcrystals which were previously considered too small for diffraction experiments. Conventional mounting techniques do not fulfill the requirements of these new experiments. They significantly contribute to background scattering and it is difficult to locate the crystals, making them incompatible with automated serial crystallography. We have developed a micro-fabricated sample holder from single crystalline silicon with micropores, which carries up to thousands of crystals and significantly reduces the background scattering level. For loading, the suspended microcrystals are pipetted onto the chip and excess mother liquor is subsequently soaked off through the micropores. Crystals larger than the pore size are retained and arrange themselves according to the micropore pattern. Using our chip we were able to collect 1.5 Å high resolution diffraction data from protein microcrystals with sizes of 4 micrometers and smaller.Scientific reports 5, 10451 (2015). doi:10.1038/srep10451info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220233https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02153%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/2045-2322info:eu-repo/semantics/altIdentifier/wos/WOS:000355587900001info:eu-repo/semantics/altIdentifier/pmid/pmid:26022615info:eu-repo/semantics/altIdentifier/doi/10.1038/srep10451info:eu-repo/grantAgreement/EC//290605
oai:bib-pubdb1.desy.de:2202902025-07-30T09:27:40Zec_fundedresourcesVDBopenaireengStavrou, ElissaiosZaug, Joseph M.Bastea, SorinCrowhurst, Jonathan C.Goncharov, Alexander F.Radousky, Harry B.Armstrong, Michael R.Roberts, Sarah K.Plaue, Jonathan W.Equations of state of anhydrous $AlF_{3}$ and $AlI_{3}$: Modeling of extreme condition halide chemistryinfo:eu-repo/classification/ddc/540Pressure dependent angle-dispersive x-ray powder diffraction measurements of alpha-phase aluminum trifluoride (α-AlF3) and separately, aluminum triiodide (AlI3) were conducted using a diamond-anvil cell. Results at 295 K extend to 50 GPa. The equations of state of AlF3 and AlI3 were determined through refinements of collected x-ray diffraction patterns. The respective bulk moduli and corresponding pressure derivatives are reported for multiple orders of the Birch-Murnaghan (B-M), finite-strain (F-f), and higher pressure finite-strain (G-g) EOS analysis models. Aluminum trifluoride exhibits an apparent isostructural phase transition at approximately 12 GPa. Aluminum triiodide also undergoes a second-order atomic rearrangement: applied stress transformed a monoclinically distorted face centered cubic (fcc) structure into a standard fcc structural arrangement of iodine atoms. Results from semi-empirical thermochemical computations of energetic materials formulated with fluorine containing reactants were obtained with the aim of predicting the yield of halogenated products.The journal of chemical physics 142(21), 214506 (2015). doi:10.1063/1.4921896info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Institute of Physics2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/220290https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02207%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000355931800091info:eu-repo/semantics/altIdentifier/pmid/pmid:26049507info:eu-repo/semantics/altIdentifier/issn/1089-7690info:eu-repo/semantics/altIdentifier/issn/0021-9606info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4921896info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2202992022-08-30T08:35:16Zec_fundedresourcesVDBopenaireengKüpper, JochenLaarmann, TimVendrell Romagosa, OriolThe Basis of Modern Molecular Physicsinfo:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionLecture at Universität Hamburg (Hamburg, Germany), 13 Oct 2015 - 29 Jan 20162015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/220299https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02210%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2203872016-10-05T19:11:51Zoai:bib-pubdb1.desy.de:2204072025-07-17T08:55:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKierspel, ThomasWiese, JossChapman, Henry N.Christensen, LaugeFry, AlanHunter, MarkKoglin, Jason E.Liang, MengningMariani, ValerioMorgan, AndrewNatan, AdiPetrovic, VladimirMullins, TerenceRolles, DanielRudenko, ArtemSchnorr, KirstenStapelfeldt, HenrikStern, StephanThøgersen, JanYoon, Chun HongWang, FenglinTrippel, SebastianKüpper, JochenRobinson, JosephAquila, AndyBarty, AntonBean, RichardBoll, RebeccaBoutet, SébastienBucksbaum, PhilipStrongly aligned gas-phase molecules at Free-Electron Lasersinfo:eu-repo/classification/ddc/530We demonstrate a novel experimental implementation to strongly align molecules at full repetition rates of free-electron lasers. We utilized the available in-house laser system at the coherent x-ray imaging beamline at the Linac Coherent Light Source. Chirped laser pulses, i. e., the direct output from the regenerative amplifier of the Ti:Sa chirped pulse amplification laser system, were used to strongly align 2,5-diiodothiophene molecules in a molecular beam. The alignment laser pulses had pulse energies of a few mJ and a pulse duration of 94 ps. A degree of alignment of $\left<\cos^2\!\theta_{2D}\right>=0.85$ was measured, limited by the intrinsic temperature of the molecular beam rather than by the available laser system. With the general availability of synchronized chirped-pulse-amplified near-infrared laser systems at short-wavelength laser facilities, our approach allows for the universal preparation of molecules tightly fixed in space for experiments with x-ray pulses.Journal of physics / B 48(20), 204002 (2015). doi:10.1088/0953-4075/48/20/204002 special issue: "Frontiers of Free-Electrons Laser Science Series II"info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220407https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02229%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0022-3700info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1506.03650info:eu-repo/semantics/altIdentifier/wos/WOS:000362421800004info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-4075/48/20/204002info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2204192025-07-30T09:27:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFrantzeskakis, E.de Jong, N.Radovic, M.Plumb, N. C.Xu, N.Shi, M.Lupulescu, C.Arion, T.Ovsyannikov, R.Varykhalov, A.Eberhardt, W.de Visser, A.Zwartsenberg, B.van Heumen, E.Golden, M. S.Bay, T. V.Huang, Y. K.Ramankutty, S. V.Tytarenko, A.Wu, D.Pan, Y.Hollanders, S.Dirac states with knobs on: Interplay of external parameters and the surface electronic properties of three-dimensional topological insulatorsinfo:eu-repo/classification/ddc/530Topological insulators are a novel materials platform with high applications potential in fields ranging from spintronics to quantum computation. In the ongoing scientific effort to demonstrate controlled manipulation of their electronic structure by external means - i.e the provision of knobs with which to tune properties - stoichiometric variation and surface decoration are two effective approaches that have been followed. In angle resolved photoelectron spectroscopy (ARPES) experiments, both approaches are seen to lead to electronic band structure changes. Most importantly, such approaches result in variations of the energy position of bulk and surface-related features and the creation of two-dimensional electron gases. The data presented here demonstrate that a third manipulation handle is accessible by utilizing the amount of super-band-gap light a topologicalinsulator surface has been exposed to under typical ARPES experimental conditions. Our results show that this new, third, knob acts on an equal footing with stoichiometry and surface decoration as a modifier of the electronic band structure, and that it is in continuous and direct competition with the latter. The data clearly point towards surface photovoltage and photo-induced desorption as the physical phenomena behind modificationsof the electronic band structure under exposure to high-flux photons. We show that the interplay of these phenomena can minimize and even eliminate the adsorbate-related surface band bending on typical binary, ternary and quaternary Bi-based topological insulators. Including the influence of the sample temperature, these data set up a detailed framework for the external control of the electronic band structure in topological insulatorcompounds in an ARPES setting. Four external knobs are available: bulk stoichiometry, surface decoration, temperature and photon exposure. These knobs can be used in conjunction to fine-tune the band energies near the surface and consequently influence the topological properties of the relevant electronic states.Physical review / B 91(20), 205134 (2015). doi:10.1103/PhysRevB.91.205134info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220419https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02237%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.91.205134info:eu-repo/semantics/altIdentifier/wos/WOS:000355091600010info:eu-repo/semantics/altIdentifier/issn/0556-2805info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2204282025-07-30T09:27:09Zec_fundedresourcesVDBopenaireengEvertsson, J.Bertram, F.Weissenrieder, J.Goethelid, MatsPan, J.Mikkelsen, A.Nilsson, J.-O.Lundgren, E.Zhang, F.Rullik, L.Merte, L. R.Shipilin, MikhailSoldemo, M.Ahmadi, S.Vinogradov, N.Carlà, F.The thickness of native oxides on aluminum alloys and single crystalsinfo:eu-repo/classification/ddc/670We present results from measurements of the native oxide film thickness on four different industrial aluminum alloys and three different aluminum single crystals. The thicknesses were determined using X-ray reflectivity, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy. In addition, atomic force microscopy was used for micro-structural studies of the oxide surfaces. The reflectivity measurements were performed in ultra-high vacuum, vacuum, ambient, nitrogen and liquid water conditions. The results obtained using X-ray reflectivity and X-ray photoelectron spectroscopy demonstrate good agreement. However, the oxide thicknesses determined from the electrochemical impedance spectroscopy show a larger discrepancy from the above two methods. In the present contribution the reasons for this discrepancy are discussed. We also address the effect of the substrate type and the presence of water on the resultant oxide thickness.Applied surface science 349, 826 - 832 (2015). doi:10.1016/j.apsusc.2015.05.043info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/220428https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02246%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-5584info:eu-repo/semantics/altIdentifier/wos/WOS:000357129100109info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2015.05.043info:eu-repo/semantics/altIdentifier/issn/0169-4332info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2204402022-08-30T08:35:17Zec_fundedresourcesVDBopenaireengKüpper, JochenSchnell, MelanieSeminar zur Molekülphysik / Molecular Physics SeminarCFEL Molecular Physics seminar series. This is a general topical seminar series on developments in modern molecular physics organized by the CFEL-CMI group Controlled Molecule Imaging and the CFEL-MPSD group Structure and Dynamics of Cold and Controlled Molecules. Unless otherwise noted, the seminar talks start at 10:00h in the CFEL seminar room EG.I.info:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionLecture at Universität Hamburg (Hamburg), 1 Apr 2015 - 30 Sep 20152015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/220440https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02250%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2205172025-07-17T08:55:54Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFruck, C.Gaug, M.Ebr, J.Garczarczyk, M.Lorentz, E.Pareschi, G.Pech, M.Puerto-Giménez, I.Teshima, M.Ernenwein, J.-P.Mandát, D.Schweizer, T.Häfner, D.Bulik, T.Cieslar, M.Costantini, H.Dominik, M.Instrumentation for comparing night sky quality and atmospheric conditions of CTA site candidatesinfo:eu-repo/classification/ddc/610Many atmospheric and climatic criteria have to be taken into account for the selection of a suitable site for the next generation of imaging air-shower Cherenkov telescopes, the ``Cherenkov Telescope Array'' CTA. Such data are not available with sufficient precision, thus a comparison of the proposed sites and final decision based on a comprehensive characterization is impossible. Identical cross-calibrated instruments have been developed which allow for precise comparison between sites, the cross-validation of existing data, and the ground-validation of satellite data. The site characterization work package of the CTA consortium opted to construct and deploy 9 copies of an autonomous multi-purpose weather sensor, incorporating an infrared cloud sensor, a newly developed sensor for measuring the light of the night sky, and an All-Sky-Camera, the whole referred to as Autonomous Tool for Measuring Observatory Site COnditions PrEcisely (ATMOSCOPE). We present here the hardware that was combined into the ATMOSCOPE and characterize its performance.Journal of Instrumentation 10(04), P04012 (2015). doi:10.1088/1748-0221/10/04/P04012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst. of Physics2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220517https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02282%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1501.02156info:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/10/04/P04012info:eu-repo/semantics/altIdentifier/wos/WOS:000357961700057info:eu-repo/grantAgreement/EC//262053
oai:bib-pubdb1.desy.de:2206002025-07-17T08:55:03Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKirian, R. A.Awel, S.Chavas, LeonardDomaracky, M.Heymann, M.Horke, DanielKnoska, J.Metz, M.Morgan, A.Oberthuer, D.Roth, N.Sato, T.Eckerskorn, N.Xavier, P. L.Yefanov, O.Rode, A. V.Küpper, J.Chapman, H. N.Fleckenstein, H.Wiedorn, M.Adriano, L.Bajt, S.Barthelmess, M.Bean, R.Beyerlein, KennethSimple convergent-nozzle aerosol injector for single-particle diffractive imaging with X-ray free-electron lasersinfo:eu-repo/classification/ddc/530A major challenge in high-resolution x-ray free-electron laser-based coherent diffractive imaging is the development of aerosol injectors that can efficiently deliver particles to the peak intensity of the focused X-ray beam. Here, we consider the use of a simple convergent-orifice nozzle for producing tightly focused beams of particles. Through optical imaging we show that 0.5 μm particles can be focused to a full-width at half maximum diameter of 4.2 μm, and we demonstrate the use of such a nozzle for injecting viruses into a micro-focused soft-X-ray FEL beam.Structural dynamics 2(4), 041717 (2015). doi:10.1063/1.4922648info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAIP Publishing LLC2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220600https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02309%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:26798816info:eu-repo/semantics/altIdentifier/issn/2329-7778info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02309info:eu-repo/semantics/altIdentifier/wos/WOS:000360649200019info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4922648info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2206032021-11-10T12:11:16Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMoch, S.Vermaseren, J. A. M.Vogt, A.On $\gamma_5$ in higher-order QCD calculations and the NNLO evolution of the polarized valence distributionregularization: dimensionalcoupling: axial-vectorhigher-order: 2quark: valencequantum chromodynamicsdeep inelastic scatteringcommutation relationsstructure functionsplitting functioncharged currentnucleonWe discuss the prescription for the Dirac matrix gamma_5 in dimensional regularization used in most second- and third-order QCD calculations of collider cross sections. We provide an alternative implementation of this approach that avoids the use of an explicit form of gamma_5 and of its (anti-) commutation relations in the most important case of no more than one gamma_5 in each fermion trace. This treatment is checked by computing the third-order corrections to the structure functions F_2 and g_1 in charged-current deep-inelastic scattering with axial-vector couplings to the W-bosons. We derive the so far unknown third-order helicity-difference splitting function Delta P_ns^(2)s that contributes to the next-to-next-to-leading order (NNLO) evolution of the polarized valence quark distribution of the nucleon. This function is negligible at momentum fractions x >~ 0.3 but relevant at x << 1.11 p. (2015).info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220603https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02312%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1506.04517info:eu-repo/grantAgreement/EC//320651
oai:bib-pubdb1.desy.de:2206042025-07-30T09:29:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, JoachimKormilitzin, AndreyLipatov, Lev N.Analytic structure of the $n=7$ scattering amplitude in $\mathcal{N}=4$ theory in multi-Regge kinematics: Conformal Regge cut contributioninfo:eu-repo/classification/ddc/530supersymmetry: 4kinematics: multi-Reggescattering amplitudeRegge polesfield theory: conformalinfraredweak couplingstrong couplingAdS/CFT correspondenceIn this second part of our investigation [1] of the analytic structure of the $2\to 5$ scattering amplitude in the planar limit of $\mathcal{N}=4$ super Yang-Mills theory in multi-Regge kinematics we compute, in all kinematic regions, the Regge-cut contributions at leading order. The results are infrared finite and conformally invariant.Physical review / D 91(4), 045005 (2015). doi:10.1103/PhysRevD.91.045005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220604https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02313%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02313info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.2294info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.91.045005info:eu-repo/semantics/altIdentifier/wos/WOS:000349858800011info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2206062021-11-10T12:11:17Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBalitsky, IanKazakov, VladimirSobko, EvgenyThree-point correlator of twist-2 operators in BFKL limitcorrelation functionBFKL equationquantum chromodynamicsgauge field theoryWe compute the correlation function of three twist-2 operators in N = 4 SYM in the leading BFKL approximation at any N_c. In this limit, the result is applicable to other gauge theories, including QCD.5 pp. (2015). doi:10.3204/PUBDB-2015-02315info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220606https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02315%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1506.02038info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02315info:eu-repo/grantAgreement/EC//304806
oai:bib-pubdb1.desy.de:2206772025-07-17T08:55:16Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBraun, J.Jourdan, M.Kläui, M.Ebert, H.Minár, J.Kronenberg, A.Chadov, S.Balke, B.Kolbe, M.Gloskovskii, A.Elmers, H. J.Schönhense, G.Felser, C.Monitoring surface resonances on Co2MnSi (100) by spin-resolved photoelectron spectroscopyinfo:eu-repo/classification/ddc/530The magnitude of the spin polarization at the Fermi level of ferromagnetic materials at room temperature is a key property for spintronics. Investigating the Heusler compound Co2MnSi, a value of 93% for the spin polarization has been observed at room temperature, where the high spin polarization is related to a stable surface resonance in the majority band extending deep into the bulk. In particular, we identified in our spectroscopical analysis that this surface resonance is embedded in the bulk continuum with a strong coupling to the majority bulk states. The resonance behaves very bulklike, as it extends over the first six atomic layers of the corresponding (001) surface. Our study includes experimental investigations, where the bulk electronic structure as well as surface-related features have been investigated using spin-resolved photoelectron spectroscopy (SR-UPS) and for a larger probing depth spin-integrated high energy x-ray photoemission spectroscopy (HAXPES). The results are interpreted in comparison with first-principles band structure and photoemission calculations which consider all relativistic, surface, and high-energy effects properly.Physical review / B 91(19), 195128 (2015). doi:10.1103/PhysRevB.91.195128info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220677https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02337%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000354972600004info:eu-repo/semantics/altIdentifier/issn/0556-2805info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.91.195128info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/grantAgreement/EC//208162
