# Publications database

 2018-01-1913:34 [PUBDB-2018-00697] Report/Journal Article et al The two-mass contribution to the three-loop pure singlet operator matrix element [DESY-17-195; DO-TH-17-32; arXiv:1711.06717] Nuclear physics / B 927, 339 - 367 (2018) [10.1016/j.nuclphysb.2017.12.018]   We present the two-mass QCD contributions to the pure singlet operator matrix element at three loop order in x-space. These terms are relevant for calculating the structure function $F_2(x,Q^2)$ at $O(\alpha_s^3)$ as well as for the matching relations in the variable flavor number scheme and the heavy quark distribution functions at the same order. [...] Restricted: PDF PDF (PDFA); 2018-01-1816:15 [PUBDB-2018-00694] Preprint/Report Konstandin, T. Resummation of Goldstone Infrared Divergences: A Proof to All Orders [DESY-17-226; arXiv:1712.08068]   The perturbative effective potential calculated in Landau gauge suffers from infrared problems due to Goldstone boson loops. These divergences are spurious and can be removed by a resummation procedure that amounts to a shift of the mass of soft Goldstones. [...] OpenAccess: PDF PDF (PDFA); 2018-01-1815:05 [PUBDB-2018-00693] Conference Presentation Kärtner, F. Integrated Photonics to the Rescue of Femtosecond Beam Diagnostics International Beam Instrumentation Conference, IBIC 17, Meeting locationGrand Rapids, Michigan, USA, 20 Aug 2017 - 24 Aug 2017   Beam instrumentation has always been using results from neighbouring communities. Over the last 10 years, a number of beam instruments and systems have successfullyadopted optical solutions, pushing performances from ps to fs, exploiting optical set-ups or photonic components. [...] OpenAccess: PDF PDF (PDFA); 2018-01-1812:04 [PUBDB-2018-00689] Dissertation / PhD Thesis Naranjo Garcia, R. Measurements of top-quark properties at 8 TeV using the ATLAS detector at the LHC 229 pp. (2017) [10.3204/PUBDB-2018-00689] = Dissertation, Bergische Universität Wuppertal, 2017   This work presents the measurements of the charge asymmetry and top quark spin observables in ttbar events based on 20.3 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV proton--proton collisions recorded with the ATLAS detector at the LHC. These analyses are performed in the dilepton final state, characterized by the presence of two isolated leptons (electrons or muons). [...] OpenAccess: PDF; 2018-01-1811:34 [PUBDB-2018-00686] Contribution to a conference proceedings/Contribution to a book et al Material Tests for the ILC Positron Source 8th International Particle Accelerator Conference, IPAC 2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 2017 Geneva : JACoW, 1293-1295 (2017) [10.3204/PUBDB-2018-00686]   The positron source is a vital system of the ILC. The conversion target that yields about 10$^{14}$ positrons per second will undergo high peak and cyclic load during ILC operation. [...] OpenAccess: PDF; 2018-01-1811:22 [PUBDB-2018-00685] Journal Article/Contribution to a conference proceedings Jung, H. Quark and Gluon iTMD parton distributions from HERA DIS data 38th International Conference on High Energy Physics, ICHEP2016, Meeting locationChicago, USA, 3 Aug 2016 - 10 Aug 2016 Proceedings of Science (ICHEP2016), 961 (2016) [10.3204/PUBDB-2018-00685]   We describe a new approach to solve coupled quark and gluon DGLAP evolution equations with a Monte Carlo method. We show that this method is equivalent to other semi-analytical methods [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-01-1810:49 [PUBDB-2018-00684] Journal Article et al High-strength Mg-6Zn-1Y-1Ca (wt%) alloy containing quasicrystalline I-phase processed by a powder metallurgy route Materials science and engineering / A 715, 92 - 100 (2018) [10.1016/j.msea.2017.12.111]   A high-strength Mg-6Zn-1Y-1Ca (wt%) alloy has been processed by a powder metallurgy route. Rapidly solidifiedpowders with a particle size below 100 μm were used as a way for preventing formation of ternaryMgZnCa compounds during subsequent extrusion at 250 °C. [...] Restricted: PDF PDF (PDFA); 2018-01-1716:46 [PUBDB-2018-00682] Contribution to a conference proceedings/Contribution to a book Beutner, B. Fast Image Analysis for Beam Profile Measurement at the European XFEL 16th International Conference on Accelerator and Large Experimental Control Systems, ICALEPCS2017, Meeting locationBarcelona, Spain, 8 Oct 2017 - 13 Jan 2018 JACoW, 4 pp. (2017) [10.3204/PUBDB-2018-00682]   At the European XFEL, images of scintillator screens are processed at a rate of 10 Hz. Dedicated image analysis servers are used for transversal beam profile analysis as well as for longitudinal profile and slice emittance measurement [...] OpenAccess: PDF PDF (PDFA); 2018-01-1716:42 [PUBDB-2018-00680] Contribution to a conference proceedings/Contribution to a book Hensler, O. RF-Energy Management for the European XFEL 16th International Conference on Accelerator and Large Experimental Control Systems, ICALEPCS2017, Meeting locationBarcelona, Spain, 8 Oct 2017 - 13 Oct 2017 JACoW, 3 pp. (2017) [10.3204/PUBDB-2018-00680]   The European XFEL is in its commissioning phase at this time. One of the major tasks is to bring up all the 25 installed RF-stations, which will allow for a beam energy of up to 17.5 GeV [...] OpenAccess: PDF PDF (PDFA); 2018-01-1716:39 [PUBDB-2018-00679] Contribution to a conference proceedings/Contribution to a book Aytac, S. Using Color Blindness Simulator During User Interface Development for Accelerator Control Room Applications 16th International Conference on Accelerator and Large Experimental Control Systems ICALEPCS 2017, ICALEPCS2017, Meeting locationBarcelona, Spain, 8 Oct 2017 - 13 Oct 2017 JACoW, 6 pp. (2017) [10.3204/PUBDB-2018-00679]   For normally sighted developers it is hard to imagine how the user interface is going to look to a color blind person. Our purpose is to draw attention to people with color blindness and to consider their color vision [...] OpenAccess: PDF PDF (PDFA);