# Books

 2019-09-1614:35 [PUBDB-2019-03351] Book/Report/Dissertation / PhD Thesis Drescher, M. Parametric Waveform Synthesis [DESY-THESIS-2019-021] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 172 pp. (2019) [10.3204/PUBDB-2019-03351] = Dissertation, Universität Hamburg, 2019   The coherent synthesis of pulses from Optical Parametric Amplifiers (OPAs) offers the possibility to realize field-controlled electromagnetic waveforms with sub-cycle durations, widely scalable in energy and spectral bandwidth.Here we demonstrate a fully functional prototype of a mJ-level two channel parametric waveform synthesizer, which is ready to be upgraded to three channels. The synthesized field, whose bandwidth covers more than 2 octaves, from ~500 nm to ~2200 nm, can be compressed to a non-sinusoidal sub-cycle waveform close to the transform-limit.The long term stable operation of such a complex laser source is achieved, for the first time, by means of a sophisticated optical and mechanical design of the whole OPA system, along with targeted improvements made to the commercial pump laser.A new seeding scheme based on multiple supercontinua, further scalable to the mid-IR, leads to excellent phase stability among the different OPA channels and to a simplified dispersion management scheme.A detailed study, both theoretical and experimental, of the couplings among different pulse parameters during the parametric amplification, unveiled novel details of the Carrier-Envelope-Phase (CEP) stabilization process via OPA, and guided the design of the CEP-controlled seeding front-end.A simplified two-dimensional spectral shearing interferometry setup, where the ancillary pulses are obtained by spectral filtering the pump pulses, has been developed to easily characterize the spectral phase of the ultrabroadband pulses from each channel, overcoming the limitation of second-harmonic-based methods.Furthermore, ad-hoc nonlinear optical techniques have been deployed to observe the most relevant synthesis parameters such as the CEP of the seeding pulses and the relative phase among the different channels outputs. [...] OpenAccess: desy-thesis-19-021.title - PDF PDF (PDFA); PhD_thesis_GMR_Published - PDF PDF (PDFA); 2019-08-2217:04 [PUBDB-2019-03086] Book/Report/Dissertation / PhD Thesis Gallo-Voss, E. Search for supersymmetry with tau leptons in the CMS experiment [DESY-THESIS-2019-020] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 205 pp. (2019) [10.3204/PUBDB-2019-03086] = Dissertation, Universität Hamburg, 2019   This thesis is focused on the search for pair production of the supersymmetric $\tau$ lepton partners within the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). The search is performed using the data collected at a center-of-mass-energy $\sqrt{s} = 13$ TeV with the CMS detector in the years 2016-2017.One of the most popular extensions of the Standard Model (SM) is supersymmetry (SUSY). [...] OpenAccess: desy-thesis-19-020.title - PDF PDF (PDFA); Thesis_babounikau - 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. [...] Restricted: 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); 2019-07-2913:31 [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 $\Delta\phi_{12}$ between the jets with the largest transverse momenta $(p_T)$ in multi-jet event topologies. The measurements are based on proton-proton collision data at the center-of-mass energy of 13 TeV recorded by the Compact Muon Solenoid (CMS) experiment in 2016, and correspond to an integrated luminosity of 35.9 fb$^{−1}$ [...] 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 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$^{-1}$ . [...] OpenAccess: PhD_Thesis_Svenja_Pflitsch - PDF PDF (PDFA); desy-thesis-19-014.title - PDF PDF (PDFA); 2019-07-0414:41 [PUBDB-2019-02649] Book/Report/Dissertation / PhD Thesis Zagermann, M. On accelerated expansion in string theory [DESY-THESIS-2019-012] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 211 pp. (2019) [10.3204/PUBDB-2019-02649] = Dissertation, Universität Hamburg, 2019   In the first part of this thesis we investigate the viability of a class of models for de Sitter (dS) vacua in string theory, due to Kachru, Kallosh, Linde and Trivedi (KKLT). We start by explaining why the success or failure of such models is sensitive to a large number of Planck suppressed operators, and collect circumstantial evidence that this UV sensitivity cannot be evaded with delicately engineered models such as the Kallosh-Linde (KL) racetrack due to a generic conflict with the weak gravity conjecture (WGC) for axions. [...] OpenAccess: desy-thesis-19-012.title - PDF PDF (PDFA); thesis - PDF PDF (PDFA); 2019-06-2615:58 [PUBDB-2019-02598] Book/Report/Dissertation / PhD Thesis Gallo-Voss, E. Measurement of the coupling strength of the Higgs boson to $\tau$ leptons with the CMS experiment at the LHC [DESY-THESIS-2019-011] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 220 pp. (2019) [10.3204/PUBDB-2019-02598] = Dissertation, Universität Hamburg, 2019   This thesis presents the measurement of the coupling strength of the 125 GeV Higgsboson toτleptons. The measurement is performed on proton-proton collision data at acentre-of-mass energy of 13 TeV, collected by the CMS experiment at the LHC in the year2016, and corresponding to an integrated luminosity of 35.9 fb−1. [...] OpenAccess: desy-thesis-19-011.title - PDF PDF (PDFA); main_VBotta_A - PDF; 2019-05-2314:17 [PUBDB-2019-02359] Book/Report/Master Thesis Steder, L. Systematic Studies of a Cavity Quench Localization System [DESY-THESIS-2019-010] Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 120 pp. (2019) [10.3204/PUBDB-2019-02359] = Masterarbeit, Universität Hamburg, 2019   Several tools for quench localization at Superconducting Radio Frequency cavities exist. One of these techniques uses the excitation of temperature waves in liquid Helium below the lambda point. [...] OpenAccess: MasterThesis_B_Bein - PDF PDF (PDFA); desy-thesis-19-010.title - PDF PDF (PDFA); 2019-05-1314:25 [PUBDB-2019-02237] Book Flegel, I. Accelerators 2018: highlights and annual report Hamburg : DESY 71 pp. (2019) [10.3204/PUBDB-2019-02237]   OpenAccess: PDF PDF (PDFA);