oai:bib-pubdb1.desy.de:2207762022-08-30T08:35:21Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHorke, DanielTrippel, SebastianKüpper, JochenSingle quantum states and defined wave packetsHamburg : DESY 28–29 (2014). doi:10.3204/PUBDB-2015-02388info:eu-repo/semantics/bookPartinfo:eu-repo/semantics/publishedVersionDESY Photon Science ReportDESY Photon Science ReportDESY2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220776https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02388%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02388info:eu-repo/semantics/altIdentifier/isbn/9783935702935info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2208962025-07-30T09:29:26Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMitev, VladimirPomoni, ElliToda 3-point functions from topological stringsinfo:eu-repo/classification/ddc/530We consider the long-standing problem of obtaining the 3-point functions of Toda CFT. Our main tools are topological strings and the AGT-W relation between gauge theories and 2D CFTs. In arXiv:1310.3841 we computed the partition function of 5D TN theories on S4×S1 and suggested that they should be interpreted as the three-point structure constants of q-deformed Toda. In this paper, we provide the exact AGT-W dictionary for this relation and rewrite the 5D TN partition function in a form that makes taking the 4D limit possible. Thus, we obtain a prescription for the computation of the partition function of the 4D TN theories on S4, or equivalently the undeformed 3-point Toda structure constants. Our formula, has the correct symmetry properties, the zeros that it should and, for N=2, gives the known answer for Liouville CFT.Journal of high energy physics 1506(6), 49 (2015). doi:10.1007/JHEP06(2015)049info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220896https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02435%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000355921700008info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02435info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP06(2015)049info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.6313info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2208992025-07-17T08:55:11Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFuchs, ElinaThewes, SiljaWeiglein, GeorgInterference effects in BSM processes with a generalised narrow-width approximationinfo:eu-repo/classification/ddc/530A generalisation of the narrow-width approximation (NWA) is formulated which allows for a consistent treatment of interference effects between nearly mass-degenerate particles in the factorisation of a more complicated process into production and decay parts. It is demonstrated that interference effects of this kind arising in BSM models can be very large, leading to drastic modifications of predictions based on the standard NWA. The application of the generalised NWA is demonstrated both at tree level and at one-loop order for an example process where the neutral Higgs bosons h and H of the MSSM are produced in the decay of a heavy neutralino and subsequently decay into a fermion pair. The generalised NWA, based on on-shell matrix elements or their approximations leading to simple weight factors, is shown to produce UV- and IR-finite results which are numerically close to the result of the full process at tree level and at one-loop order, where an agreement of better than 1% is found for the considered process. The most accurate prediction for this process based on the generalised NWA, taking into account also corrections that are formally of higher orders, is briefly discussed.The European physical journal / C 75(6), 254 (2015). doi:10.1140/epjc/s10052-015-3472-zinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220899https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02438%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.4652info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-015-3472-zinfo:eu-repo/semantics/altIdentifier/wos/WOS:000355937400005info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02438info:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2209512022-08-30T08:35:22Zec_fundedresourcesdriverVDBopen_accessopenaireengKüpper, JochenDynamics and reactivities of cold and controlled moleculesdoi:10.3204/PUBDB-2015-02444info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersion3MET PTC<sup>2</sup> – das physikalisch-theoretisch-chemische Colloquium, Kaiserslautern, TU Kaiserslautern, Germany, 2015-06-30 - 2015-07-012015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220951https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02444%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02444info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2209782025-07-17T08:53:49Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMuecke, OliverFang, ShaoboCerullo, GiulioKartner, Franz X.Cirmi, GiovanniRossi, Giulio MariaChia, Shih-HsuanYe, HongYang, YudongMainz, RolandManzoni, CristianFarinello, PaoloToward Waveform Nonlinear Optics Using Multimillijoule Sub-Cycle Waveform Synthesizersinfo:eu-repo/classification/ddc/530Waveform nonlinear optics aims to study and control the nonlinear interactions of matter with extremely short optical waveforms custom-tailored within a single cycle of light. Different technological routes to generate such multimillijoule sub-optical-cycle waveforms are currently pursued, opening up unprecedented opportunities in attoscience and strong-field physics. Here, we discuss the experimental schemes, introduce the technological challenges, and present our experimental results on high-energy sub-cycle optical waveform synthesis based on (1) parametric amplification and (2) induced-phase modulation in a two-color-driven gas-filled hollow-core fiber compressor. More specifically, for (1), we demonstrate a carrier-envelope-phase (CEP)-stable, multimillijoule three-channel parametric waveform synthesizer generating a > 2-octave-wide spectrum (0.52–2.4 {boldsymbol \mu} m). After two amplification stages, the combined 125- {boldsymbol \mu} J output supports 1.9-fs FWHM waveforms; energy scaling to > 2 mJ is achieved after three amplification stages. FROG pulse characterization of all three second-stage outputs demonstrates the feasibility to recompress all three channels simultaneously close to the Fourier limit and shows the flexibility of our intricate dispersion management scheme for different experimental situations. For (2), we generate CEP-stable 1.7-mJ waveforms covering 365–930 nm (measured at 1% of the peak intensity) obtained from induced-phase modulation in a two-color-driven gas-filled hollow-core fiber. Using custom-designed double-chirped mirrors and a UV spatial light modulator will permit compression close to the 0.9-fs FWHM transform limit. These novel sources will become versatile tool- for controlling strong-field interactions in matter and for attosecond pump–probe spectroscopy using VIS/IR and XUV/soft-X-ray pulses.IEEE journal of selected topics in quantum electronics 21(5), 1 - 12 (2015). doi:10.1109/JSTQE.2015.2426653info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIEEE2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/220978https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02470%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02470info:eu-repo/semantics/altIdentifier/doi/10.1109/JSTQE.2015.2426653info:eu-repo/semantics/altIdentifier/issn/1077-260Xinfo:eu-repo/semantics/altIdentifier/issn/1558-4542info:eu-repo/semantics/altIdentifier/wos/WOS:000356863000001info:eu-repo/grantAgreement/EC//609920info:eu-repo/grantAgreement/EC//284464info:eu-repo/grantAgreement/EC//291198
oai:bib-pubdb1.desy.de:2209932025-07-30T09:29:55Zec_fundedresourcesVDBopenaireengVergucht, EvaDe Samber, BjörnIzmer, AndreiVekemans, BartAppel, KarenTolmachev, SergeiVincze, LaszloVanhaecke, FrankStudy of the distribution of actinides in human tissues using synchrotron radiation micro X-ray fluorescence spectrometryinfo:eu-repo/classification/ddc/540This study aims at evaluating the capabilities ofsynchrotron radiation micro X-ray fluorescence spectrometry(SR micro-XRF) for qualitative and semi-quantitative elemen-tal mapping of the distribution of actinides in human tissuesoriginating from individuals with documented occupationalexposure. The investigated lymph node tissues were providedby the United States Transuranium and Uranium Registries(USTUR) and were analyzed following appropriate samplepre-treatment. Semi-quantitative results were obtained viacalibration by external standards and demonstrated that theuranium concentration level in the detected actinide hot spotsreaches more than 100 μg/g. For the plutonium hot spots,concentration levels up to 31 μg/g were found. As illustratedby this case study on these unique samples, SR micro-XRFhas a high potential for this type of elemental bio-imagingowing to its high sensitivity, high spatial resolution, and non-destructive character.Fresenius' journal of analytical chemistry 407(6), 1559 - 1566 (2015). doi:10.1007/s00216-014-8421-4info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer80402015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/220993https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02471%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0937-0633info:eu-repo/semantics/altIdentifier/wos/WOS:000349337100004info:eu-repo/semantics/altIdentifier/issn/1618-2650info:eu-repo/semantics/altIdentifier/issn/1618-2642info:eu-repo/semantics/altIdentifier/pmid/pmid:25542585info:eu-repo/semantics/altIdentifier/doi/10.1007/s00216-014-8421-4info:eu-repo/semantics/altIdentifier/issn/0372-7920info:eu-repo/semantics/altIdentifier/issn/1432-1130info:eu-repo/semantics/altIdentifier/issn/0016-1152info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2214992022-08-30T08:35:22Zec_fundedresourcesVDBopenaireengKüpper, JochenSchnell, MelanieSeminar zur Molekülphysik / Molecular Physics SeminarCFEL Molecular Physics seminar series. This is a general topical seminar series on developments in modern molecular physics organized by the CFEL-CMI group Controlled Molecule Imaging and the CFEL-MPSD group Structure and Dynamics of Cold and Controlled Molecules. Unless otherwise noted, the seminar talks start at 10:00h in the CFEL seminar room EG.I.info:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionLecture at Universität Hamburg (Hamburg, Germany), 12 Oct 2015 - 29 Jan 20162015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/221499https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02686%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2215052021-11-10T12:12:49Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBen-Dayan, IdoRichter, RobertRuehle, FabianWestphal, AlexanderVacuum energy sequestering and conformal symmetryIn a series of recent papers Kaloper and Padilla proposed a mechanism to sequester standard model vacuum contributions to the cosmological constant. We study the consequences of embedding their proposal into a fully local quantum theory. In the original work, the bare cosmological constant $\Lambda$ and a scaling parameter $\lambda$ are introduced as global fields. We find that in the local case the resulting Lagrangian is that of a spontaneously broken conformal field theory where $\lambda$ plays the role of the dilaton. A vanishing or a small cosmological constant is thus a consequence of the underlying conformal field theory structure.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/221505https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02692%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1507.04158info:eu-repo/grantAgreement/EC//328170
oai:bib-pubdb1.desy.de:2216712021-11-10T12:13:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengde Blas, JorgeChala, MikaelSantiago, JoseRenormalization Group Constraints on New Top Interactions from Electroweak Precision DataAnomalous interactions involving the top quark contribute to some of the most difficult observables to directly access experimentally. They can give however a sizeable correction to very precisely measured observables at the loop level. Using a model-independent effective Lagrangian approach, we present the leading indirect constraints on dimension-six effective operators involving the top quark from electroweak precision data. They represent the most stringent constraints on these interactions, some of which may be directly testable in future colliders.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/221671https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02759%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1507.00757info:eu-repo/grantAgreement/EC//279972info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2217232022-08-30T08:35:23Zec_fundedresourcesVDBopenaireengKüpper, JochenUltrafast chemistry — electrons in motion?info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionCompact attosecond X-ray sources and their applications, CoAXSA, Hamburg, Center for Free-Electron Laser Science, Germany, 2015-07-19 - 2015-07-212015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/221723https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02802%22Researchersinfo:eu-repo/grantAgreement/EC//641789
oai:bib-pubdb1.desy.de:2217572025-07-30T09:30:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMüller, Nele Lotte MarieTrippel, SebastianDlugolecki, KarolKüpper, JochenElectron gun for diffraction experiments off controlled moleculesinfo:eu-repo/classification/ddc/530A dc electron gun, generating picosecond pulses with up to $8\times10^6$ electrons per pulse, was developed. Its applicability for future time-resolved-diffraction experiments on state- and conformer-selected laser-aligned or oriented gaseous samples was characterized. The focusing electrodes were arranged in a velocity-map imaging spectrometer configuration. This allowed to directly measure the spatial and velocity distributions of the electron pulses emitted from the cathode. In combination with electron trajectory simulations, this permitted the characterization of the electron beam in terms of coherence length and pulse duration. Electron diffraction data of a thin aluminum foil illustrated the diffraction capabilities of the electron-gun setup.Journal of physics / B 48(24), 244001 (2015). doi:10.1088/0953-4075/48/24/244001 special issue: "Imaging the dynamic structure of matter: ultrabright x-ray and electron sources and their applications to biology, chemistry and condensed matter physics"info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIOP Publ.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/221757https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02831%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-02831info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-4075/48/24/244001info:eu-repo/semantics/altIdentifier/wos/WOS:000368622900002info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1507.02530info:eu-repo/semantics/altIdentifier/issn/0022-3700info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2218562022-08-30T08:35:30ZdriverVDBopen_accessopenaireoai:bib-pubdb1.desy.de:2218612022-08-30T08:35:30Zec_fundedresourcesVDBopenairegerKüpper, JochenDie Beziehung von Struktur und Funktion auf molekularer Ebeneinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion258. Kolloquium am Berliner Tor, Hamburg, HAW Hamburg, Germany, 2014-05-14 - 2014-05-142014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/221861https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02927%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2219222025-07-17T08:55:38Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAnzai, ChihayaHasselhuhn, AlexanderHöschele, MaikHoff, JensKilgore, WilliamSteinhauser, MatthiasUeda, TakahiroExact $\mathrm{N^{3}LO}$ results for qq′ $\to$ H + Xinfo:eu-repo/classification/ddc/530standard modelquark quark: scatteringtotal cross sectionHiggs particle: inclusive productionHiggs particle: masselectroweak interaction: correctionquantum chromodynamics: correctioncorrection: higher-orderhigher-order: 3master integralWe compute the contribution to the total cross section for the inclusive production of a Standard Model Higgs boson induced by two quarks with different flavour in the initial state. Our calculation is exact in the Higgs boson mass and the partonic center-of-mass energy. We describe the reduction to master integrals, the construction of a canonical basis, and the solution of the corresponding differential equations. Our analytic result contains both Harmonic Polylogarithms and iterated integrals with additional letters in the alphabet.Journal of high energy physics 1507(7), 140 (2015). doi:10.1007/JHEP07(2015)140info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/221922https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02968%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2015)140info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000363512900001info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1506.02674info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//320651
oai:bib-pubdb1.desy.de:2219492021-11-10T12:14:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengStaub, FlorianAthron, PeterEllwanger, UlrichGrober, RamonaMuhlleitner, MargareteSlavich, PietroVoigt, AlexanderHiggs mass predictions of public NMSSM spectrum generatorsHiggs particle: masssparticle: massup: masscoupling: Yukawaminimal supersymmetric standard modelrenormalizationThe publicly available spectrum generators for the NMSSM often lead to different predictions for the mass of the standard model-like Higgs boson even if using the same renormalization scheme and two-loop accuracy. Depending on the parameter point, the differences can exceed 5 GeV, and even reach 8 GeV for moderate superparticle masses of up to 2 TeV. It is shown here that these differences can be traced back to the calculation of the running standard model parameters entering all calculations, to the approximations used in the two-loop corrections included in the different codes, and to different choices for the renormalization conditions and scales. In particular, the importance of the calculation of the top Yukawa coupling is pointed out.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/221949https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-02981%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1507.05093info:eu-repo/grantAgreement/EC//289442info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//321133
oai:bib-pubdb1.desy.de:2220372025-08-03T02:59:57Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengZapata, Luis E.Lin, HuaCalendron, Anne-LaureCankaya, HuseyinHemmer, MichaelReichert, FabianHuang, W. RonnyGranados, EduardoHong, Kyung-HanKärtner, Franz X.Cryogenic Yb:YAG composite-thin-disk for high energy and average power amplifiersinfo:eu-repo/classification/ddc/530A cryogenic composite-thin-disk amplifier with amplified spontaneous emission (ASE) rejection is implemented that overcomes traditional laser system problems in high-energy pulsed laser drivers of high average power. A small signal gain of 8 dB was compared to a 1.5 dB gain for an uncapped thin-disk without ASE mitigation under identical pumping conditions. A strict image relayed 12-pass architecture using an off-axis vacuum telescope and polarization switching extracted 100 mJ at 250 Hz in high beam quality stretched 700 ps pulses of 0.6-nm bandwidth.Optics letters 40(11), 2610 (2015). doi:10.1364/OL.40.002610info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/222037https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03010%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1364/OL.40.002610info:eu-repo/semantics/altIdentifier/wos/WOS:000355630200044info:eu-repo/semantics/altIdentifier/issn/0146-9592info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03010info:eu-repo/semantics/altIdentifier/issn/1539-4794info:eu-repo/semantics/altIdentifier/pmid/pmid:26030570info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2220702022-08-30T08:35:31Zec_fundedresourcesVDBopenaireengKüpper, JochenControl of cold molecular beamsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion2nd User Workshop, Szeged, ELI-ALPS, Hungary, 2014-09-11 - 2014-09-112014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/222070https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03037%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2220712022-08-30T08:35:31Zec_fundedresourcesVDBopenaireengKüpper, JochenGas-phase-controlled molecules (Delivery of controlled molecules and particles)info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionLCLS/SSRL Users’ Meeting, Menlo Park, CA, USA, 2014-10-10 - 2014-10-102014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/222071https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03038%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2220722022-08-30T08:35:31Zec_fundedresourcesVDBopenaireengKüpper, JochenControlled molecule imaginginfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionAMO Physics Seminar, Amsterdam, Vrije Universiteit Amsterdam, The Netherlands, 2014-10-02 - 2014-10-022014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/222072https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03039%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2220732022-08-30T08:35:31Zec_fundedresourcesVDBopenaireengKüpper, JochenMolecular Physics at CFEL & DESYinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionMolecular Electron Dynamics investigated by Intense Fields and Attosecond Pulses, MEDEA, Berlin, Max Born Institute, Germany, 2015-01-20 - 2015-01-202015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/222073https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03040%22Researchersinfo:eu-repo/grantAgreement/EC//641789
