PPTX ODP PDF PPT; OpenAccess: PDF PDF (PDFA); URL: https://library.desy.de/publicationsdesy/theses/2024/@@siteview
.
Breadcrumb Navigation
DISSERTATIONEN - MASTERARBEITEN - BACHELORARBEITEN 2024
[PUBDB-2024-01520]
Dissertation / PhD Thesis
4D transverse and 2D longitudinal phase space characterization of high brightness electron beams at PITZ
Hamburg : University of Hamburg 177 pp. (2024) [10.3204/PUBDB-2024-01520] = Dissertation, University of Hamburg, 2024
In the scope of this thesis work, the existing diagnostic setups for the transverseand longitudinal phase space characterization at the Photo Injector Test facility atDESY in Zeuthen (PITZ) have been utilized to obtain detailed and reliable results.PITZ, being a test facility for European XFEL and FLASH, needs to do detailedcharacterization of electron beams to ensure that they meet the requirements ofthe FELs, i.e., small transverse emittance and energy spread as well as high peakcurrent.For the reconstruction of the horizontal and vertical phase spaces, PITZ utilizes aslit scan technique as a standard tool because of its space charge dominated electronbeams. A novel method for 4 dimensional transverse phase space characterization,known as virtual pepper pot, is proposed that can give insight to the transversebeam phase space coupling. [...]
[PUBDB-2024-01253]
Dissertation / PhD Thesis
Plasma instabilities of TeV pair beams induced by blazars
Potsdam : Publication Server of the University of Potsdam 158 pp. (2024) [10.25932/PUBLISHUP-63013] = Dissertation, University of Potsdam, 2024
Relativistic pair beams produced in the cosmic voids by TeV gamma rays from blazars are expected to produce a detectable GeV-scale cascade emission missing in the observations. The suppression of this secondary cascade implies either the deflection of the pair beam by intergalactic magnetic fields (IGMFs) or an energy loss of the beam due to the electrostatic beam-plasma instability. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-06183]
Master Thesis
; Investigation of bunch-by-bunch position measurements at PETRA III
33 pp. (2024) = Masterarbeit, Université CAEN Normandie, 2024
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07897]
Dissertation / PhD Thesis
Structural and Functional Aspects of the Paradoxical ClpP Modulation by Peptidomimetic Boronate Compounds
156 pp. (2024) [10.3204/PUBDB-2024-07897] = Dissertation, University of Hamburg, 2024
The low availability of novel antibiotics and the spread of multi-resistant organismscreate a severe situation worldwide. Each year, many individuals perish ordevelop serious disabilities due to persistent infections that conventionalantimicrobial chemotherapies cannot treat. [...]
[PUBDB-2024-06066]
Dissertation / PhD Thesis
Zur Oxidphasenbildung in den frühen Oxidationsstadien von komplexen Co-Cr-Fe-Mn-Ni-(Cu, Si)-Legierungen
121 pp. (2024) [10.3204/PUBDB-2024-06066] = Dissertation, Friedrich-Schiller-Universität Jena, 2024
Ziel der vorliegenden Arbeit war es, einen Beitrag zum Einfluss von Legierungszusammensetzung und -komplexität auf frühe Oxidationsstadien von 3d-Übergangsmetall-CCAs zu leisten. Hierfür wurden insgesamt 11 verschiedene Legierungen aus den zwei grundlegenden Modellsystemen Co-Cr-Fe-Mn-Ni-Si (Co-System) und Co-Cr-Cu-Fe-Mn-Ni (Cu-System) erfolgreich hergestellt, thermomechanisch verarbeitet, oxidiert und detailliert untersucht [...]
