# Ph.D. Theses

 2019-08-1415:24 [PUBDB-2019-03013] Book/Report/Dissertation / PhD Thesis Moortgat-Pick, G. From the Machine-Detector Interface to Electroweak Precision Measurements at the ILC — Beam-Gas Background, Beam Polarization and Triple Gauge Couplings [DESY-THESIS-2019-018] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 330 pp. (2019) [10.3204/PUBDB-2019-03013] = Dissertation, Univeristy of Hamburg, 2019   The International Linear Collider (ILC) is a planned electron-positron collider with a first stage at a center-of-mass energy of 250 GeV. The electron beam will be polarized to 80% and the positron beam to 30%. [...] OpenAccess: desy-thesis-19-018.title - PDF PDF (PDFA); ThesisRobertKarl - PDF PDF (PDFA); 2019-08-1413:31 [PUBDB-2019-03011] Book/Report/Dissertation / PhD Thesis Foster, B. Electron-beam diagnostics for a laser-driven plasma wakefield accelerator in the framework of FLASHForward [DESY-THESIS-2019-015] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 139 pp. (2019) [10.3204/PUBDB-2019-03011] = Dissertation, Universität Hamburg, 2018   Plasma wakefields are a promising approach for the acceleration of electrons with ultrahigh (10 to 100 GV/m) electric fields. Nowadays, high-intensity laser pulses are routinely utilized to excite these large-amplitude plasma waves. [...] OpenAccess: desy-thesis-19-015.title - PDF PDF (PDFA); Thesis_Schwinkendorf - PDF; 2019-08-1320:50 [PUBDB-2019-03009] Book/Report/Dissertation / PhD Thesis Moch, S.-O. High-precision computation of observables in supersymmetric Yang–Mills theory [DESY-THESIS-2019-019] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 149 pp. (2019) [10.3204/PUBDB-2019-03009] = Dissertation, Universität Hamburg, 2019   In this thesis we discuss modern mathematical tools for the perturbative analysis of supersymmetric Yang–Mills theories (abbreviated SYM). We apply contemporary and traditional computational techniques to two kind of problems. [...] OpenAccess: desy-thesis-19-019.title - PDF PDF (PDFA); thesis - PDF PDF (PDFA); 2019-08-1311:36 [PUBDB-2019-02996] Dissertation / PhD Thesis Burgmeier, A. Position Resolution and Upgradeof the CMS Pixel Detector andSearch for the Higgs Boson in the $\tau^+ \tau^-$ Final State 2015 pp. (2014) [10.3204/PUBDB-2019-02996] = Dissertation, Karlsruhe Institute of Technology, 2014   OpenAccess: PDF PDF (PDFA); 2019-08-1311:17 [PUBDB-2019-02995] Dissertation / PhD Thesis Schleper, P. Search for SUSY in Same-Sign Di-LeptonEvents with the CMS Detector 160 pp. (2012) [10.3204/PUBDB-2019-02995] = Dissertation, Hamburg University, 2012   In this thesis a search for new physics is presented, based on events with two isolated same sign leptons (muons and electrons), jets, and missing transverse energy. The analyzed data corresponds to an integrated luminosity of 1.1 fb$^{-1}$ and is collected with the CMSdetector in proton-proton collisions at the LHC with a center-of-mass energy of 7TeV. [...] OpenAccess: PDF PDF (PDFA); 2019-08-1311:11 [PUBDB-2019-02993] Dissertation / PhD Thesis Jung, H. Higher Order QCD Radiation in Top Pair Production with the CMS Detector 142 pp. (2009) [10.3204/PUBDB-2019-02993] = Dissertation, Hamburg University, 2009   The Large Hadron Collider at CERN will collide protons with a centre-of-massenergy of up to $√_s =$ 14TeV, thereby offering the opportunity to explore a widerange of physics topics.In this thesis the effects of QCD radiation in top pair events are examined.Due to the large top mass, top pairs are well suited for an investigation of gluonemissions. An extensive study comparing different radiation models implementedin Monte Carlo event generators is presented [...] OpenAccess: PDF PDF (PDFA); 2019-08-0215:17 [PUBDB-2019-02902] Book/Report/Dissertation / PhD Thesis et al Ultrafast Nuclear Dynamics Induced by Light from the XUV to the THz Range [DESY-THESIS-2019-017] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 79 pp. (2019) [10.3204/PUBDB-2019-02902] = Dissertation, Universität Hamburg, 2019   With recent advances in the generation of ultrashort laser pulses, electron and nuclear dynamics in molecules can be investigated on their natural, atto- to femtosecond timescale. This opens up the investigation of many interesting phenomena, including primary events in chemistry and biology. [...] OpenAccess: Thesis_CArnold_Defended_Print_fixed - PDF PDF (PDFA); desy-thesis-19-017.title - PDF PDF (PDFA); 2019-08-0114:39 [PUBDB-2019-02888] Dissertation / PhD Thesis Kärtner, F. Sub-Cycle Light Field Synthesizer for Attosecond Science 190 pp. (2018) [10.3204/PUBDB-2019-02888] = Dissertation, University of Hamburg, 2019   The generation of energetic laser pulses with durations below one optical cycle is one of the current frontiers of ultrafast optics. Such sources attract enormous attention due to the implications they hold for studying extreme light-matter interactions and to harness attosecond pulse production via high harmonic generation (HHG). [...] OpenAccess: desy-thesis-19-016.title - PDF PDF (PDFA); PhD Thesis Volltext - PDF PDF (PDFA); 2019-07-2913:31 [PUBDB-2019-02858] Book/Report/Dissertation / PhD Thesis Gallo-Voss, E. Measurement and phenomenology of azimuthal correlations in high transverse momentum multi-jet topologies in CMS at the center-of-mass energy of 13 TeV [DESY-THESIS-2019-013] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 287 pp. (2019) [10.3204/PUBDB-2019-02858] = Dissertation, Universität Hamburg, 2019   This work addresses the measurements and phenomenology of the azimuthal separation ∆φ12 between the jets with the largest transverse momenta (pT) in multi-jet event topolo-gies. The measurements are based on proton-proton collision data at the center-of-massenergy of 13 TeV recorded by the Compact Muon Solenoid (CMS) experiment in 2016, and correspond to an integrated luminosity of35.9fb−1. [...] OpenAccess: desy-thesis-19-013.title - PDF PDF (PDFA); Thesis_PhD_armando_bermudez_martinez - PDF PDF (PDFA); 2019-07-2911:40 [PUBDB-2019-02856] Book/Report/Dissertation / PhD Thesis Moch, S.-O. Associated Production of W + Charm in 13 TeV Proton-Proton Collisions Measured with CMS and Determination of the Strange Quark Content of the Proton [DESY-THESIS-2019-014] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 178 pp. (2019) [10.3204/PUBDB-2019-02856] = Dissertation, Universität Hamburg, 2019   This thesis presents the measurement of of associated production of a W ± boson and a charm quark (W + c) in proton-proton collisions at a center-of-mass energy of 13 TeV.The data used in this analysis has been recorded by the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 35.7 fb^-1 . The W^± bosons arereconstructed by the presence of a muon and a neutrino, with the latter indicated by the missing transverse momentum in an event. [...] OpenAccess: PhD_Thesis_Svenja_Pflitsch - PDF PDF (PDFA); desy-thesis-19-014.title - PDF PDF (PDFA);