oai:bib-pubdb1.desy.de:2221072021-11-10T12:15:20Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengMoult, IanStewart, Iain W.Tackmann, Frank J.Waalewijn, Wouter J.Employing Helicity Amplitudes for ResummationMany state-of-the-art QCD calculations for multileg processes use helicity amplitudes as their fundamental ingredients. We construct a simple and easy-to-use helicity operator basis in soft-collinear effective theory (SCET), for which the hard Wilson coefficients from matching QCD onto SCET are directly given in terms of color-ordered helicity amplitudes. Using this basis allows one to seamlessly combine fixed-order helicity amplitudes at any order they are known with a resummation of higher-order logarithmic corrections. In particular, the virtual loop amplitudes can be employed in factorization theorems to make predictions for exclusive jet cross sections without the use of numerical subtraction schemes to handle real-virtual infrared cancellations. We also discuss matching onto SCET in renormalization schemes with helicities in $4$- and $d$-dimensions. To demonstrate that our helicity operator basis is easy to use, we provide an explicit construction of the operator basis, as well as results for the hard matching coefficients, for $pp\to H + 0,1,2$ jets, $pp\to W/Z/\gamma + 0,1,2$ jets, and $pp\to 2,3$ jets. These operator bases are completely crossing symmetric, so the results can easily be applied to processes with $e^+e^-$ and $e^-p$ collisions.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/222107https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03070%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1508.02397info:eu-repo/grantAgreement/EC//328913
oai:bib-pubdb1.desy.de:2223032021-11-10T12:15:34Zec_fundedresourcesdriverVDBopen_accessopenaireengGreiner, NicolasHiggs + multi-jets at NLOdoi:10.3204/PUBDB-2015-03158info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAnnual Higgstools workshop, Freiburg, Germany, 2015-04-15 - 2015-04-172015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/222303https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03158%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03158info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2224182021-11-10T12:15:41Zec_fundedresourcesVDBopenaireengBarriobero Vila, PerePhase transformation kinetics during continuous heating of $\alpha$+$\beta$ and metastable β titanium alloysThe progress of environmental as well as performance targets that must be guaranteed by the transportation sector is highly conditioned to the availability of materials that can offer structural weight savings and improve engine performance. Titanium alloys are key materials in this regard owing to their superior specific strength with respect to other structural alloys and excellent corrosion resistance up to ~ 500 °C. However, these alloys are still associated with high production costs, and therefore, advances in manufacturing optimization are necessary to further extent their implementation. Since the mechanical properties of titanium alloys are consequence of microstructural-based alloy design controlled by the phase transformation kinetics during heat treating, a correct understanding of these processes is required.This dissertation focuses in the continuous and univocal study of the phase transformation kinetics during linear heating of α+β and metastable β titanium alloys from room temperature to the β field. An initial bi-modal microstructure is used to analyse the evolution of stable phases, namely α and β for the first group of alloys. On the other hand, decomposition of the β-quenched condition leading to formation of metastable products such as αʺ, ω and βʹ+β is studied for the second group of alloys. The investigations are carried out combining laboratory characterization methods with advanced synchrotron-based techniques including in situ high energy X-ray diffraction and micro X-ray fluorescence. Variations in the phase transformation sequences are presented as a function of heating rate. Furthermore, the continuous evolution of the crystal structure of phases is analysed in terms of the physical mechanisms involved during phase transformation.74 pp. (2015). = Vienna University of Technology, Diss., 2015info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/222418https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03226%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2239842025-07-30T09:32:20Zec_fundedresourcesVDBopenaireengTimoshenko, JanisAnspoks, AndrisKalinkoKuzmin, AlexeiLocal structure of nanosized tungstates revealed by evolutionary algorithminfo:eu-repo/classification/ddc/530Nanostructured tungstates, such as CoWO$_{4}$ and CuWO$_{4}$, are very promising catalytic materials, particularly for photocatalytic oxidation of water. The high catalytic activity of tungstate nanoparticles partially is a result of their extremely small sizes, and, consequently, high surface-to-volume ratio. Therefore their properties depend strongly on the atomic structure, which differ significantly from that of the bulk material. X-ray absorption spectroscopy is a powerful technique to address the challenging problem of the local structure determination in nanomaterials. In order to fully exploit the structural information contained in X-ray absorption spectra, in this study we employ a novel evolutionary algorithm (EA) for the interpretation of the Co and Cu K-edges as well as the W L$_{3}$-edge extended X-ray absorption fine structure (EXAFS) of nanosized CoWO$_{4}$ and CuWO$_{4}$. The combined EA-EXAFS approach and simultaneous analysis of the W L$_{3}$ and Co(Cu) K-edge EXAFS spectra allowed us for the first time to obtain a 3D structure model of the tungstate nanoparticles and to explore in details the effect of size, temperature and transition metal type.Physica status solidi / A 212(2), 265 - 273 (2015). doi:10.1002/pssa.201431561info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/223984https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03405%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1862-6319info:eu-repo/semantics/altIdentifier/issn/1521-396Xinfo:eu-repo/semantics/altIdentifier/issn/1862-6300info:eu-repo/semantics/altIdentifier/issn/0031-8965info:eu-repo/semantics/altIdentifier/wos/WOS:000349699400007info:eu-repo/semantics/altIdentifier/doi/10.1002/pssa.201431561info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2240432025-07-30T09:32:22Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengEckerskorn, NikoBowman, RichardKirian, RichardAwel, SalahWiedorn, MaxKüpper, JochenPadgett, Miles J.Chapman, Henry N.Rode, Andrei V.Toward steering a jet of particles into an x-ray beam with optically induced forcesinfo:eu-repo/classification/ddc/620Optical trapping of light-absorbing particles in a gaseous environment is governed by a laser-induced photophoreticforce, which can be orders of magnitude stronger than the force of radiation pressure induced by the same lightintensity. In spite of many experimental studies, the exact theoretical background underlying the photophoreticforce and the prediction of its influence on the particle motion is still in its infancy. Here, we report the results of aquantitative analysis of the photophoretic force and the stiffness of trapping achieved by levitating graphite andcarbon-coated glass shells of calibrated sizes in an upright diverging hollow-core vortex beam, which we refer to asan ‘optical funnel’. The measurements of forces were conducted in air at various gas pressures in the range from 5mbar to 2 bar. The results of these measurements lay the foundation for developing a touch-free optical system forprecisely positioning sub-micrometer bioparticles at the focal spot of an x-ray free electron laser, which wouldsignificantly enhance the efficiency of studying nanoscale morphology of proteins and biomolecules in femtosecondcoherent diffractive imaging experiments.Proceedings of SPIE 9548, 95480H (2015). doi:10.1117/12.2191442info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionOptical Trapping and Optical Micromanipulation XII, San Diego, California, 2015-08-09 - 2015-08-12SPIE2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/224043https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03409%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1117/12.2191442info:eu-repo/semantics/altIdentifier/wos/WOS:000366497300009info:eu-repo/semantics/altIdentifier/issn/0277-786Xinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03409info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2240452021-11-10T12:16:12Zec_fundedresourcesdriverVDBopen_accessopenaireengBargheer, TillIntegrable Deformations for N=4 Super Yang-Mills and ABJM AmplitudesIntegrands for scattering amplitudes admit deformations that preserve the integrable symmetries. I will explain these deformations in terms of Grassmannian integrals and on-shell diagrams, and discuss possible applications.doi:10.3204/PUBDB-2015-03411info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionGauge Theory, Integrability, and Novel Symmetries of Quantum Field Theory, Stony Brook, Simons Center for Geometry and Physics, USA, 2014-09-02 - 2014-12-192014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/224045https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03411%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03411info:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:2240462021-11-10T12:16:12Zec_fundedresourcesdriverVDBopen_accessopenaireengBargheer, TillIntegrable Deformations for N=4 SYM and ABJM AmplitudesIntegrands for scattering amplitudes admit deformations that preserve the integrable symmetries. I will explain these deformations in terms of Grassmannian integrals and on-shell diagrams, and discuss possible applications.doi:10.3204/PUBDB-2015-03412info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionGraßmannian Geometry of Scattering Amplitudes, Pasadena, Caltech, USA, 2014-12-08 - 2014-12-122014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/224046https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03412%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03412info:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:2240472021-11-10T12:16:12Zec_fundedresourcesdriverVDBopen_accessopenaireengBargheer, TillMinahan, Joseph A.Pereira, RaulThree-Point Functions of Short OperatorsWe compute the three-point structure constants for short primary operators of N=4 super Yang-Mills theory to leading order in the inverse coupling by mapping the problem to a flat-space string theory calculation. We check the validity of our procedure by comparing to known results for three chiral primaries. We then compute the three-point functions for any combination of chiral and non-chiral primaries, with the non-chiral primaries all dual to string states at the first massive level. Along the way we find many cancellations that leave us with simple expressions, suggesting that integrability is playing an important role.doi:10.3204/PUBDB-2015-03413info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionIntegrability in Gauge and String Theory, IGST 2014, Hamburg, DESY Hamburg, Germany, 2014-07-14 - 2014-07-182014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/224047https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03413%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03413info:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:2240482019-11-15T21:19:40Zec_fundedresourcesVDBopenaireengBargheer, TillComputing Three-Point Functions for Short OperatorsI will explain how to compute three-point structure constants for "short" primary operators of N=4 super Yang-Mills theory that are dual to point-like strings in AdS. In a semiclassical analysis, their interaction is mapped to a flat-space IIB string theory calculation to leading order at large 't Hooft coupling. Once the correct vertex operators are identified, the interaction can be computed straightforwardly. This way, the three-point functions for any combination of operators dual to string states at the massless and first massive level have been obtained. The method is validated by a match with the known supergravity result for three chiral primary operators (massless states). For three states at the first massive level, the result yields the structure constant for three members of the Konishi multiplet.info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionSeminar, Berlin, Humboldt University Berlin, Germany, 2014-02-282014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/224048https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03414%22Researchersinfo:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:2240492019-11-15T21:19:40Zec_fundedresourcesVDBopenaireengBargheer, TillComputing Three-Point Functions for Short OperatorsI will explain how to compute three-point structure constants for "short" primary operators of N=4 super Yang-Mills theory that are dual to point-like strings in AdS. In a semiclassical analysis, their interaction is mapped to a flat-space IIB string theory calculation to leading order at large 't Hooft coupling. Once the correct vertex operators are identified, the interaction can be computed straightforwardly. This way, the three-point functions for any combination of operators dual to string states at the massless and first massive level have been obtained. The method is validated by a match with the known supergravity result for three chiral primary operators (massless states). For three states at the first massive level, the result yields the structure constant for three members of the Konishi multiplet.info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionSeminar, Hannover, Leibniz Universität Hannover, Germany, 2014-03-032014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/224049https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03415%22Researchersinfo:eu-repo/grantAgreement/EC//299865
oai:bib-pubdb1.desy.de:2244612021-11-10T12:16:55Zec_fundedresourcesVDBopenaireengSchloffer, MartinRashkova, BoryanaSchöberl, ThomasSchwaighofer, EmanuelZhang, ZaoliClemens, HelmutMayer, SveaEvolution of the $\omega$${_o}$ phase in a $\beta$-stabilized multi-phase TiAl alloy and its effect on hardnessinfo:eu-repo/classification/ddc/670The intermetallic b-stabilized Ti–43.5Al–4Nb–1Mo–0.1B alloy (in at.%), termed TNM alloy, is designed to be used at elevated temperatures,typically up to 750 C. To understand the evolution of the microstructures during heat treatments and subsequent creep tests,an understanding of the phase transformations and decomposition reactions that occur is necessary. The present study deals with thedevelopment and growth mechanism of the ω${_o}$ phase, which forms in the b${_o}$ phase during static annealing treatments and creep testsperformed at 750, 780 and 800 C using an applied stress of 150 MPa. In situ high-energy X-ray diffraction experiments were conducted to investigate the decomposition behaviour of the ω${_o}$ phase during heating as well as to determine its dissolution temperature. Highresolutiontransmission electron microscopy was used to study the coarsening of xo grains during creep. The chemical compositionof b${_o}$ and ω${_o}$ was determined by means of energy dispersive X-ray microanalysis. In particular, the impact of the Mo content on thegrowth of the ω${_o}$ grains within the b${_o}$ matrix was investigated. Additionally, nanohardness measurements in c, a${_2}$, b${_o}$ and (b${_o}$ + ω${_o}$) grainswere performed by cube corner indentation. The results show that b${_o}$ is the hardest phase in the TiAl–Nb–Mo alloy system when finelydispersed xo precipitates are present.Acta materialia 64, 241 - 252 (2014). doi:10.1016/j.actamat.2013.10.036info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2014info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/224461https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03594%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2013.10.036info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/wos/WOS:000331017800024info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2748362022-08-30T08:35:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengWorbs, LenaGeneration of ultrashort UV pulses and R2PI measurements of deflected moleculesThis thesis is about the generation and characterization of ultrashort ultraviolet (UV) laser pulses, resonance-enhanced two photon ionization (R2PI) measurements of indole and the electrostatic deflection of indole.UV pulses are generated from a 39 fs Ti:Sapphire Laser with a central wavelength of 800 nm and a bandwidth of 60 nm. To generate UV pulses, the nonlinear process of harmonic generation in a beta-barium-borate (BBO)-crystal is used. A prism compressor ensures group velocity dispersion (GVD) compensation and a cross cor- relation is used to measure the pulse duration of the generated UV pulses. An energy conversion efficiency of up to 6 % of the fundamental energy is achieved to produce UV pulses and the generated pulses have a theoretical minimum pulse duration of 35 fs due to the spectrum.R2PI measurements are used to identify the fragmentation of indole (C8H7N) at UV pulses in comparison to the fragmentation at IR pulses. Additionally, the spatial deflection of indole due to an electric field is measured.The time of flight mass spectra (TOF MS) of indole show great differences when the molecule is ionized by IR or UV pulses, respectively. With UV pulses it is possible to ionize the molecule almost without fragments or background.Hamburg 65 pp. (2015). doi:10.3204/PUBDB-2015-03619 = Universität Hamburg, Bachelorarbeit, 2015info:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/274836https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03619%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03619info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2748372021-11-10T12:17:09Zec_fundedresourcesdriverVDBopen_accessopenaireengWeiglein, GeorgWP1 Status and Visions - theorydoi:10.3204/PUBDB-2015-03620info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionFirst Annual Meeting of ITN HiggsTools, Freiburg, Germany, 2015-04-15 - 2015-04-172015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/274837https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03620%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03620info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2749212024-02-27T15:22:02Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBustamante, MauricioBeacom, John F.Winter, WalterTheoretically palatable flavor combinations of astrophysical neutrinosflavor: rationeutrino: mixingIceCubenew physicsneutrino: propagationneutrino: interactionfluxThe flavor composition of high-energy astrophysical neutrinos can reveal the physics governing their production, propagation, and interaction. The IceCube Collaboration has published the first experimental determination of the ratio of the flux in each flavor to the total. We present, as a theoretical counterpart, new results for the allowed ranges of flavor ratios at Earth for arbitrary flavor ratios in the sources. Our results will allow IceCube to more quickly identify when their data imply standard physics, a general class of new physics with arbitrary (incoherent) combinations of mass eigenstates, or new physics that goes beyond that, e.g., with terms that dominate the Hamiltonian at high energy.doi:10.3204/PUBDB-2015-03689info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/274921https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03689%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1506.02645info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03689info:eu-repo/grantAgreement/EC//646623
oai:bib-pubdb1.desy.de:2749272025-07-17T08:55:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengJoseph, AnoshReview of Lattice Supersymmetry and Gauge-Gravity Dualityinfo:eu-repo/classification/ddc/530gauge field theory: thermalblack hole: quantumsupersymmetryfinite temperaturequantum mechanicsstrong couplingquantum gravitygravitation: dualitylatticeWe review the status of recent investigations on validating the gauge-gravity duality conjecture through numerical simulations of strongly coupled maximally supersymmetric thermal gauge theories. In the simplest setting, the gauge-gravity duality connects systems of D0-branes and black hole geometries at finite temperature to maximally supersymmetric gauged quantum mechanics at the same temperature. Recent simulations show that non-perturbative gauge theory results give excellent agreement with the quantum gravity predictions, thus proving strong evidence for the validity of the duality conjecture and more insight into quantum black holes and gravity.International journal of modern physics / A 30(27), 1530054 (2015). doi:10.1142/S0217751X15300549info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWorld Scientific Publ.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/274927https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03695%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0217-751Xinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1509.01440info:eu-repo/semantics/altIdentifier/doi/10.1142/S0217751X15300549info:eu-repo/semantics/altIdentifier/wos/WOS:000362454700001info:eu-repo/grantAgreement/EC//279943