[PUBDB-2024-07665]
Master Thesis
; ; ; et al Event Selection and Angular Reconstruction for W Boson Events at Future $e^+e^-$ Colliders
79 pp. (2024) = Masterarbeit, University of Coimbra, 2024
The international particle physics community has identified an e+e− Higgs factory as the highest-priority next collider. Such a facility would enable the production of a substantial number ofW bosons. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-01804]
Dissertation / PhD Thesis
Investigating molecules of astrochemical interest using rotational and infrared spectroscopy
200 pp. (2024) [10.3204/PUBDB-2024-01804] = Dissertation, Christian-Albrechts-Universität zu Kiel, 2024
The objective of this thesis is to investigate molecules of astronomical interest with a multi-spectroscopic approach to allow the chemical inventory of interstellar molecules to be better determined. This will also contribute towards a more comprehensive understanding of their formation mechanisms in the Interstellar medium. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-01713]
Book/Dissertation / PhD Thesis
Search for Higgs boson production in association with b-quarks in final states with leptons with machine learning techniques at CMS
[DESY-THESIS-2024-006]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 198 pp. (2024) [10.3204/PUBDB-2024-01713] = Dissertation, Universität Hamburg, 2024
One of the primary objectives of the CMS experiment is to measure the mechanisms of the Higgs boson production precisely and to determine its coupling structure. The Yukawa interaction is the mechanism via which the Higgs boson couples to fermions in the Standard Model. [...]
[PUBDB-2024-07838]
Dissertation / PhD Thesis
; Radiation damage studies of monolithic silicon sensors for particle and astro-particle physics applications
Berlin 205 pp. (2024) = Dissertation, Humboldt University, 2024
The development and characterization of new detector technologies is an important research path in order to facilitate future high energy and astroparticle physics experiments. For both the harsh radiation environment of modern collider experiments and the proton, electron and heavy ion rich environment in the outer earth orbit, the radiation hardness of modern detectors is one of their most important figures of merit. [...]
[PUBDB-2025-00197]
Dissertation / PhD Thesis
; ; Uncertainties in Generative Deep Learning and Data Amplification for High Energy Physics
Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky 1 - 180 (2024) = Dissertation, University of Hamburg, 2024
The upcoming high-luminosity upgrade of the LHC requires an increase in simulated data. Due to the high computational cost of detector simulation, this demand threatens to surpass the computational resources. [...]
External link: Fulltext
Fulltext
[PUBDB-2024-05894]
Bachelor Thesis
; ; Study of Kinematic Distributions in W Boson and D(*) Meson Production in pp Collisions
98 pp. (2024) = Bachelorarbeit, University of Hamburg, 2024
act The production of a Wboson in association with a charm quark is a valuable process to study the relatively unconstrained strange quark parton distribution function of the proton. This work presents an analysis of gluon splitting as an important but not well understood background process to W+c production. [...]
[PUBDB-2024-06572]
Dissertation / PhD Thesis
; ; Controlling two-electron systems in their excited state by an intense laser field: Strong-field ionization of atomic helium & Wave-packet manipulation in molecular hydrogen
Heidelberg University Library 196 pp. (2024) [10.11588/HEIDOK.00034342] = Dissertation, Universität Heidelberg, 2024
In this work fundamental light–matter interaction is studied in excited-state two-electron systems under the influence of an intense laser field in two respects: First, motivated by the results of a numerical simulation on the role of initial-state electron correlation for the ionization process, strong-field ionization out of selectively prepared doubly excited states (DESs) in helium is studied in a two-colour extreme ultraviolet (XUV)–infrared (IR) experiment using a reaction microscope (REMI). Detected recoil-ion and photoelectron momentum distributions help to identify a variety of different IR-induced ionization pathways for both single and double ionization out of different DESs as the initial state for strong-field interaction [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-08049]
Dissertation / PhD Thesis
; Mechanism of Fluorescence Recovery Protein (FRP) in Photoprotection Regulation in Cyanobacteria
1-104 (2024) = Dissertation, Federal Research Center Biotechnology RAS, 2024
The study investigates molecular mechanisms of FRP and its interaction with OCP in cyanobacteria, with applications in photoprotection and biotechnology..
[PUBDB-2025-00135]
Dissertation / PhD Thesis
; ; X-ray multiphoton ionization dynamics: Quantum-state-resolved calculations and machine-learning approach
Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky 1 - 155 (2024) = Dissertation, University of Hamburg, 2024
X-ray free-electron lasers (XFELs) offer unique opportunities for unraveling ultrafast dynamics in matter and for imaging biomolecules with almost atomic resolution. For these attractive applications of XFELs, deepening our understanding of the interaction of high-intensity X rays with individual atoms is essential. [...]
