# Publications database

 2017-08-1509:47 [PUBDB-2017-09253] Book/Report/Dissertation / PhD Thesis Louis, J. Aspects of Six-Dimensional Flux Compactifications [DESY-THESIS-2017-036] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 141 pp. (2017) [10.3204/PUBDB-2017-09253] = Universität Hamburg, Diss., 2017   In this thesis we investigate various aspects of ux compactications in six-dimensionalquantum eld theories. After introducing the internal geometries, i.e. [...] OpenAccess: PhD_Thesis_Markus_Dierigl_Pub - PDF PDF (PDFA); desy-thesis-17-036.title - PDF PDF (PDFA); 2017-08-1113:51 [PUBDB-2017-09190] Book/Report/Dissertation / PhD Thesis Wichmann, K. Search for contact interactions and finite quark radius using combined $e^{\pm}p$ data at HERA [DESY-THESIS-2017-035] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 163 pp. (2017) [10.3204/PUBDB-2017-09190] = Universität Hamburg, Diss., 2017   A combination is presented of all previously published deep inelastic neutral and charged current $e^{\pm}p$ scattering measurements at HERA for zero beam polarisation.The ZEUS and H1 collaborations have collected data at electron beam energy of $27.5$ GeV and proton beam energies of $920$, $820$, $575$ and $460$ GeV.The combined data correspond to an integrated luminosity of about $1$ fb$^{-1}$ and cover a kinematic range in the negative four-momentum-transfer squared from $Q^{2} = 0.045$ GeV$^{2}$ to $Q^{2} = 50000$ GeV$^{2}$ and in Bjorken $x$ from $x_{\rm Bj} = 6 \times 10^{-7}$ to $x_{\rm Bj} = 0.65$.The correlations of systematic uncertainties between different sets of data were taken into account, resulting in significantly improved precision.The combined $e^{\pm}p$ cross sections were used in a QCD analysis at next-to-leading order, providing a set of parton distribution functions, called ZCIPDF.The combined measurements were also used in an analysis beyond the Standard Model using a new approach, performing simultaneous fits on large sets of Monte Carlo replicas of parton distribution functions, PDFs, together with the parameters of "new physics" processes.A simplified approach to reduce the calculation time was developed and extensively tested.It allowed the calculation time to be reduced by about a factor of 50.The resulting $95\,\%$ C.L. upper limit on the effective quark radius is $0.43 \cdot 10^{-16}$ cm and the limits on the mass scales for different contact interaction scenarios extend up to $10$ TeV.The analyses have shown that taking into account the possible influence of processes beyond the Standard Model on the PDF parameters is necessary, since the limits that would be obtained using PDFs from QCD analysis within the Standard Model are too strong by about $10\,\%$.Studies of the surface quality of 28 Niobium superconducting radio frequency, SRF, cavities and development of a controllable cooling system for Niobium samples are also reported.The SRF cavities are the core of the accelerating technology for the future International Linear Collider, ILC; the reported studies are part of an ongoing research and development program.. OpenAccess: desy-thesis-17-035.title - PDF PDF (PDFA); Turkot_PhD_Thesis_Search_for_CI_at_HERA - PDF; 2017-08-0911:51 [PUBDB-2017-08991] Book Zech, G. Einführung in Statistik und Messwertanalyse für Physiker : Ergänzungen Hamburg : Verlag Deutsches Elektronen-Synchrotron, 66 pp. (2017) [10.3204/PUBDB-2017-08991]   OpenAccess: PDF PDF (PDFA); 2017-08-0911:19 [PUBDB-2017-08987] Book Zech, G. Introduction to Statistics and Data Analysis for Physicists; 3rd revised Hamburg : Verlag Deutsches Elektronen-Synchrotron, 488 pp. (2017) [10.3204/PUBDB-2017-08987]   OpenAccess: PDF PDF (PDFA); 2017-08-0816:03 [PUBDB-2017-08954] Report/Journal Article Winter, W. Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays [arXiv:1607.07989] Scientific reports 7(1), 4882 (2017) [10.1038/s41598-017-05120-7]   The determination of the injection composition of cosmic ray nuclei within astrophysical sources requires sufficiently accurate descriptions of the source physics and the propagation – apart from controlling astrophysical uncertainties. We therefore study the implications of nuclear data and models for cosmic ray astrophysics, which involves the photo-disintegration of nuclei up to iron in astrophysical environments. [...] OpenAccess: PDF PDF (PDFA); 2017-08-0815:55 [PUBDB-2017-08952] Report/Journal Article Winter, W. High energy neutrinos from the tidal disruption of stars [arXiv:1612.03160] Physical review / D 95(12), 123001 (2017) [10.1103/PhysRevD.95.123001]   We study the production of high energy neutrinos in jets from the tidal disruption of stars by supermassive black holes. The diffuse neutrino flux expected from these tidal disruption events (TDEs) is calculated both analytically and numerically, taking into account the dependence of the rate of TDEs on the redshift and black hole mass. [...] OpenAccess: PDF PDF (PDFA); 2017-08-0815:49 [PUBDB-2017-08950] Report/Journal Article et al Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory [arXiv:1612.07155 , FERMILAB-PUB-16-618] Journal of cosmology and astroparticle physics 2017(04), 038 - 038 (2017) [10.1088/1475-7516/2017/04/038]   We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5⋅1018 eV, i.e.~the region of the all-particle spectrum above the so-called "ankle" feature. [...] Restricted: PDF PDF (PDFA); 2017-08-0815:40 [PUBDB-2017-08947] Journal Article/Report/Contribution to a conference proceedings Boncioli, D. Interactions of Cosmic Rays around the Universe. Models for UHECR data interpretation [arXiv:1705.04077] XLVI International Symposium on Multiparticle Dynamics, ISMD 2016, Meeting locationJeju Island, South Korea, 29 Aug 2016 - 2 Sep 2016   Ultra high energy cosmic rays (UHECRs) are expected to be accelerated inastrophysical sources and to travel through extragalactic space before hitting the Earth atmosphere.They interact both with the environment in the source and with the intergalacticphoton fields they encounter, causing different processes at various scales dependingon the photon energy in the nucleus rest frame. UHECR interactions are sensitive touncertainties in the extragalactic background spectrum and in the photo-disintegrationmodels.. OpenAccess: PDF PDF (PDFA); 2017-08-0815:30 [PUBDB-2017-08942] Contribution to a conference proceedings/Contribution to a book et al Ellipticity Dependence of Higher-order Harmonics in Solids: Unraveling the Coupled Intraband and Interband Dynamics CLEO: Applications and Technology in Proceedings Conference on Lasers and Electro-OpticsConference on Lasers and Electro-Optics, CLEO 2017, Meeting locationSan Jose, California, California, 14 May 2017 - 19 May 2017 Washington D.C. : OSA, JTh5B (2017) [10.1364/CLEO_AT.2017.JTh5B.10] special issue: "CLEO: QELS_Fundamental Science 2017"   The various higher-harmonic orders generated in solids exhibit qualitatively different sensitivity to driver-pulse ellipticity, resulting from a different response of intraband and interbanddynamics. Non-zero driver-pulse ellipticity permits harmonic cutoff extension and circularly polarized higher-harmonics.. Restricted: PDF PDF (PDFA); 2017-08-0815:22 [PUBDB-2017-08938] Contribution to a conference proceedings/Contribution to a book et al Narrowband Terahertz Generation with Broadband Chirped Pulse Trains in Periodically Poled Lithium Niobate CLEO: QELS_Fundamental Science in Proceedings Conference on Lasers and Electro-OpticsConference on Lasers and Electro-Optics, CLEO 2017, Meeting locationSan Jose, California, USA, 14 May 2017 - 19 May 2017 Washington, D.C. : OSA, FW4D (2017) [10.1364/CLEO_QELS.2017.FW4D.4] special issue: "CLEO: QELS_Fundamental Science 2017"   We generate narrowband terahertz radiation in periodically poled lithium niobate crystals using a train of chirped-and-delayed pulses from a broadband high energy Ti:sapphire laser. We achieve a multi-cycle THz energy of 40 mJ at 0.544 THz.. Restricted: 4.PDF;