oai:bib-pubdb1.desy.de:2749352021-11-10T12:17:51Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengComan, IoanaGabella, MaximeTeschner, JoergLine operators in theories of class S, quantized moduli space of flat connections, and Toda field theoryfield theory: Todaalgebra: noncommutativegauge field theory: supersymmetryfield theory: nonperturbativequantizationmoduli spaceChern-Simons termRiemann surfaceholonomyVerlindenetworkSL(N)Non-perturbative aspects of $\mathcal{N}=2$ supersymmetric gauge theories of class $\mathcal{S}$ are deeply encoded in the algebra of functions on the moduli space $\mathcal{M}_\text{flat}$ of flat $SL(N)$-connections on Riemann surfaces. Expectation values of Wilson and 't Hooft line operators are related to holonomies of flat connections, and expectation values of line operators in the low-energy effective theory are related to Fock-Goncharov coordinates on $\mathcal{M}_\text{flat}$. Via the decomposition of UV line operators into IR line operators, we determine their noncommutative algebra from the quantization of Fock-Goncharov Laurent polynomials, and find that it coincides with the skein algebra studied in the context of Chern-Simons theory. Another realization of the skein algebra is generated by Verlinde network operators in Toda field theory. Comparing the spectra of these two realizations provides non-trivial support for their equivalence. Our results can be viewed as evidence for the generalization of the AGT correspondence to higher-rank class $\mathcal{S}$ theories.doi:10.3204/PUBDB-2015-03703info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/274935https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03703%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03703info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1505.05898info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2751332022-08-30T08:35:32Zec_fundedresourcesVDBopenaireengKüpper, JochenCold and controlled complex moleculesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionWorkshop Clusterphysik, Lindow, Lindow, Germany, 2015-09-20 - 2015-09-252015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/275133https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03831%22Researchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2751552022-08-30T08:35:33Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKruse, ChristianThe FEL-Simulator Imaging Nano-Particle Injectors Using Strong-Field-Ionisation Time-Of-Flight Mass-Spectrometry1-45 (2015). doi:10.3204/PUBDB-2015-03841 = Imperial College, London, Masterarbeit, 2015info:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275155https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03841%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03841info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2752212017-07-27T20:58:20Zoai:bib-pubdb1.desy.de:2752792021-11-10T12:18:52Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBroy, BenedictCiupke, DavidPedro, Francisco G.Westphal, AlexanderStarobinsky-Type Inflation from $\alpha'$-CorrectionsWorking in the Large Volume Scenario (LVS) of IIB Calabi-Yau flux compactifications, we construct inflationary models from recently computed higher derivative $(\alpha')^3$-corrections. Inflation is driven by a Kaehler modulus whose potential arises from the aforementioned corrections, while we use the inclusion of string loop effects just to ensure the existence of a graceful exit when necessary. The effective inflaton potential takes a Starobinsky-type form $V=V_0(1-e^{-\nu\phi})^2$, where we obtain one set-up with $\nu=-1/\sqrt{3}$ and one with $\nu=2/\sqrt{3}$ corresponding to inflation occurring for increasing or decreasing $\phi$ respectively. The inflationary observables are thus in perfect agreement with PLANCK, while the two scenarios remain observationally distinguishable via slightly varying predictions for the tensor-to-scalar ratio $r$. Both set-ups yield $r\simeq (2\ldots 7)\,\times 10^{-3}$. They hence realise inflation with moderately large fields $\left(\Delta\phi\sim 6\thinspace M_{Pl}\right)$ without saturating the Lyth bound. Control over higher corrections relies in part on tuning underlying microscopic parameters, and in part on intrinsic suppressions. The intrinsic part of control arises as a leftover from an approximate effective shift symmetry at parametrically large volume.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275279https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03906%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1509.00024info:eu-repo/grantAgreement/EC//320421
oai:bib-pubdb1.desy.de:2753312021-11-10T12:18:59Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengWissbrock, Fabian$O(\alpha_s^3)$ contributions to the heavy flavor Wilson coefficients of the structure function $F_2(x, Q^2)$ at $Q^2 \gg m^2$Dortmund : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 214 pp. (2015). = Technische Universität Dortmund, Diss., 2015info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionVerlag Deutsches Elektronen-Synchrotron2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275331https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03937%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//257638
oai:bib-pubdb1.desy.de:2754092025-07-17T08:53:25Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNanni, Emilio A.Huang, Wenqian R.Hong, Kyung-HanRavi, KoustubanFallahi, AryaMoriena, GustavoDwayne Miller, R. J.Kaertner, FranzTerahertz-driven linear electron accelerationinfo:eu-repo/classification/ddc/500The cost, size and availability of electron accelerators are dominated by the achievable accelerating gradient. Conventional high-brightness radio-frequency accelerating structures operate with 30–50 MeV m$^{-1}$gradients. Electron accelerators driven with optical or infrared sources have demonstrated accelerating gradients orders of magnitude above that achievable with conventional radio-frequency structures. However, laser-driven wakefield accelerators require intense femtosecond sources and direct laser-driven accelerators suffer from low bunch charge, sub-micron tolerances and sub-femtosecond timing requirements due to the short wavelength of operation. Here we demonstrate linear acceleration of electrons with keVenergy gain using optically generated terahertz pulses. Terahertz-driven accelerating structures enable high-gradient electron/proton accelerators with simple accelerating structures, high repetition rates and significant charge per bunch. These ultra-compact terahertz accelerators with extremely short electron bunches hold great potential to have a transformative impact for free electron lasers, linear colliders, ultrafast electron diffraction, X-ray science and medical therapy with X-rays and electron beams.Nature Communications 6, 8486 (2015). doi:10.1038/ncomms9486info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275409https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-03988%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/2041-1723info:eu-repo/semantics/altIdentifier/pmid/pmid:26439410info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-03988info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms9486info:eu-repo/semantics/altIdentifier/wos/WOS:000364941100001info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2754392025-07-30T09:33:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBernardoni, FabioBlossier, BenoîtBulava, JohnDella Morte, MicheleFritzsch, PatrickGarron, NicolasGérardin, AntoineHeitger, Jochenvon Hippel, GeorgSimma, HubertB-meson spectroscopy in HQET at order 1 / minfo:eu-repo/classification/ddc/530We present a study of the B spectrum performed in the framework of heavy quark effective theory expanded to next-to-leading order in 1/m$_b$ and nonperturbative in the strong coupling. Our analyses have been performed on N$_f$=2 lattice gauge field ensembles corresponding to three different lattice spacings and a wide range of pion masses. We obtain the Bs-meson mass and hyperfine splittings of the B- and B$_s$-mesons that are in good agreement with the experimental values and examine the mass difference mBs−mB as a further cross-check of our previous estimate of the b-quark mass. We also report on the mass splitting between the first excited state and the ground state in the B and B$_s$ systems.Physical review / D 92(5), 054509 (2015). doi:10.1103/PhysRevD.92.054509info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275439https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04016%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.92.054509info:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1505.03360info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/semantics/altIdentifier/wos/WOS:000361669800006info:eu-repo/grantAgreement/EC//283493
oai:bib-pubdb1.desy.de:2754522025-07-30T09:33:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBanerjee, D.Hebenstreit, F.Jiang, F.-J.Wiese, U.-J.Real-time simulation of nonequilibrium transport of magnetization in large open quantum spin systems driven by dissipationinfo:eu-repo/classification/ddc/530Using quantum Monte Carlo, we study the nonequilibrium transport of magnetization in large open strongly correlated quantum spin-12 systems driven by purely dissipative processes that conserve the uniform or staggered magnetization, disregarding unitary Hamiltonian dynamics. We prepare both a low-temperature Heisenberg ferromagnet and an antiferromagnet in two parts of the system that are initially isolated from each other. We then bring the two subsystems in contact and study their real-time dissipative dynamics for different geometries. The flow of the uniform or staggered magnetization from one part of the system to the other is described by a diffusion equation that can be derived analytically.Physical review / B 92(12), 121104 (2015). doi:10.1103/PhysRevB.92.121104info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275452https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04029%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.92.121104info:eu-repo/semantics/altIdentifier/issn/0556-2805info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/wos/WOS:000360962300001info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/grantAgreement/EC//339220
oai:bib-pubdb1.desy.de:2754552025-07-30T09:33:30Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengHebenstreit, F.Banerjee, D.Hornung, M.Jiang, F.-J.Schranz, F.Wiese, U.-J.Real-time dynamics of open quantum spin systems driven by dissipative processesinfo:eu-repo/classification/ddc/530We study the real-time evolution of large open quantum spin systems in two spatial dimensions, whose dynamics is entirely driven by a dissipative coupling to the environment. We consider different dissipative processes and investigate the real-time evolution from an ordered phase of the Heisenberg or XY model towards a disordered phase at late times, disregarding unitary Hamiltonian dynamics. The corresponding Kossakowski-Lindblad equation is solved via an efficient cluster algorithm. We find that the symmetry of the dissipative process determines the time scales, which govern the approach towards a new equilibrium phase at late times. Most notably, we find a slow equilibration if the dissipative process conserves any of the magnetization Fourier modes. In these cases, the dynamics can be interpreted as a diffusion process of the conserved quantity.Physical review / B 92(3), 035116 (2015). doi:10.1103/PhysRevB.92.035116info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275455https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04032%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000357635500001info:eu-repo/semantics/altIdentifier/issn/0556-2805info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.92.035116info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/grantAgreement/EC//339220
oai:bib-pubdb1.desy.de:2754572025-07-30T09:33:30Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRudy, AlexanderHorns, DieterCosta, EnricoFunk, StephanHays, ElizabethLobanov, AndreiMax, ClaireMayer, MichaelMignani, RobertoO’Dell, Stephen L.Romani, RogerTavani, MarcoDeLuca, AndreaWeisskopf, Martin C.Kolodziejczak, JefferyTennant, AllynYuan, YajieBuehler, RolfArons, JonathonBlandford, RogerCaraveo, PatriziaCharacterization of the inner knot of the crab: The site of the gamma-ray flares?info:eu-repo/classification/ddc/520A particularly intriguing recent result from γ-ray astronomy missions is the detection of powerful flares from the Crab Nebula, which challenges the current understanding of pulsar wind nebulae and acceleration mechanisms. To search for the production site(s) of these flares, we conducted a multi-wavelength observing campaign using Keck, the Hubble Space Telescope (HST), and the Chandra X-ray Observatory. As the short timescales of the γ-ray flares ($\lesssim 1$ day) suggest a small emitting region, the Crab's inner knot (about 0.6 arcsec from the pulsar) is a candidate site for such flaring. This paper describes observations of the inner knot, seeking to understand its nature and possible relationship with γ-ray flares. Using singular-value decomposition, analysis of the HST images yielded results consistent with traditional methods while substantially reducing some uncertainties. These analyses show that the knot's intrinsic properties (especially size and brightness) are correlated with its (projected) separation from the pulsar. This characterization of the inner knot helps in constraining standard shock model parameters, under the assumption that the knot lies near the shocked surface. While the standard shock model gives good agreement in several respects, two puzzles persist: (a) the observed angular size of the knot relative to the pulsar–knot separation is much smaller than expected; and (b) the variable high degree of polarization (reported by others) is difficult to reconcile with a highly relativistic downstream flow. However, the IR–optical flux of the inner knot is marginally consistent with the shock accelerating most of the Nebula's optical-emitting particles.The astrophysical journal / 1 811(1), 24 (2015). doi:10.1088/0004-637X/811/1/24info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionUniv.110322015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275457https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04034%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000363471600025info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04034info:eu-repo/semantics/altIdentifier/issn/1538-4357info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/811/1/24info:eu-repo/semantics/altIdentifier/issn/0004-637xinfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/grantAgreement/EC//267251
oai:bib-pubdb1.desy.de:2754802025-07-17T08:53:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKalirai, SamBoesenberg, UlrikeFalkenberg, GeraldMeirer, FlorianWeckhuysen, Bert M.X-ray Fluorescence Tomography of Aged Fluid-Catalytic-Cracking Catalyst Particles Reveals Insight into Metal Deposition Processesinfo:eu-repo/classification/ddc/540Microprobe X-ray fluorescence tomography was used to investigate metal poison deposition in individual, intact and industrially deactivated fluid catalytic cracking (FCC) particles at two differing catalytic life-stages. 3 D multi-element imaging, at submicron resolution was achieved by using a large-array Maia fluorescence detector. Our results show that Fe, Ni and Ca have significant concentration at the exterior of the FCC catalyst particle and are highly co-localized. As concentrations increase as a function of catalytic life-stage, the deposition profiles of Fe, Ni, and Ca do not change significantly. V has been shown to penetrate deeper into the particle with increasing catalytic age. Although it has been previously suggested that V is responsible for damaging the zeolite components of FCC particles, no spatial correlation was found for V and La, which was used as a marker for the embedded zeolite domains. This suggests that although V is known to be detrimental to zeolites in FCC particles, a preferential interaction does not exist between the two.ChemCatChem 7, 3674-3682 (2015). doi:10.1002/cctc.201500710 special issue: "Advanced Microscopy and Spectroscopy for Catalysis"info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWILEY-VCH Verlag2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275480https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04048%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1867-3899info:eu-repo/semantics/altIdentifier/pmid/pmid:26613011info:eu-repo/semantics/altIdentifier/wos/WOS:000365116400009info:eu-repo/semantics/altIdentifier/issn/1867-3880info:eu-repo/semantics/altIdentifier/doi/10.1002/cctc.201500710info:eu-repo/grantAgreement/EC//321140
oai:bib-pubdb1.desy.de:2757042025-07-30T09:33:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengIsachenkov, MikhailKirsch, IngoSchomerus, VolkerChiral ring of strange metals: The multicolor limitinfo:eu-repo/classification/ddc/530The low energy limit of a dense 2D adjoint QCD is described by a family of ${\cal N}=(2,2)$ supersymmetric coset conformal field theories. In previous work we constructed chiral primaries for a small number $N < 6$ of colors. Our aim in the present note is to determine the chiral ring in the multicolor limit where $N$ is sent to infinity. We shall find that chiral primaries are labeled by partitions and identify the ring they generate as the ring of Schur polynomials. Our findings impose strong constraints on the possible dual description through string theory in an $AdS_3$ compactification.Nuclear physics <Amsterdam> / B 897, 660 - 677 (2015). doi:10.1016/j.nuclphysb.2015.06.010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth-Holland Publ. Co.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275704https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04188%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2015.06.010info:eu-repo/semantics/altIdentifier/wos/WOS:000358623600026info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04188info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1410.4594info:eu-repo/semantics/altIdentifier/issn/1873-1562info:eu-repo/semantics/altIdentifier/issn/0550-3213info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2757102025-07-30T09:33:56Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, J.Schomerus, V.Sprenger, M.The Bethe roots of Regge cuts in strongly coupled N = 4 SYM theoryinfo:eu-repo/classification/ddc/530We describe a general algorithm for the computation of the remainder function for n-gluon scattering in multi-Regge kinematics for strongly coupled planar \( \mathcal{N}=4 \) super Yang-Mills theory. This regime is accessible through the infrared physics of an auxiliary quantum integrable system describing strings in AdS5 ×S5. Explicit formulas are presented for n = 6 and n = 7 external gluons. Our results are consistent with expectations from perturbative gauge theory. This paper comprises the technical details for the results announced in 1.Journal of high energy physics 1507(7), 98 (2015). doi:10.1007/JHEP07(2015)098info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275710https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04194%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04194info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2015)098info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1411.2594info:eu-repo/semantics/altIdentifier/wos/WOS:000358613700001info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2757122025-07-17T08:54:13Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBuchmuller, WilfriedDudas, EmilianHeurtier, LucienWestphal, AlexanderWieck, ClemensWinkler, Martin WolfgangChallenges for large-field inflation and moduli stabilizationinfo:eu-repo/classification/ddc/530We analyze the interplay between Kähler moduli stabilization and chaotic inflation in supergravity. While heavy moduli decouple from inflation in the supersymmetric limit, supersymmetry breaking generically introduces non-decoupling effects. These lead to inflation driven by a soft mass term, m φ 2 ∼ mm 3/2, where m is a supersymmetric mass parameter. This scenario needs no stabilizer field, but the stability of moduli during inflation imposes a large supersymmetry breaking scale, m 3/2 ≫ H, and a careful choice of initial conditions. This is illustrated in three prominent examples of moduli stabilization: KKLT stabilization, Kähler Uplifting, and the Large Volume Scenario. Remarkably, all models have a universal effective inflaton potential which is flattened compared to quadratic inflation. Hence, they share universal predictions for the CMB observables, in particular a lower bound on the tensor-to-scalar ratio, r ≳ 0.05.Journal of high energy physics 1504(4), 58 (2015). doi:10.1007/JHEP04(2015)058info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275712https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04196%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1501.05812info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP04(2015)058info:eu-repo/semantics/altIdentifier/wos/WOS:000356853600001info:eu-repo/grantAgreement/EC//226371
oai:bib-pubdb1.desy.de:2757492025-07-30T09:33:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBustamante, MauricioBeacom, John F.Winter, WalterTheoretically Palatable Flavor Combinations of Astrophysical Neutrinosinfo:eu-repo/classification/ddc/550The flavor composition of high-energy astrophysical neutrinos can reveal the physics governing their production, propagation, and interaction. The IceCube Collaboration has published the first experimental determination of the ratio of the flux in each flavor to the total. We present, as a theoretical counterpart, new results for the allowed ranges of flavor ratios at Earth for arbitrary flavor ratios in the sources. Our results will allow IceCube to more quickly identify when their data imply standard physics, a general class of new physics with arbitrary (incoherent) combinations of mass eigenstates, or new physics that goes beyond that, e.g., with terms that dominate the Hamiltonian at high energy.Physical review letters 115, 161302 (2015). doi:10.1103/PhysRevLett.115.161302info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275749https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04218%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04218info:eu-repo/semantics/altIdentifier/pmid/pmid:26550861info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1506.02645info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.115.161302info:eu-repo/semantics/altIdentifier/wos/WOS:000362908700004info:eu-repo/grantAgreement/EC//646623