External link: Fulltext
Fulltext
[PUBDB-2024-06072]
Bachelor Thesis
; Asymmetrisch halogenierte 9,10-Dihydro-9,10-diboraanthracene: Synthese, Eigenschaften und Reaktivität
Frankfurt am Main 64 pp. (2024) = Bachelorarbeit, Johann Wolfgang Goethe-Universität in Frankfurt am Main, 2024
[PUBDB-2024-07449]
Dissertation / PhD Thesis
; ; ATLAS ITk Silicon Strip Detector Performance Studies based on the System Test with Cosmic Muons at DESY
Universitäts- und Landesbibliothek Bonn 176 pp. (2024) [10.48565/BONNDOC-421] = Dissertation, University of Bonn, 2024
The ATLAS experiment is the world’s largest collider-based particle physics experiment, located at the LHC in Geneva. An upgrade of the LHC will greatly increase the radiation environment and track density in the inner region of the detector. [...]
[PUBDB-2024-01900]
Book/Dissertation / PhD Thesis
First simultaneous measurement of single and pair production of top quarks in association with a Z boson at the LHC
[DESY-THESIS-2024-007]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 156 pp. (2024) [10.3204/PUBDB-2024-01900] = Dissertation, Universität Hamburg, 2024
In the years 2016–2018 the CMS Experiment at CERN’s Large Hadron Colliderrecorded a large amount of proton-proton collision data at a centre-of-mass energyof 13 TeV, corresponding to an integrated luminosity of 138 fb−1.With this large dataset, the associated production of top quarks with the Z bosonhas been measured precisely and differentially. In this thesis, for the first time,single and pair production of top quarks in association with a Z boson (tZq, tWZand ttZ) are measured simultaneously and differentially. [...]
[PUBDB-2024-04856]
Dissertation / PhD Thesis
; ; New insights in understanding the interaction between recrystallization and phase transformation during intercritical annealing in DP steels
194 pp. (2024) = Dissertation, Lorraine, 2024
The formation of microstructures is a crucial step for steelmakers. In the case of DP steels, used for automotive construction, this formation takes place during intercritical annealing after cold-rolling [...]
[PUBDB-2024-07415]
Dissertation / PhD Thesis
An interference search for new scalar and pseudoscalar states decaying to a top-anti-top quark pair with the ATLAS experiment
190 pp. (2024) [10.3204/PUBDB-2024-07415] = Dissertation, University of Hamburg, 2024
A search for heavy pseudoscalar (A) and scalar (H) Higgs bosons decaying into a top-quark pair ($t\bar{t}$) is presented. The search has been conducted using 140~fb$^{-1}$ of proton--proton collision data collected by the ATLAS experiment at the Large Hadron Collider (LHC), with a centre-of-mass energy of $\sqrt{s}=13$~TeV.The analysis accounts for interference effects between the signal process and Standard Model (SM) $t\bar{t}$ production. [...]
[PUBDB-2024-07671]
Dissertation / PhD Thesis
Extreme Timing Detectors for Particle Identification and Their Physics Application at Future Electron-Positron Colliders
Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky 172 pp. (2024) [10.3204/PUBDB-2024-07671] = Dissertation, University of Hamburg, 2024
Picosecond timing detectors, e.g. low gain avalanche diodes (LGADs), gained increasing attention in the context of future Higgs factory experiments due to their recent technological advancements. [...]
[PUBDB-2024-06718]
Dissertation / PhD Thesis
First Search for Heavy Neutral Leptons with IceCube DeepCore
Humboldt-Universität zu Berlin 117 pp. (2024) [10.18452/29182] = Dissertation, Humboldt-University Berlin, 2024
Die Beobachtung von Neutrino-Oszillationen hat gezeigt, dass Neutrinos eine von Null verschiedene Masse haben. Dieses Phänomen wird nicht durch das Standardmodell der Teilchenphysik beschrieben, aber eine mögliche Erklärung für dieses Dilemma ist die Existenz von schweren neutralen Leptonen in Form von rechtshändigen Neutrinos [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-06189]
Book/Dissertation / PhD Thesis
Catching Dark Photons in the Sky: Looking for light vector particles using satellites
[DESY-THESIS-2024-015]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 161 pp. (2024) [10.3204/PUBDB-2024-06189] = Dissertation, Universität Hamburg, 2024
The lack of signals in traditional dark matter (DM) searches beyond gravitational interactions provide an excellent reason to investigate weakly coupled and/or light dark sectors(DS). These receive motivation both from the theoretical and the phenomenological side with rich physics across many different scales. [...]