oai:bib-pubdb1.desy.de:2757882021-11-10T12:20:04Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKahlhoefer, FelixSchmidt-Hoberg, KaiSchwetz, ThomasVogl, StefanImplications of unitarity and gauge invariance for simplified dark matter modelsinvariance: gaugedark matter: interactionfermion: dark matterfermion: modelelectroweak interaction: precision measurementdilepton: resonanceunitaritymediationsignaturethermalWe show that simplified models used to describe the interactions of dark matter with Standard Model particles do not in general respect gauge invariance and that perturbative unitarity may be violated in large regions of the parameter space. The modifications necessary to cure these inconsistencies may imply a much richer phenomenology and lead to stringent constraints on the model. We illustrate these observations by considering the simplified model of a fermionic dark matter particle and a vector mediator. Imposing gauge invariance then leads to strong constraints from dilepton resonance searches and electroweak precision tests. Furthermore, the new states required to restore perturbative unitarity can mix with Standard Model states and mediate interactions between the dark and the visible sector, leading to new experimental signatures such as invisible Higgs decays. The resulting constraints are typically stronger than the classic constraints on DM simplified models such as monojet searches and make it difficult to avoid thermal overproduction of dark matter.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275788https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04236%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1510.02110info:eu-repo/grantAgreement/EC//638528
oai:bib-pubdb1.desy.de:2757892021-11-10T12:20:04Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLemos, MadalenaLiendo, PedroBootstrapping ${\mathcal N}=2$ chiral correlatorsWe apply the numerical bootstrap program to chiral operators in four-dimensional ${\mathcal N}=2$ SCFTs. In the first part of this work we study four-point functions in which all fields have the same conformal dimension. We give special emphasis to bootstrapping a specific theory: the simplest Argyres-Douglas fixed point with no flavor symmetry. In the second part we generalize our setup and consider correlators of fields with unequal dimension. This is an example of a mixed correlator and allows us to probe new regions in the parameter space of ${\mathcal N}=2$ SCFTs. In particular, our results put constraints on relations in the Coulomb branch chiral ring and on the curvature of the Zamolodchikov metric.doi:10.3204/PUBDB-2015-04237info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275789https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04237%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1510.03866info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04237info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2758212025-07-30T09:34:37Zec_fundedresourcesVDBopenaireengArcon, IztokPaganelli, StefanoPiccolo, OresteGallo, MicheleVogel-Mikuš, KatarinaBaldi, FrancoXAS analysis of iron and palladium bonded to a polysaccharide produced anaerobically by a strain of Klebsiella oxytocainfo:eu-repo/classification/ddc/540Klebsiella oxytoca BAS-10 ferments citrate to acetic acid and CO2, and secretesa specific exopolysaccharide (EPS), which is able to bind different metallicspecies. These biomaterials may be used for different biotechnological purposes,including applications as innovative green biogenerated catalysts. In productionof biogenerated Pd species, the Fe(III) as ferric citrate is added to anaerobicculture of K. oxytoca BAS-10, in the presence of palladium species, to increasethe EPS secretion and improve Pd-EPS yield. In this process, bi-metallic (FePd-EPS) biomaterials were produced for the first time. The morphology of bimetallicEPS, and the chemical state of the two metals in the FePd-EPS, areinvestigated by transmission electron microscopy, Fourier transform infra-redspectroscopy, micro-X-ray fluorescence, and X-ray absorption spectroscopymethods (XANES and EXAFS), and compared with mono-metallic Pd-EPS andFe-EPS complexes. Iron in FePd-EPS is in the mineralized form of iron oxides/hydroxides, predominantly in the form of Fe3+, with a small amount of Fe2+ inthe structure, most probably a mixture of different nano-crystalline iron oxidesand hydroxides, as in mono-metallic Fe-EPS. Palladium is found as Pd(0) in theform of metallic nanoparticles with face-centred cubic structure in both bimetallic(FePd-EPS) and mono-metallic (Pd-EPS) species. In bi-metallic species,Pd and Fe nanoparticles agglomerate in larger clusters, but they remain spatiallyseparated. The catalytic ability of bi-metallic species (FePd-EPS) in a hydrodechlorinationreaction is improved in comparison with mono-metallic Pd-EPS.Journal of synchrotron radiation 22(5), 1215 - 1226 (2015). doi:10.1107/S1600577515010371info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIUCr2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/275821https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04252%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:26289273info:eu-repo/semantics/altIdentifier/issn/1600-5775info:eu-repo/semantics/altIdentifier/issn/0909-0495info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600577515010371info:eu-repo/semantics/altIdentifier/wos/WOS:000360142400011info:eu-repo/grantAgreement/EC//312284
oai:bib-pubdb1.desy.de:2758632025-07-17T08:54:04Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengFromme, RaimundIshchenko, AndriiWeierstall, UweLiu, WeiCherezov, VadimMetz, MarkusChowdhury, Shatabdi RoyBasu, ShibomBoutet, SébastienFromme, PetraWhite, ThomasBarty, AntonSpence, John C. H.Serial femtosecond crystallography of soluble proteins in lipidic cubic phaseinfo:eu-repo/classification/ddc/530Serial femtosecond crystallography (SFX) at X-ray free-electron lasers (XFELs) enables high-resolution protein structure determination using micrometre-sized crystals at room temperature with minimal effects from radiation damage. SFX requires a steady supply of microcrystals intersecting the XFEL beam at random orientations. An LCP–SFX method has recently been introduced in which microcrystals of membrane proteins are grown and delivered for SFX data collection inside a gel-like membrane-mimetic matrix, known as lipidic cubicphase (LCP), using a special LCP microextrusion injector. Here, it is demonstrated that LCP can also be used as a suitable carrier medium for microcrystals of soluble proteins, enabling a dramatic reduction in the amount of crystallized protein required for data collection compared with crystals delivered by liquid injectors. High-quality LCP–SFX data sets were collected for two soluble proteins, lysozyme and phycocyanin, using less than 0.1 mg of each protein.IUCrJ 2(5), 545 - 551 (2015). doi:10.1107/S2052252515013160info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInternational Union of Crystallography (IUCr)2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275863https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04280%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000360067300010info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04280info:eu-repo/semantics/altIdentifier/issn/2052-2525info:eu-repo/semantics/altIdentifier/pmid/pmid:26306196info:eu-repo/semantics/altIdentifier/doi/10.1107/S2052252515013160info:eu-repo/grantAgreement/EC//317079
oai:bib-pubdb1.desy.de:2758732025-07-30T09:34:36Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengPanneels, ValérieWu, WentingCapitani, GuidoMilne, ChrisPadeste, CelestinoPedrini, BillLi, Xiao-DanStandfuss, JörgAbela, RafaelSchertler, GebhardTsai, Ching-JuNogly, PrzemekRheinberger, JanJaeger, KathrinCicchetti, GregorGati, CorneliusKick, Leonhard M.Sala, LeonardoTime-resolved structural studies with serial crystallography: A new light on retinal proteinsinfo:eu-repo/classification/ddc/530Structural information of the different conformational states of the two prototypical light-sensitive membrane proteins, bacteriorhodopsin and rhodopsin, has been obtained in the past by X-ray cryo-crystallography and cryo-electron microscopy. However, these methods do not allow for the structure determination of most intermediate conformations. Recently, the potential of X-Ray Free Electron Lasers (X-FELs) for tracking the dynamics of light-triggered processes by pump-probe serial femtosecond crystallography has been demonstrated using 3D-micron-sized crystals. In addition, X-FELs provide new opportunities for protein 2D-crystal diffraction, which would allow to observe the course of conformational changes of membrane proteins in a close-to-physiological lipid bilayer environment. Here, we describe the strategies towards structural dynamic studies of retinal proteins at room temperature, using injector or fixed-target based serial femtosecond crystallography at X-FELs. Thanks to recent progress especially in sample delivery methods, serial crystallography is now also feasible at synchrotron X-ray sources, thus expanding the possibilities for time-resolved structure determination.Structural dynamics 2(4), 041718 (2015). doi:10.1063/1.4922774info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAIP Publishing LLC2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275873https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04290%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/2329-7778info:eu-repo/semantics/altIdentifier/pmid/pmid:26798817info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4922774info:eu-repo/semantics/altIdentifier/wos/WOS:000360649200020info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04290info:eu-repo/grantAgreement/EC//317079info:eu-repo/grantAgreement/EC//637295
oai:bib-pubdb1.desy.de:2758902025-07-30T09:34:44Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBargheer, TillHuang, Yu-tinLoebbert, FlorianYamazaki, MasahitoIntegrable Amplitude Deformations for N=4 Super Yang-Mills and ABJM Theoryinfo:eu-repo/classification/ddc/530supersymmetry: 4deformationABJM modelscattering amplitudeR-matrixYangianYang-Mills: supersymmetryWe study Yangian-invariant deformations of scattering amplitudes in 4d N=4 super Yang-Mills theory and 3d N=6 Aharony-Bergman-Jafferis-Maldacena (ABJM) theory. In particular, we obtain the deformed Graßmannian integral for 4d N=4 supersymmetric Yang-Mills theory, both in momentum and momentum-twistor space. For 3d ABJM theory, we initiate the study of deformed scattering amplitudes. We investigate general deformations of on-shell diagrams, and find the deformed Graßmannian integral for this theory. We furthermore introduce the algebraic R-matrix construction of deformed Yangian invariants for ABJM theory.Physical review / D 91(2), 026004 (2015). doi:10.1103/PhysRevD.91.026004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/275890https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04307%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/wos/WOS:000348398900002info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04307info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1407.4449info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.91.026004info:eu-repo/grantAgreement/EC//299865info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2759052022-08-30T08:35:33Zec_fundedresourcesVDBopenairegerKüpper, JochenProseminar: MolekülphysikModerne Themen der Molekülphysik – Ausarbeitung eines Vortrags und Referats zu einem Thema zur Kontrolle und Abbildung von Molekülen und Moleküldynamik. Wir werden bis etwa Weihnachten die Themen allgemein besprechen und in den wissenschaftlichen Kontext setzen. Danach bereiten Sie Ihre Referate und Vorträge vor, welche dann Ende des Semesters gehalten werden.info:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionLecture at Universität Hamburg (Hamburg, Germany), 16 Oct 2015 - 29 Jan 20162015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/275905https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04310%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2759582022-08-30T08:35:33Zec_fundedresourcesVDBopenaireengKüpper, JochenControlled Molecule Imaginginfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionELI Beamlines Scientific Challenges 2015, Prague, Štiřín Castle, Czech Republic, 2015-10-19 - 2015-10-222015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/275958https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04339%22Researchersinfo:eu-repo/grantAgreement/EC//614507info:eu-repo/grantAgreement/EC//641789
oai:bib-pubdb1.desy.de:2760872023-03-10T11:03:03Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDuerr, MichaelFileviez Perez, PavelSmirnov, JuriGamma-Ray Excess and the Minimal Dark Matter ModelWe point out that the gamma-ray excesses in the galactic center and in the dwarf galaxy Reticulum II can both be well explained within the simplest dark matter model. We find that the corresponding region of parameter space will be tested by direct and indirect dark matter searches in the near future.doi:10.3204/PUBDB-2015-04425info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276087https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04425%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1510.07562info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04425info:eu-repo/grantAgreement/EC//638528
oai:bib-pubdb1.desy.de:2763212025-07-17T08:53:56Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengWu, XiaojunZhou, ChunHuang, Wenqian RonnyAhr, FrederikeKärtner, Franz X.Temperature dependent refractive index and absorption coefficient of congruent lithium niobate crystals in the terahertz rangeinfo:eu-repo/classification/ddc/530Optical rectification with tilted pulse fronts in lithium niobate crystals is one of the most promising methods to generate terahertz (THz) radiation. In order to achieve higher optical-to-THz energy efficiency, it is necessary to cryogenically cool the crystal not only to decrease the linear phonon absorption for the generated THz wave but also to lengthen the effective interaction length between infrared pump pulses and THz waves. However, the refractive index of lithium niobate crystal at lower temperature is not the same as that at room temperature, resulting in the necessity to re-optimize or even re-build the tilted pulse front setup. Here, we performed a temperature dependent measurement of refractive index and absorption coefficient on a 6.0 mol% MgO-doped congruent lithium niobate wafer by using a THz time-domain spectrometer (THz-TDS). When the crystal temperature was decreased from 300 K to 50 K, the refractive index of the crystal in the extraordinary polarization decreased from 5.05 to 4.88 at 0.4 THz, resulting in ~1° change for the tilt angle inside the lithium niobate crystal. The angle of incidence on the grating for the tilted pulse front setup at 1030 nm with demagnification factor of −0.5 needs to be changed by 3°. The absorption coefficient decreased by 60% at 0.4 THz. These results are crucial for designing an optimum tilted pulse front setup based on lithium niobate crystals.Optics express 23(23), 29729 - 29737 (2015). doi:10.1364/OE.23.029729info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276321https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04552%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:26698455info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04552info:eu-repo/semantics/altIdentifier/wos/WOS:000366611500041info:eu-repo/semantics/altIdentifier/issn/1094-4087info:eu-repo/semantics/altIdentifier/doi/10.1364/OE.23.029729info:eu-repo/grantAgreement/EC//609920
oai:bib-pubdb1.desy.de:2763872025-07-17T08:53:52Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLiekhus-Schmaltz, Chelsea E.Tenney, IanCoffee, RyanDevin, JulienErk, BenjaminFerguson, Ken R.Field, Robert W.Foucar, LutzFrasinski, Leszek J.Glownia, James M.Gühr, MarkusKamalov, AndreiOsipov, TimurKrzywinski, JacekLi, HengMarangos, Jonathan P.Martinez, Todd J.McFarland, Brian K.Miyabe, ShungoMurphy, BrendanNatan, AdiRolles, DanielRudenko, ArtemSanchez-Gonzalez, AlvaroSiano, MarcoSimpson, Emma R.Spector, LimorSwiggers, MicheleWalke, DanielWang, SongWeber, ThorstenBucksbaum, Philip H.Petrovic, Vladimir S.Berrah, NoraBoll, RebeccaBomme, CedricBostedt, ChristophBozek, John D.Carron, SebastianUltrafast isomerization initiated by X-ray core ionizationinfo:eu-repo/classification/ddc/500Rapid proton migration is a key process in hydrocarbon photochemistry. Charge migration and subsequent proton motion can mitigate radiation damage when heavier atoms absorb X-rays. If rapid enough, this can improve the fidelity of diffract-before-destroy measurements of biomolecular structure at X-ray-free electron lasers. Here we study X-ray-initiated isomerization of acetylene, a model for proton dynamics in hydrocarbons. Our time-resolved measurements capture the transient motion of protons following X-ray ionization of carbon K-shell electrons. We Coulomb-explode the molecule with a second precisely delayed X-ray pulse and then record all the fragment momenta. These snapshots at different delays are combined into a ‘molecular movie’ of the evolving molecule, which shows substantial proton redistribution within the first 12 fs. We conclude that significant proton motion occurs on a timescale comparable to the Auger relaxation that refills the K-shell vacancy.Nature Communications 6, 8199 - (2015). doi:10.1038/ncomms9199info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276387https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04605%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms9199info:eu-repo/semantics/altIdentifier/wos/WOS:000363017100027info:eu-repo/semantics/altIdentifier/issn/2041-1723info:eu-repo/semantics/altIdentifier/pmid/pmid:26354002info:eu-repo/grantAgreement/EC//290467
oai:bib-pubdb1.desy.de:2763972025-07-30T09:34:43Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengEckerskorn, NikoBowman, RichardKirian, RichardAwel, SalahWiedorn, MaxKüpper, JochenPadgett, Miles J.Chapman, Henry N.Rode, AndreiOptically Induced Forces Imposed in an Optical Funnel on a Stream of Particles in Air or Vacuum info:eu-repo/classification/ddc/530Optical trapping of light-absorbing particles in a gaseous environment is governed by a laser-induced photophoretic force, which can be orders of magnitude stronger than the force of radiation-pressure induced by the same light intensity. In spite of many experimental studies, the exact theoretical background underlying the photophoretic force and the prediction of its influence on the particle motion is still in its infancy. Here, we report the results of a quantitative analysis of the photophoretic force and the stiffness of trapping achieved by levitating graphite and carbon-coated glass shells of calibrated sizes in an upright diverging hollow-core vortex beam, which we refer to as an ‘optical funnel’. The measurements of forces were conducted in air at various gas pressures in the range from 5 mbar to 2 bar. The results of these measurements lay the foundation for mapping the optically induced force to the intensity distribution in the trap. The mapping, in turn, provides the necessary information to model flight trajectories of particles of various sizes entering the beam at given initial speed and position relative to the beam axis. Finally, we determined the limits of the parameter space for the particle speed, size, and radial offset to the beam axis, all linked to the laser power and the particular laser beam structure. These results establish the grounds for developing a touch-free optical system for precisely positioning sub-micrometer bioparticles at the focal spot of an x-ray free electron laser, which would significantly enhance the efficiency of studying nanoscale morphology of proteins and biomolecules in femtosecond coherent diffractive imaging experiments.Physical review applied 4(6), 067001 (2015). doi:10.1103/PhysRevApplied.4.064001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Physical Society2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276397https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04608%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevApplied.4.064001info:eu-repo/semantics/altIdentifier/issn/2331-7019info:eu-repo/semantics/altIdentifier/wos/WOS:000366172300001info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04608info:eu-repo/grantAgreement/EC//614507
oai:bib-pubdb1.desy.de:2764142021-11-10T12:23:14Zec_fundedresourcesdriverVDBopen_accessopenaireengShi, L.Baboi, N.Wamsat, T.Lorbeer, B.Eddy, N.Zhang, P.Habib, S.Jones, R. M.HOM Based Beam Diagnostics Study at FLASHHOM based beam diagnostics study at FLASHdoi:10.3204/PUBDB-2015-04625info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion5th Topical Workshop on Beam Diagnostics, LA3NET, Mallorca, Spain, 2015-03-23 - 2015-03-242015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276414https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04625%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04625info:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2764282021-11-10T12:23:15Zec_fundedresourcesdriverVDBopen_accessopenaireengComan-Lohi, IoanaQuantization of Moduli Spaces of Flat Connections Applications to Supersymmetric Gauge Theoriesdoi:10.3204/PUBDB-2015-04639info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionSeminar, Berlin, Humboldt University, Germany, 2015-10-21 - 2015-10-212015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276428https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04639%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04639info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2764292021-11-10T12:23:16Zec_fundedresourcesdriverVDBopen_accessopenaireengComan-Lohi, IoanaQuantization of Moduli Spaces of Flat Connections Applications to Supersymmetric Gauge Theoriesdoi:10.3204/PUBDB-2015-04640info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionDESY Theory workshop on "Physics at the LHC and beyond", Hamburg, DESY, Germany, 2015-09-29 - 2015-10-022015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276429https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04640%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04640info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2764662025-07-30T09:35:53Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLapkouski, MikalaiHaellberg, MartinStructure of mitochondrial poly(A) RNA polymerase reveals the structural basis for dimerization, ATP selectivity and the SPAX4 disease phenotype.info:eu-repo/classification/ddc/540Polyadenylation, performed by poly(A) polymerases (PAPs), is a ubiquitous post-transcriptional modification that plays key roles in multiple aspects of RNA metabolism. Although cytoplasmic and nuclear PAPs have been studied extensively, the mechanism by which mitochondrial PAP (mtPAP) selects adenosine triphosphate over other nucleotides is unknown. Furthermore, mtPAP is unique because it acts as a dimer. However, mtPAPs dimerization requirement remains enigmatic. Here, we show the structural basis for mtPAPs nucleotide selectivity, dimerization and catalysis. Our structures reveal an intricate dimerization interface that features an RNA-recognition module formed through strand complementation. Further, we propose the structural basis for the N478D mutation that drastically reduces the length of poly(A) tails on mitochondrial mRNAs in patients with spastic ataxia 4 (SPAX4), a severe and progressive neurodegenerative disease.Nucleic acids symposium series 43(18), 9065 - 9075 (2015). doi:10.1093/nar/gkv861info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionOxford Univ. Press86192015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276466https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04674%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0305-1048info:eu-repo/semantics/altIdentifier/pmid/pmid:26319014info:eu-repo/semantics/altIdentifier/issn/0261-3166info:eu-repo/semantics/altIdentifier/wos/WOS:000366406500043info:eu-repo/semantics/altIdentifier/doi/10.1093/nar/gkv861info:eu-repo/semantics/altIdentifier/issn/1362-4962info:eu-repo/semantics/altIdentifier/issn/1746-8272info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2764672025-07-30T09:35:35Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRühmann, EggertBetz, MichaelHeine, AndreasKlebe, GerhardFragment Binding Can Be Either More Enthalpy-Driven or Entropy-Driven: Crystal Structures and Residual Hydration Patterns Suggest Whyinfo:eu-repo/classification/ddc/540In lead optimization, small, enthalpically advantaged fragments have been suggested to be superior, as an entropic component will be added inevitably during late-stage optimization. Determination of thermodynamic signatures of weak-binding fragments is essential to support the decision-making process, to decide which fragment to take to further optimization. High-resolution crystal structures of six fragments binding to the S1 pocket of thrombin were determined and analyzed with respect to their thermodynamic profile. The two most potent fragments exhibiting an amidine-type scaffold are not the most enthalpic binders; instead a chloro-thiophene fragment binds more enthalpically. Two chemically very similar chloro-aromatic fragments differ strongly in their potency (430 $\mu$M vs 10 mM); their binding modes are related, but the surrounding residual water network differs. The more potent one recruits a water molecule and involves Glu192 in binding, thus succeeding in firmly capping the S1 pocket. Fragments exhibiting a rather perfect solvation pattern in their binding mode also experience the highest potency.Journal of medicinal chemistry 58(17), 6960 - 6971 (2015). doi:10.1021/acs.jmedchem.5b00812info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionACS2015info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2016-08-13DEhttps://bib-pubdb1.desy.de/record/276467https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04675%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0022-2623info:eu-repo/semantics/altIdentifier/issn/0095-9065info:eu-repo/semantics/altIdentifier/issn/1943-2992info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jmedchem.5b00812info:eu-repo/semantics/altIdentifier/wos/WOS:000361254600016info:eu-repo/semantics/altIdentifier/pmid/pmid:26270568info:eu-repo/semantics/altIdentifier/issn/1520-4804info:eu-repo/grantAgreement/EC//268145
oai:bib-pubdb1.desy.de:2764742025-07-30T09:35:35Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKyriakis, EfthimiosStravodimos, George A.Kantsadi, AnastassiaChatzileontiadou, DemetraSkamnaki, Vassiliki T.Leonidas, DemetresNatural flavonoids as antidiabetic agents. The binding of gallic and ellagic acids to glycogen phosphorylase binfo:eu-repo/classification/ddc/570We present a study on the binding of gallic acid and its dimer ellagic acid to glycogen phosphorylase (GP). Ellagic acid is a potent inhibitor with Kis of 13.4 and 7.5 μM, in contrast to gallic acid which displays Kis of 1.7 and 3.9 mM for GPb and GPa, respectively. Both compounds are competitive inhibitors with respect to the substrate, glucose-1-phoshate, and non-competitive to the allosteric activator, AMP. However, only ellagic acid functions with glucose in a strongly synergistic mode. The crystal structures of the GPb-gallic acid and GPb-ellagic acid complexes were determined at high resolution, revealing that both ligands bind to the inhibitor binding site of the enzyme and highlight the structural basis for the significant difference in their inhibitory potency.FEBS letters 589(15), 1787 - 1794 (2015). doi:10.1016/j.febslet.2015.05.013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2015info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2016-05-14DEhttps://bib-pubdb1.desy.de/record/276474https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04682%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/0014-5793info:eu-repo/semantics/altIdentifier/doi/10.1016/j.febslet.2015.05.013info:eu-repo/semantics/altIdentifier/wos/WOS:000358096200013info:eu-repo/semantics/altIdentifier/pmid/pmid:25980608info:eu-repo/semantics/altIdentifier/issn/1873-3468info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2765072025-07-30T09:36:09Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengComan, IoanaGabella, MaximeTeschner, JörgLine operators in theories of class S , quantized moduli space of flat connections, and Toda field theoryinfo:eu-repo/classification/ddc/530Non-perturbative aspects of $\mathcal{N}=2$ supersymmetric gauge theories of class $\mathcal{S}$ are deeply encoded in the algebra of functions on the moduli space $\mathcal{M}_\text{flat}$ of flat $SL(N)$-connections on Riemann surfaces. Expectation values of Wilson and 't Hooft line operators are related to holonomies of flat connections, and expectation values of line operators in the low-energy effective theory are related to Fock-Goncharov coordinates on $\mathcal{M}_\text{flat}$. Via the decomposition of UV line operators into IR line operators, we determine their noncommutative algebra from the quantization of Fock-Goncharov Laurent polynomials, and find that it coincides with the skein algebra studied in the context of Chern-Simons theory. Another realization of the skein algebra is generated by Verlinde network operators in Toda field theory. Comparing the spectra of these two realizations provides non-trivial support for their equivalence. Our results can be viewed as evidence for the generalization of the AGT correspondence to higher-rank class $\mathcal{S}$ theories.Journal of high energy physics 2015(10), 143 (2015). doi:10.1007/JHEP10(2015)143info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276507https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04708%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04708info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1505.05898info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP10(2015)143info:eu-repo/semantics/altIdentifier/wos/WOS:000363513500001info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2765102025-07-17T08:55:04Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengRetolaza, AnderUranga, Angel M.Westphal, AlexanderBifid throats for axion monodromy inflationinfo:eu-repo/classification/ddc/530We construct a simple explicit local geometry providing a ‘bifid throat’ for 5-brane axion monodromy. A bifid throat is a throat that splits into two daughter throats in the IR, containing a homologous 2-cycle family reaching down into each daughter throat. Our example consists of a deformed ℤ$_3$ × ℤ$_2$ orbifold of the conifold, which provides us with an explicit holographic dual of the bifid throat including D3-branes and fractional 5-branes at the toric singularities of our setup. Having the holographic description in terms of the dual gauge theory allows us to address the effect of 5-brane-antibrane pair backreaction including the warping effects. This leads to the size of the backreaction being small and controllable after imposing proper normalization of the inflaton potential and hence the warping scales.Journal of high energy physics 2015(7), 99 (2015). doi:10.1007/JHEP07(2015)099info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276510https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04711%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2015)099info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1504.02103info:eu-repo/semantics/altIdentifier/wos/WOS:000358450700001info:eu-repo/grantAgreement/EC//320421
oai:bib-pubdb1.desy.de:2765282021-11-10T12:24:10ZdnbdeliverydriverVDBopen_accessopenaireoai:bib-pubdb1.desy.de:2765352025-07-30T09:36:09ZopenaireVDBec_fundedresourcesengKuzmin, A.Anspoks, A.Kalinko, AleksandrTimoshenko, J.Kalendarev, R.External pressure and composition effects on the atomic and electronic structure of SnWO4info:eu-repo/classification/ddc/530Solar energy materials & solar cells 143, 627 - 634 (2015). doi:10.1016/j.solmat.2014.12.003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNorth Holland2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/276535https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04734%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.solmat.2014.12.003info:eu-repo/semantics/altIdentifier/wos/WOS:000364250200085info:eu-repo/semantics/altIdentifier/issn/0927-0248info:eu-repo/semantics/altIdentifier/issn/1879-3398info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2765362025-07-30T09:36:11Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengTimoshenko, JanisAnspoks, AndrisKalinko, AleksandrJonane, IngaKuzmin, AlexeiLocal Structure of Multiferroic $\mathrm{MnWO_4}$ and $\mathrm{Mn_{ 0.7} Co_{0.3}WO_4}$ Revealed by the Evolutionary Algorithminfo:eu-repo/classification/ddc/530A novel reverse Monte Carlo/evolutionary algorithm scheme was applied to the analysis of the W L3-edge and Mn(Co) K-edges EXAFS spectra from multiferroic MnWO4 and Mn0.7Co0.3WO4. A 3D structural model, consistent with the experimental data, was obtained, and the influence of composition and temperature on the local structure of tungstates is discussed.Ferroelectrics 483(1), 68 - 74 (2015). doi:10.1080/00150193.2015.1058687info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionTaylor & Francis2015info:eu-repo/semantics/openAccessinfo:eu-repo/date/embargoEnd/2016-10-29DEhttps://bib-pubdb1.desy.de/record/276536https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04735%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04735info:eu-repo/semantics/altIdentifier/issn/0015-0193info:eu-repo/semantics/altIdentifier/doi/10.1080/00150193.2015.1058687info:eu-repo/semantics/altIdentifier/wos/WOS:000363683200007info:eu-repo/semantics/altIdentifier/issn/1563-5112info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2765432025-07-30T09:36:02Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGruszka, Dominika T.Whelan, FionaPotts, Jennifer R.Clarke, JaneFarrance, Oliver E.Fung, Herman K. H.Paci, EmanueleJeffries, Cy M.Svergun, Dmitri I.Baldock, ClairBaumann, Christoph G.Brockwell, David J.Cooperative folding of intrinsically disordered domains drives assembly of a strong elongated proteininfo:eu-repo/classification/ddc/500Bacteria exploit surface proteins to adhere to other bacteria, surfaces and host cells. Such proteins need to project away from the bacterial surface and resist significant mechanical forces. SasG is a protein that forms extended fibrils on the surface of Staphylococcus aureus and promotes host adherence and biofilm formation. Here we show that although monomeric and lacking covalent cross-links, SasG maintains a highly extended conformation in solution. This extension is mediated through obligate folding cooperativity of the intrinsically disordered E domains that couple non-adjacent G5 domains thermodynamically, forming interfaces that are more stable than the domains themselves. Thus, counterintuitively, the elongation of the protein appears to be dependent on the inherent instability of its domains. The remarkable mechanical strength of SasG arises from tandemly arrayed ‘clamp’ motifs within the folded domains. Our findings reveal an elegant minimal solution for the assembly of monomeric mechano-resistant tethers of variable length.Nature Communications 6, 7271 (2015). doi:10.1038/ncomms8271info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionNature Publishing Group2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/276543https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04742%22Researchersinfo:eu-repo/semantics/altIdentifier/pmid/pmid:26027519info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms8271info:eu-repo/semantics/altIdentifier/wos/WOS:000357170300008info:eu-repo/semantics/altIdentifier/issn/2041-1723info:eu-repo/grantAgreement/EC//283570
oai:bib-pubdb1.desy.de:2765462025-07-17T08:55:06Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengShakur Shahabi, H.Scudino, S.Kaban, I.Stoica, M.Rütt, U.Kühn, U.Eckert, J.Structural aspects of elasto-plastic deformation of a Zr-based bulk metallic glass under uniaxial compressioninfo:eu-repo/classification/ddc/670The structural rearrangements occurring during compressive deformation of a plastically deformable Zr$_{52.5}$Ti$_{5}$Cu$_{18}$Ni$_{14.5}$Al$_{10}$ bulk metallic glass have been investigated in situ using high energy synchrotron X-rays. It was found that in the elastic regime, the atomic distances at both short and medium range order vary linearly with macroscopic stress where the atomic bonds in short range order appear significantly stiffer than medium range order. Upon elastic loading, a small fraction of bonds in the first shell is broken in the loading direction whereas some new bonds are formed in the transverse direction. Atomic strain–stress correlation at medium range order deviates from linearity at the onset of plastic deformation which was correlated to the activation of irreversible STZs. This was confirmed by quantifying the amount of atomic shear strain value during loading. The length scale of 12.5 Å indicated the largest shear strain and is thought to be the most effective length scale in the formation of STZs. The typical fracture angle of this BMG was explained by the orientation of maximum atomic shear strain at the onset of major shear band formation.Acta materialia 95, 30 - 36 (2015). doi:10.1016/j.actamat.2015.05.011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier Science2015info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2016-05-31DEhttps://bib-pubdb1.desy.de/record/276546https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04745%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2015.05.011info:eu-repo/semantics/altIdentifier/issn/1873-2453info:eu-repo/semantics/altIdentifier/issn/1359-6454info:eu-repo/semantics/altIdentifier/wos/WOS:000358626200004info:eu-repo/grantAgreement/EC//340025
oai:bib-pubdb1.desy.de:2880982021-11-10T12:24:31Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengPrice, Layne C.Peiris, Hiranya V.Frazer, JonathanEasther, RichardDesigning and testing inflationary models with Bayesian networksinflation: modelboundary conditionBayesiannetworkhierarchyreheatinghorizonEven simple inflationary scenarios have many free parameters. Beyond the variables appearing in the inflationary action, these include dynamical initial conditions, the number of fields, and couplings to other sectors. These quantities are often ignored but cosmological observables can depend on the unknown parameters. We use Bayesian networks to account for a large set of inflationary parameters, deriving generative models for the primordial spectra that are conditioned on a hierarchical set of prior probabilities describing the initial conditions, reheating physics, and other free parameters. We use $N_f$--quadratic inflation as an illustrative example, finding that the number of $e$-folds $N_*$ between horizon exit for the pivot scale and the end of inflation is typically the most important parameter, even when the number of fields, their masses and initial conditions are unknown, along with possible conditional dependencies between these parameters.doi:10.3204/PUBDB-2015-04810info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288098https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04810%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1511.00029info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04810info:eu-repo/grantAgreement/EC//647995info:eu-repo/grantAgreement/EC//306478
oai:bib-pubdb1.desy.de:2881032023-03-10T11:03:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBagnaschi, EmanueleHarlander, Robert V.Mantler, HendrikVicini, AlessandroWiesemann, MariusResummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyondstandard modelnew physicsgluon: fusionHiggs particle: productionHiggs particle: doublet: 2Higgs particle: transverse momentumtransverse momentum: momentum spectrum: calculatednumerical calculations: Monte CarloWe study the prediction for the Higgs transverse momentum distribution in gluon fusion and focus on the problem of matching fixed- and all-order perturbative results. The main sources of matching ambiguities on this distribution are investigated by means of a twofold comparison. On the one hand, we present a detailed qualitative and quantitative comparison of two recently introduced algorithms for determining the matching scale. On the other hand, we apply the results of both methods to three widely used approaches for the resummation of logarithmically enhanced contributions at small transverse momenta: the MC@NLO and POWHEG Monte Carlo approaches, and analytic resummation. While the three sets of results are largely compatible in the low-pT region, they exhibit sizable differences at large pT. We show that these differences can be significantly reduced by suitable modifications of formally subleading terms in the Monte Carlo implementations. We apply our study to the Standard Model Higgs boson and to the neutral Higgs bosons of the Two-Higgs-Doublet Model for representative scenarios of the parameter space, where the top- and bottom-quark diagrams enter the cross section at different strength.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288103https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04815%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1510.08850info:eu-repo/grantAgreement/EC//316704info:eu-repo/grantAgreement/EC//315877
oai:bib-pubdb1.desy.de:2881062021-11-10T12:24:32Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBonvini, MarcoPapanastasiou, AndrewTackmann, Frank J.Resummation and Matching of $b$-quark Mass Effects in $b\bar{b}H$ Productionp p: inclusive reactionperturbation theory: higher-orderHiggs particle: associated productionbottom: pair productioneffective field theorybottom: mass: effectnumerical calculations: Monte Carlototal cross section: calculatedresummationdeep inelastic scatteringheavy quark: productionCERN LHC Collfinal state: (Higgs particle 2bottom)We use a systematic effective field theory setup to derive the $b\bar{b}H$ production cross section. Our result combines the merits of both fixed 4-flavor and 5-flavor schemes. It contains the full 4-flavor result, including the exact dependence on the $b$-quark mass, and improves it with a resummation of collinear logarithms of $m_b/m_H$. In the massless limit, it corresponds to a reorganized 5-flavor result. While we focus on $b\bar{b}H$ production, our method applies to generic heavy-quark initiated processes at hadron colliders. Our setup resembles the variable flavor number schemes known from heavy-flavor production in deep-inelastic scattering, but also differs in some key aspects. Most importantly, the effective $b$-quark PDF appears as part of the perturbative expansion of the final result where it effectively counts as an $O(\alpha_s)$ object. The transition between the fixed-order (4-flavor) and resummation (5-flavor) regimes is governed by the low matching scale at which the $b$-quark is integrated out. Varying this scale provides a systematic way to assess the perturbative uncertainties associated with the resummation and matching procedure and reduces by going to higher orders. We discuss the practical implementation and present numerical results for the $b\bar{b}H$ production cross section at NLO+NLL. We also provide a comparison to the corresponding predictions in the fixed 4-flavor and 5-flavor results and the Santander matching prescription. Compared to the latter, we find a slightly reduced uncertainty and a larger central value, with its central value lying at the lower edge of our uncertainty band.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288106https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04818%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1508.03288info:eu-repo/grantAgreement/EC//335260
oai:bib-pubdb1.desy.de:2881182025-07-17T08:53:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengYefanov, OleksandrMariani, ValerioGati, CorneliusWhite, Thomas A.Chapman, Henry N.Barty, AntonAccurate determination of segmented X-ray detector geometryinfo:eu-repo/classification/ddc/530Recent advances in X-ray detector technology have resulted in the introduction of segmented detectors composed of many small detector modules tiled together to cover a large detection area. Due to mechanical tolerances and the desire to be able to change the module layout to suit the needs of different experiments, the pixels on each module might not align perfectly on a regular grid. Several detectors are designed to permit detector sub-regions (or modules) to be moved relative to each other for different experiments. Accurate determination of the location of detector elements relative to the beam-sample interaction point is critical for many types of experiment, including X-ray crystallography, coherent diffractive imaging (CDI), small angle X-ray scattering (SAXS) and spectroscopy. For detectors with moveable modules, the relative positions of pixels are no longer fixed, necessitating the development of a simple procedure to calibrate detector geometry after reconfiguration. We describe a simple and robust method for determining the geometry of segmented X-ray detectors using measurements obtained by serial crystallography. By comparing the location of observed Bragg peaks to the spot locations predicted from the crystal indexing procedure, the position, rotation and distance of each module relative to the interaction region can be refined. We show that the refined detector geometry greatly improves the results of experiments.Optics express 23(22), 28459 - 28470 (2015). doi:10.1364/OE.23.028459info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288118https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04830%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1364/OE.23.028459info:eu-repo/semantics/altIdentifier/issn/1094-4087info:eu-repo/semantics/altIdentifier/wos/WOS:000366578900037info:eu-repo/semantics/altIdentifier/pmid/pmid:26561117info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04830info:eu-repo/grantAgreement/EC//609920info:eu-repo/grantAgreement/EC//317079
oai:bib-pubdb1.desy.de:2883102025-07-17T08:54:19Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGamba, O.Noei, HeshmatPavelec, J.Bliem, R.Schmid, M.Diebold, U.Stierle, AndreasParkinson, G. S.Adsorption of Formic Acid on the $Fe_{3}O_{4}(001)$ Surfaceinfo:eu-repo/classification/ddc/540The adsorption of formic acid (HCOOH) on the Fe$_{3}$O$_{4}$(001) surface was studied using X-ray photoelectron spectroscopy, infrared reflection absorption spectroscopy (IRRAS), low-energy electron diffraction, and scanning tunneling microscopy (STM). At room temperature, HCOOH dissociates to form formate (HCOO–) and hydroxyl groups, facilitated by the close proximity of undercoordinated Fe$^{3+}$/O$^{2–}$ cation/anion pairs at the Fe$_{3}$O$_{4}$(001) surface. Bidentate formate species are observed in IRRAS, and their position on Fe–Fe bridge sites can be inferred from STM data. At 70 K, HCOOH is adsorbed both dissociatively and molecularly, suggesting two active sites for dissociation. Our study also demonstrates that IRRAS is possible on Fe$_{3}$O$_{4}$ single crystals with good sensitivity but that unusual peak shapes occur because the substrate is midway between a perfect conductor and a perfect dielectric.The journal of physical chemistry <Washington, DC> / C 119(35), 20459 (2015). doi:10.1021/acs.jpcc.5b05560info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2016-08-07DEhttps://bib-pubdb1.desy.de/record/288310https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04913%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000360947800027info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.5b05560info:eu-repo/semantics/altIdentifier/issn/1932-7447info:eu-repo/grantAgreement/EC//291414
oai:bib-pubdb1.desy.de:2883482021-11-10T12:24:55Zec_fundedresourcesdriverVDBopen_accessopenaireengKummer, JanisEvidence for dark matter self-interactions in Abell 3827?Self-interactions of dark matter (DM) particles can potentially lead to an observable separation between the DM halo and the stars of a galaxy moving through a region of large DM density. Such a separation has recently been observed in a galaxy falling into the core of the galaxy cluster Abell 3827. We estimated the DM self-interaction cross-section needed to reproduce the observed effects and find that the sensitivity of Abell 3827 has been significantly overestimated in a previous study. Our corrected estimate is σ̃ /m_DM∼3cm^2 g^−1 when self-interactions result in an effective drag force and σ/m_DM ∼ 1.5 cm^2 g^−1 for the case of contact interactions, in some tension with previous upper bounds.doi:10.3204/PUBDB-2015-04930info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionPASCOS 2015, Trieste, Italy, 2015-06-29 - 2015-07-032015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288348https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04930%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04930info:eu-repo/grantAgreement/EC//638528
oai:bib-pubdb1.desy.de:2884142025-07-30T09:36:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengde Blas, J.Chala, M.Santiago, J.Renormalization group constraints on new top interactions from electroweak precision datainfo:eu-repo/classification/ddc/530Anomalous interactions involving the top quark contribute to some of the most difficult observables to directly access experimentally. They can give however a sizeable correction to very precisely measured observables at the loop level. Using a model-independent effective Lagrangian approach, we present the leading indirect constraints on dimension-six effective operators involving the top quark from electroweak precision data. They represent the most stringent constraints on these interactions, some of which may be directly testable in future colliders.Journal of high energy physics 2015(9), 189 (2015). doi:10.1007/JHEP09(2015)189info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288414https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04961%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1507.00757info:eu-repo/semantics/altIdentifier/wos/WOS:000362274300002info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP09(2015)189info:eu-repo/grantAgreement/EC//279972info:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2884162021-11-10T12:24:58Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLipstein, ArthurSchomerus, VolkerTowards a Worldsheet Description of N=8 SupergravityIn this note we address the worldsheet description of 4-dimensional N=8 supergravity using ambitwistors. After gauging an appropriate current algebra, we argue that the only physical vertex operators correspond to the N=8 supermultiplet. It has previously been shown that worldsheet correlators give rise to supergravity tree level scattering amplitudes. We extend this work by proposing a definition for genus-one amplitudes that passes several consistency checks such as exhibiting modular invariance and reproducing the expected infrared behavior of 1-loop supergravity amplitudes.doi:10.3204/PUBDB-2015-04963info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288416https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-04963%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1507.02936info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-04963info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2886642021-11-10T12:25:23Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengWenskat, MarcSteder, LeaCharacterization of Optical Surface Properties of 1.3 GHz SRF cavities for the European XFELThe optical inspection of the inner surface ofsuperconducting RF cavities is a well-establishedtool at many laboratories. Its purpose is to recognizeand understand field limitations and to allow opticalquality assurance during cavity production. Within theILC-HiGrade program at DESY, as part of the XFEL cavityproduction, an automated image processing and analysisalgorithm has been developed that recognizes structuralboundaries. The properties of these boundaries can beused for characterization. The potential of this frameworkfor automated quality assurance as an integral part oflarge-scale cavity production will be outlined.4 pp. (2015).info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion17th International Conference on RF Superconductivity, SRF2015, Whistler, Canada, 2015-09-13 - 2015-09-182015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288664https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05124%22Researchersinfo:eu-repo/semantics/altIdentifier/isbn/978-3-95450-178-6info:eu-repo/grantAgreement/EC//283745info:eu-repo/grantAgreement/EC//206711
oai:bib-pubdb1.desy.de:2887202021-11-10T12:25:27Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLemos, MadalenaLiendo, Pedro$\mathcal{N}=2$ central charge bounds from $2d$ chiral algebrasWe study protected correlation functions in $\mathcal{N} = 2$ SCFT whose description is captured by a two-dimensional chiral algebra. Our analysis implies a new analytic bound for the $c$-anomaly as a function of the flavor central charge $k$, valid for any theory with a flavor symmetry $G$. Combining our result with older bounds in the literature puts strong constraints on the parameter space of $\mathcal{N}=2$ theories. In particular, it singles out a special set of models whose value of $c$ is uniquely fixed once $k$ is given. This set includes the canonical rank one $\mathcal{N}=2$ SCFTs given by Kodaira's classification.doi:10.3204/PUBDB-2015-05146info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288720https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05146%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1511.07449info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05146info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2887212025-07-17T08:53:51Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGrozin, AndreyHenn, Johannes M.Korchemsky, Gregory P.Marquard, PeterThree Loop Cusp Anomalous Dimension in QCDinfo:eu-repo/classification/ddc/550particle: massiveanomalous dimensionquantum chromodynamicsgauge field theoryinfrared problemscatteringWe present the full analytic result for the three loop angle-dependent cusp anomalous dimension in QCD. With this result, infrared divergences of planar scattering processes with massive particles can be predicted to that order. Moreover, we define a closely related quantity in terms of an effective coupling defined by the lightlike cusp anomalous dimension. We find evidence that this quantity is universal for any gauge theory and use this observation to predict the nonplanar ${n}_{f}$-dependent terms of the four loop cusp anomalous dimension.Physical review letters 114(6), 062006 (2015). doi:10.1103/PhysRevLett.114.062006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAPS2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288721https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05147%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000351206500004info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.0023info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.114.062006info:eu-repo/semantics/altIdentifier/issn/0031-9007info:eu-repo/semantics/altIdentifier/issn/1079-7114info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05147info:eu-repo/semantics/altIdentifier/pmid/pmid:25723212info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2889192025-07-30T09:36:40Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengLenser, ChristianKoehl, AnnemarieSlipukhina, IvettaDu, HongchuPatt, MartenFeyer, VitaliySchneider, Claus M.Lezaic, MarjanaWaser, RainerDittmann, ReginaFormation and Movement of Cationic Defects During Forming and Resistive Switching in $\mathrm{SrTiO_3}$ Thin Film Devicesinfo:eu-repo/classification/ddc/620The resistance switching phenomenon in many transition metal oxides is described by ion motion leading to the formation of oxygen-deficient, highly electron-doped filaments. In this paper, the interface and subinterface region of electroformed and switched metal–insulator–metal structures fabricated from a thin Fe-doped SrTiO3 (STO) film on n-conducting Nb-doped SrTiO3 crystals are investigated by photoemission electron microscopy, transmission electron microscopy, and hard X-ray photoelectron spectroscopy in order to gain a deeper understanding of cation movement in this specific system. During electroforming, the segregation of Sr to the top interface and the generation of defect-rich cones in the film are observed, apparently growing from the anode toward the cathode during electroforming. An unusual binding energy component of the Sr 3d emission line is observed which can be assigned to inline image defect complexes by performing ab initio calculations. Since this Sr component can be reversibly affected by an external electrical bias, the movement of both oxygen and Sr point defects and the formation of defect complexes inline image during resistive switching are suggested. These findings are discussed with regard to the point defect structure of the film and the local oxidation of the donor-doped substrate. In particular, the apparent dichotomy between the observation of acceptor-type defects and increased electronic conductivity in STO is addressed.Advanced functional materials 25(40), 6360 - 6368 (2015). doi:10.1002/adfm.201500851info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionWiley-VCH2015info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2016-05-18DEhttps://bib-pubdb1.desy.de/record/288919https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05171%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1002/adfm.201500851info:eu-repo/semantics/altIdentifier/issn/1057-9257info:eu-repo/semantics/altIdentifier/issn/1616-3028info:eu-repo/semantics/altIdentifier/wos/WOS:000363685900006info:eu-repo/semantics/altIdentifier/issn/1099-0712info:eu-repo/semantics/altIdentifier/issn/1616-301Xinfo:eu-repo/grantAgreement/EC//235303
oai:bib-pubdb1.desy.de:2889342019-11-15T21:27:39Zec_fundedresourcesVDBopenaireengSchmidt-Hoberg, KaiEvidence for self-interactions in Abell 3827?info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionCosmoCoffee, CERN, 2015-08-262015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/288934https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05186%22Researchersinfo:eu-repo/grantAgreement/EC//638528
oai:bib-pubdb1.desy.de:2889622025-07-30T09:36:41Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengCavaglià, AndreaCornagliotto, MartinaMattelliano, MassimoTateo, RobertoA Riemann-Hilbert formulation for the finite temperature Hubbard modelinfo:eu-repo/classification/ddc/530Bethe ansatz: thermodynamicalintegral equations: nonlinearboundary condition: twistcoupling: nonlinearfield theory: conformalHubbard modelfinite temperatureAdS/CFT correspondencetransfer matrixexcited stateintegrabilityfinite sizemirrorInspired by recent results in the context of AdS/CFT integrability, we reconsider the Thermodynamic Bethe Ansatz equations describing the 1D fermionic Hubbard model at finite temperature. We prove that the infinite set of TBA equations are equivalent to a simple nonlinear Riemann-Hilbert problem for a finite number of unknown functions. The latter can be transformed into a set of three coupled nonlinear integral equations defined over a finite support, which can be easily solved numerically. We discuss the emergence of an exact Bethe Ansatz and the link between the TBA approach and the results by Jüttner, Klümper and Suzuki based on the Quantum Transfer Matrix method. We also comment on the analytic continuation mechanism leading to excited states and on the mirror equations describing the finite-size Hubbard model with twisted boundary conditions.Journal of high energy physics 06, 015 (2015). doi:10.1007/JHEP06(2015)015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288962https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05203%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1501.04651info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP06(2015)015info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05203info:eu-repo/semantics/altIdentifier/wos/WOS:000358312700001info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2889642021-11-10T12:25:37Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengTeschner, JoergSupersymmetric gauge theories, quantisation of $\mathrm{M_{flat}}$, and conformal field theorygauge field theory: supersymmetryfield theory: Liouvillefield theory: conformalsupersymmetry: 2quantizationmoduli spacequantum mechanicslocalizationzero modeoperator: vertexinstanton: partition functionconformal blockRiemann surfacemonodromyVerlindechiralpath integralThis is the 11th article in the collection of reviews 'Exact results in N=2 supersymmetric gauge theories', ed. J. Teschner. It describes an approach to understanding the 4d/2d relations discovered by Alday, Gaiotto and Tachikawa by establishing a triangle of relations between the zero mode quantum mechanics obtained by localisation of class $\cal S$ theories, the quantum theory obtained by quantisation of Hitchin moduli spaces, and conformal field theory.doi:10.3204/PUBDB-2015-05205info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288964https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05205%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1412.7140info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05205info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2889662025-07-30T09:36:42Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengGainutdinov, AzatRead, N.Saleur, H.Vasseur, R.The periodic $s \ell$(2|1) alternating spin chain and its continuum limit as a bulk logarithmic conformal field theory at $c = 0$info:eu-repo/classification/ddc/530spin: chainfield theory: conformalalgebra: Temperley-Liebalgebra: Virasorocluster: percolationcontinuum limitcentral chargeHamiltonianfinite sizesigma modelsuperspaceaffineJordanThe periodic sℓ(2|1) alternating spin chain encodes (some of) the properties of hulls of percolation clusters, and is described in the continuum limit by a logarithmic conformal field theory (LCFT) at central charge c = 0. This theory corresponds to the strong coupling regime of a sigma model on the complex projective superspace CP$^{1|1}$ = U(2|1)/(U(1) × U(1|1)), and the spectrum of critical exponents can be obtained exactly. In this paper we push the analysis further, and determine the main representation theoretic (logarithmic) features of this continuum limit by extending to the periodic case the approach of [1] [N. Read and H. Saleur, Nucl. Phys. B 777 (2007) 316]. We first focus on determining the representation theory of the finite size spin chain with respect to the algebra of local energy densities provided by a representation of the affine Temperley-Lieb algebra at fugacity one. We then analyze how these algebraic properties carry over to the continuum limit to deduce the structure of the space of states as a representation over the product of left and right Virasoro algebras. Our main result is the full structure of the vacuum module of the theory, which exhibits Jordan cells of arbitrary rank for the Hamiltonian.Journal of high energy physics 1505(5), 114 (2015). doi:10.1007/JHEP05(2015)114info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288966https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05207%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1409.0167info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000356952900001info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05207info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP05(2015)114info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2889672021-11-10T12:25:37Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengTeschner, JoergQuantization of moduli spaces of flat connections and Liouville theoryfield theory: Liouvillefield theory: conformalmoduli spacequantizationRiemann surfaceTeichmuellerWe review known results on the relations between conformal field theory, the quantization of moduli spaces of flat PSL(2,R)-connections on Riemann surfaces, and the quantum Teichmueller theory.25 pp. (2014). doi:10.3204/PUBDB-2015-05208info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionInternational Congress of Mathematicians, ICM 2014, Seoul, korea, 2015-08-13 - 2015-08-212014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288967https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05208%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1405.0359info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05208info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2889692025-09-30T13:01:14Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBartels, J.Vacca, G. P.Generalized Bootstrap Equations and possible implications for the NLO Odderoninfo:eu-repo/classification/ddc/530gauge field theory: nonabeliansupersymmetry: 4bootstrapodderonWe formulate and discuss generalized bootstrap equations in nonabelian gauge theories. They are shown to hold in the leading logarithmic approximation. Since their validity is related to the self-consistency of the Steinmann relations for inelastic production amplitudes they can be expected to be valid also in NLO. Specializing to the N=4 SYM, we show that the validity in NLO of these generalized bootstrap equations allows to find the NLO Odderon solution with intercept exactly at one, a result which is valid also for the planar limit of QCD.The European physical journal / C 73(10), 2602 (2013). doi:10.1140/epjc/s10052-013-2602-8info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2013info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/288969https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05210%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05210info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-013-2602-8info:eu-repo/semantics/altIdentifier/wos/WOS:000325722900001info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1307.3985info:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/grantAgreement/EC//317089
oai:bib-pubdb1.desy.de:2891072019-11-15T21:27:42Zec_fundedresourcesVDBopenaireengBehring, ArndHeavy flavor corrections to deep-inelastic scattering at three loopsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionFirst Annual Meeting of ITN HiggsTools, Freiburg, Germany, 2015-04-15 - 2015-04-172015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/289107https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05234%22Researchersinfo:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2891192019-11-15T21:27:43Zec_fundedresourcesVDBopenaireengBlümlein, JohannesThe DESY-Node of Higgstoolsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionHiggsTools Mid Term Review, Brussels, Helmholtz Association, Brussels, Belgium, 2015-10-20 - 2015-10-202015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/289119https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05246%22Researchersinfo:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2891322021-11-10T12:25:41Zec_fundedresourcesdriverVDBopen_accessopenairegerAssmann, RalphDer Plasmabeschleuniger - Die 100 Milliarden Volt Maschineinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionVortragsreihe Wissenswerte, Hamburg, DESY, DESY, Germany, 2015-09-092015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/289132https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05258%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2891362021-11-10T12:25:42Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphAccelerator R&D towards a New Generation of Acceleratorsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionATS Seminar, Geneva, CERN, Switzerland, 2015-03-12 - 2015-03-122015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/289136https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05262%22Researchersinfo:eu-repo/grantAgreement/EC//312453
oai:bib-pubdb1.desy.de:2891382021-11-10T12:25:42Zec_fundedresourcesdriverVDBopen_accessopenaireengWestphal, AlexanderLarge-field inflation - String Theory & PhenomenologyThe recent combined the results from the Planck satellite and the Keck/BICEP2 telescopes have left a visibly reduced but still sizable window for large-field inflation. We will discuss its status in the context of string theory, looking both at the underlying structure visible in recent progress, and the more generic phenomenological consequences. We will also comment on recent progress towards explicit local constructions for the more 'rigid' versions of axion monodromy in warped throats, and comment on the discussion around the weak gravity conjecture.doi:10.3204/PUBDB-2015-05264info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionJoint Seminar series among ULB, VUB, KUL and UMons, Leuven, Catholic University Leuven, 2015-11-25 - 2015-11-252015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/289138https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05264%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05264info:eu-repo/grantAgreement/EC//647995
oai:bib-pubdb1.desy.de:2891402021-11-10T12:25:42Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphThe EuPRAXIA Project- a european plasma acceleratordoi:10.3204/PUBDB-2015-05266info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionAnnual meeting IZEST, Palaiseau Cedex, Laboratoires des physique des plasmas, France, 2015-10-15 - 2015-10-162015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/289140https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05266%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05266info:eu-repo/grantAgreement/EC//653782
oai:bib-pubdb1.desy.de:2891492025-07-30T09:36:47Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengNelles, A.Hörandel, J. R.Hiller, R.Huege, T.Krause, R.Link, K.Norden, M. J.Rachen, J. P.Rossetto, L.Schellart, P.Scholten, O.Schröder, F. G.Karskens, T.Veen, S. terThoudam, S.Trinh, T. N. G.Weidenhaupt, K.Wijnholds, S. J.Anderson, J.Bähren, L.Bell, M. E.Bentum, M. J.Best, P.Krause, MariaBonafede, A.Bregman, J.Brouw, W. N.Brüggen, M.Butcher, H. R.Carbone, D.Ciardi, B.de Gasperin, F.Duscha, S.Eislöffel, J.Buitink, S.Fallows, R. A.Frieswijk, W.Garrett, M. A.Haarlem, M. P. vanHeald, G.Hoeft, M.Horneffer, A.Iacobelli, M.Juette, E.Karastergiou, A.Corstanje, A.Kohler, J.Kondratiev, V. I.Kuniyoshi, M.Kuper, G.Leeuwen, J. vanMaat, P.McFadden, R.McKay-Bukowski, D.Orru, E.Paas, H.Enriquez, J. E.Pandey-Pommier, M.Pandey, V. N.Pizzo, R.Polatidis, A. G.Reich, W.Röttgering, H.Schwarz, D.Serylak, M.Sluman, J.Smirnov, O.Erdmann, M.Tasse, C.Toribio, M. C.Vermeulen, R.Weeren, R. J. vanWijers, R. A. M. J.Wucknitz, O.Zarka, P.Falcke, H.Haungs, A.Calibrating the absolute amplitude scale for air showers measured at LOFARinfo:eu-repo/classification/ddc/610Air showers induced by cosmic rays create nanosecond pulses detectable at radio frequencies. These pulses have been measured successfully in the past few years at the LOw-Frequency ARray (LOFAR) and are used to study the properties of cosmic rays. For a complete understanding of this phenomenon and the underlying physical processes, an absolute calibration of the detecting antenna system is needed. We present three approaches that were used to check and improve the antenna model of LOFAR and to provide an absolute calibration of the whole system for air shower measurements. Two methods are based on calibrated reference sources and one on a calibration approach using the diffuse radio emission of the Galaxy, optimized for short data-sets. An accuracy of 19% in amplitude is reached. The absolute calibration is also compared to predictions from air shower simulations. These results are used to set an absolute energy scale for air shower measurements and can be used as a basis for an absolute scale for the measurement of astronomical transients with LOFAR.Journal of Instrumentation 10(11), P11005 - P11005 (2015). doi:10.1088/1748-0221/10/11/P11005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst. of Physics2015info:eu-repo/semantics/embargoedAccessinfo:eu-repo/date/embargoEnd/2016-11-12DEhttps://bib-pubdb1.desy.de/record/289149https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05273%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1748-0221info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-0221/10/11/P11005info:eu-repo/semantics/altIdentifier/wos/WOS:000367676000015info:eu-repo/grantAgreement/EC//227610info:eu-repo/grantAgreement/EC//640130
oai:bib-pubdb1.desy.de:2891752025-07-30T09:36:51Zec_fundedresourcesVDBopenaireengSolozhenko, VladimirKurakevych, OleksandrLE GODEC, YannBrazhkin, Vadim V.Thermodynamically Consistent p – T Phase Diagram of Boron Oxide $\mathrm{B_{2}O_{3}}$ by in Situ Probing and Thermodynamic Analysisinfo:eu-repo/classification/ddc/540Although boron oxide B$_{2}$O$_{3}$ is an archetypical glass-forming substance of large industrial and fundamental importance, its phase diagram remains controversial. In the present work, the p–T phase diagram of B$_{2}$O$_{3}$ has been constructed based on in situ experimental data up to 8 GPa and 1900 K and thermodynamic analysis. In contrast to the previous studies, the proposed phase diagram represents only thermodynamic equilibria (reversible transformations in experiments) between crystalline (α, β) and liquid states, not influenced by kinetic phenomena.The journal of physical chemistry <Washington, DC> / C 119(35), 20600 - 20605 (2015). doi:10.1021/acs.jpcc.5b07088info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/289175https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05290%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000360947800043info:eu-repo/semantics/altIdentifier/issn/1932-7447info:eu-repo/semantics/altIdentifier/issn/1932-7455info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.5b07088info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2891762025-09-30T12:51:20Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengKurakevych, OleksandrSolozhenko, VladimirThermoelastic equation of state of boron suboxide $\mathrm{B_{6}O}$ up to 6 GPa and 2700 K: Simplified Anderson-Grüneisen model and thermodynamic consistencyinfo:eu-repo/classification/ddc/670The p-V-T equation of state of superhard boron suboxide $B_{6}O$ has been measured up to 6 GPa and 2700 K using multianvil technique and synchrotron X-ray diffraction. To fit the experimental data, the theoretical p-V-T equation of state has been derived in approximation of the constant value of the Anderson-Grüneisen parameter $\delta$$_{T}$. Bulk modulus B$_{0}$ =181 GPa and its first pressure derivative $B_{0}$$^\prime$ = 6 at 300 K; two parameters describing thermal expansion at 0.1 MPa, i.e., a = 1.4 × $10^{−5} K^{−1}$ and b = 5 × $10^{−9} K^{−2}$ as well as $\delta$$_{T}$ = 6 have been included in the model. The good agreement between fitted and experimental isobars has been achieved to the absolute volume changes up to 5% as compared to the volume at standard conditions, V$_{0}$. The fitted thermal expansion at 0.1 MPa well consistent with the experimental data as well as with ambient-pressure heat capacity c$_{p}$ , bulk modulus B$_{0}$ and $\delta$$_{T}$ describing its evolution with volume and temperature have been discussed. The fitted value of Grüneisen parameter $\gamma$ = 0.85 in agreement with previous empiric estimations for $B_{6}O$ and experimental values for other boron-rich solids has been reported.Journal of superhard materials 36(4), 270 - 278 (2014). doi:10.3103/S1063457614040054info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAllerton Press2014info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/289176https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05291%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:000340999800005info:eu-repo/semantics/altIdentifier/issn/1063-4576info:eu-repo/semantics/altIdentifier/doi/10.3103/S1063457614040054info:eu-repo/semantics/altIdentifier/issn/1934-9408info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2891792021-11-10T12:26:05Zec_fundedresourcesdriverVDBopen_accessopenaireengAssmann, RalphEuPRAXIA Kick-Off-Meetingdoi:10.3204/PUBDB-2015-05294info:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionH2020 EuPRAXIA Kick-Off-Meeting, Hamburg, DESY, DESY, Germany, 2015-11-26 - 2015-11-272015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/289179https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05294%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2015-05294info:eu-repo/grantAgreement/EC//653782
oai:bib-pubdb1.desy.de:2913292019-11-15T21:28:03Zec_fundedresourcesVDBopenaireengFalcioni, GiulioThe infrared structure of gauge theory amplitudesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionHiggsTools First Annual Meeting, Freiburg, Germany, 2015-04-14 - 2015-04-172015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/291329https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05330%22Researchersinfo:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2913332019-11-15T21:28:04Zec_fundedresourcesVDBopenaireengFalcioni, GiulioHiggstools Midterm Review, report of ESR10info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionHiggsTools Mid Term Review, Brussels, Belgium, 2015-10-20 - 2015-10-202015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/291333https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05334%22Researchersinfo:eu-repo/grantAgreement/EC//316704
oai:bib-pubdb1.desy.de:2914592025-07-17T08:53:44Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengAlioli, SimoneBauer, Christian W.Berggren, CalvinTackmann, FrankWalsh, Jonathan R.Drell-Yan production at NNLL ′ + NNLO matched to parton showersinfo:eu-repo/classification/ddc/530parton: showersDrell-Yan processp p --> lepton leptonhigher-order: 2resummationnumerical calculations: Monte Carlointerpretation of experiments: LHC-Binterpretation of experiments: ATLASinterpretation of experiments: CMSCERN LHC Coll7000 GeV-cmsWe present results for Drell-Yan production from the geneva Monte-Carlo framework. We combine the fully differential next-to-next-to leading order (NNLO) calculation with higher-order resummation in the 0-jettiness resolution variable. The resulting parton-level events are further combined with parton showering and hadronization provided by pythia8. The 0-jettiness resummation is carried out to NNLL′, which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, inclusive observables are correct to NNLO, up to small power corrections in the resolution cutoff. Furthermore, the perturbative accuracy of zero-jet-like resummation variables is significantly improved beyond the parton shower approximation. We provide comparisons with LHC measurements of Drell-Yan production at 7 TeV from ATLAS, CMS, and LHCb. As already observed in e$^+$e$^−$ collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of αs(MZ)=0.1135.Physical review / D 92(9), 094020 (2015). doi:10.1103/PhysRevD.92.094020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSoc.2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/291459https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05431%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/issn/1550-2368info:eu-repo/semantics/altIdentifier/wos/WOS:000364999600002info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.92.094020info:eu-repo/semantics/altIdentifier/issn/0556-2821info:eu-repo/semantics/altIdentifier/issn/1089-4918info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1508.01475info:eu-repo/grantAgreement/EC//600377
oai:bib-pubdb1.desy.de:2914602025-07-17T08:54:01Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengBonvini, MarcoPapanastasiou, AndrewTackmann, Frank J.Resummation and matching of b-quark mass effects in bbH productioninfo:eu-repo/classification/ddc/530We use a systematic effective field theory setup to derive the $b\bar{b}H$ production cross section. Our result combines the merits of both fixed 4-flavor and 5-flavor schemes. It contains the full 4-flavor result, including the exact dependence on the $b$-quark mass, and improves it with a resummation of collinear logarithms of $m_b/m_H$. In the massless limit, it corresponds to a reorganized 5-flavor result. While we focus on $b\bar{b}H$ production, our method applies to generic heavy-quark initiated processes at hadron colliders. Our setup resembles the variable flavor number schemes known from heavy-flavor production in deep-inelastic scattering, but also differs in some key aspects. Most importantly, the effective $b$-quark PDF appears as part of the perturbative expansion of the final result where it effectively counts as an $O(\alpha_s)$ object. The transition between the fixed-order (4-flavor) and resummation (5-flavor) regimes is governed by the low matching scale at which the $b$-quark is integrated out. Varying this scale provides a systematic way to assess the perturbative uncertainties associated with the resummation and matching procedure and reduces by going to higher orders. We discuss the practical implementation and present numerical results for the $b\bar{b}H$ production cross section at NLO+NLL. We also provide a comparison to the corresponding predictions in the fixed 4-flavor and 5-flavor results and the Santander matching prescription. Compared to the latter, we find a slightly reduced uncertainty and a larger central value, with its central value lying at the lower edge of our uncertainty band.Journal of high energy physics 2015(11), 196 (2015). doi:10.1007/JHEP11(2015)196info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionSpringer2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/291460https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05432%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1508.03288info:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP11(2015)196info:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/wos/WOS:000365811800003info:eu-repo/grantAgreement/EC//335260
oai:bib-pubdb1.desy.de:2917112025-07-30T09:36:59ZdnbdeliverydriverVDBopen_accessopenaireoai:bib-pubdb1.desy.de:2917342025-07-30T09:36:58Zec_fundedresourcesVDBopenaireengShablonin, E.Popov, A. I.Lushchik, A.Kotlov, A.Dolgov, S.Excitation of different chromium centres by synchrotron radiation in MgO:Cr single crystalsinfo:eu-repo/classification/ddc/530The excitation spectra for the emissions of chromium-containing centres have been measured at 10 K using synchrotron radiation of 4–32 eV in MgO single crystals with different content of Cr$^{3+}$ (5–850 ppm) and Ca$^{2+}$ impurity ions. Both virgin crystals and the samples preliminarily irradiated with x-rays at 295 K have been studied. The role of complex chromium centres containing two Cr$^{3+}$ and a cation vacancy (sometimes nearby a Ca$^{2+}$ ion) on the luminescence processes and the transformation/creation of structural defects has been analysed. Such anharmonic complex centres could serve as the seeds for the creation of 3D defects that facilitate the cracking and brittle destruction of MgO crystals under their irradiation with ∼GeV heavy ions providing extremely high excitation density within cylindrical ion tracks.Physica / B 477, 133 - 136 (2015). doi:10.1016/j.physb.2015.08.032info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionElsevier2015info:eu-repo/semantics/closedAccessDEhttps://bib-pubdb1.desy.de/record/291734https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05550%22Researchersinfo:eu-repo/semantics/altIdentifier/issn/1873-2135info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physb.2015.08.032info:eu-repo/semantics/altIdentifier/issn/0921-4526info:eu-repo/semantics/altIdentifier/wos/WOS:000362953700022info:eu-repo/grantAgreement/EC//226716
oai:bib-pubdb1.desy.de:2918042021-11-10T12:26:48Zdnbdeliveryec_fundedresourcesVDBdriveropen_accessopenaireengDöbrich, BabetteJaeckel, JoergKahlhoefer, FelixRingwald, AndreasSchmidt-Hoberg, KaiALPtraum: ALP production in proton beam dump experimentsWith their high beam energy and intensity, existing and near-future proton beam dumps provide an excellent opportunity to search for new very weakly coupled particles in the MeV to GeV mass range. One particularly interesting example is a so-called axion-like particle (ALP), i.e. a pseudoscalar coupled to two photons. The challenge in proton beam dumps is to reliably calculate the production of the new particles from the interactions of two composite objects, the proton and the target atoms. In this work we argue that Primakoff production of ALPs proceeds in a momentum range where production rates and angular distributions can be determined to sufficient precision using simple electromagnetic form factors. Reanalysing past proton beam dump experiments for this production channel, we derive novel constraints on the parameter space for ALPs. We show that the NA62 experiment at CERN could probe unexplored parameter space by running in dump mode for a few days and discuss opportunities for future experiments such as SHiP.info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersion2015info:eu-repo/semantics/openAccessDEhttps://bib-pubdb1.desy.de/record/291804https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2015-05619%22Researchersinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1512.03069info:eu-repo/grantAgreement/EC//638528
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