[PUBDB-2024-04874]
Bachelor Thesis
; ; Design and setup of a full-field microscope for semiconductor analysis
45 pp. (2024) = Bachelorarbeit, Universität Hamburg, 2024
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-01185]
Book/Dissertation / PhD Thesis
Advancements in Diffraction Analysis Methods and Data Reduction Techniques for Serial Crystallography
[DESY-THESIS-2024-004]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 249 pp. (2024) [10.3204/PUBDB-2024-01185] = Dissertation, Universität Hamburg, 2024
Proteins play a crucial role in living cells. Their functions are determined by their three-dimensional (3D) structure. [...]
OpenAccess: desy-thesis-24-004.title - PDF PDF (PDFA); Thesis_Galchenkova_PhD_applied_corrections - PDF PDF (PDFA);
PDF PDF (PDFA); Thesis_Galchenkova_PhD_applied_corrections - PDF PDF (PDFA);
[PUBDB-2024-04783]
Master Thesis
Impact of ocean-generated microseism on the European X-ray Free Electron Laser
51 pp. (2024) [10.3204/PUBDB-2024-04783] = Masterarbeit, Fachhochschule Wedel, 2024
In this thesis, it is shown that ocean-generated microseism significantly impacts the synchronisation performance of the European X-ray free-electron laser (XFEL), which is based on a high-energy linear accelerator. Using superconducting technology, it generates hard X-ray pulses at megahertz frequencies. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-01698]
Dissertation / PhD Thesis
Structural and biochemical studies of an Argonaute and its associated protein from Archaeoglobus fulgidus
220 pp. (2024) = Dissertation, Vilnius University, 2024
Argonaute (Ago) proteins can be found in all three domains of life –bacteria, archaea, and eukaryotes. The first-discovered and best-characterizedof these are the eukaryotic Argonaute proteins (eAgos)[1–3]. [...]
[PUBDB-2024-06768]
Book/Dissertation / PhD Thesis
Transverse momentum dependence in double parton scattering
[DESY-THESIS-2024-017]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 195 pp. (2024) [10.3204/PUBDB-2024-06768] = Dissertation, Universität Hamburg, 2024
Double parton scattering (DPS) is a mechanism in which two hard parton-levelprocesses take place in a single hadron-hadron collision. This can yield importantcontributions to search processes at the LHC, a prominent channel being like-sign leptonpair production via the production of two W bosons of equal charge in a double Drell-Yan process.The factorization theorems allow to write the DPDs cross-section in terms ofperturbatively computable hard scattering part, and non-perturbative objects calleddouble parton distributions (DPDs), which contain a lot of new information abouthadron structure at the quantum level, such as correlations between partons inpolarization, color, and momentum.In this thesis, we describe transverse-momentum dependence in the process ofproduction of two W bosons in proton-proton collision via double parton scattering.This requires so-called transverse momentum-dependent double parton distributions(DTMDs). [...]
[PUBDB-2024-04868]
Dissertation / PhD Thesis
; Structural studies of selected protein complexes involved in signal transduction
108 pp. (2024) = Dissertation, Charles University Prague, 2024
Protein-protein interactions are critical for most physiological andpathophysiological processes. Detailed characterization of these interactions is thereforeessential not only to understand the nature of these events, but also to design strategiesto target these interactions. [...]
[PUBDB-2024-06034]
Master Thesis
Dark Photon Searches at Future $e^+ e^-$ Colliders
61 pp. (2024) [10.3204/PUBDB-2024-06034] = Masterarbeit, Univeristy of Hamburg, 2023
The Dark Photon is a hypothetical particle that can be possibly detected in the experiment because of its kinetic mixing with the ordinary, visible photon. In theories where dark matter is explained by the existence of a ’dark sector’, interacting with the visible sector of the Standard Model via gravitation, the photon of the dark sector, the Dark Photon (A_D ), might be the only visible manifestation of the dark sector. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07360]
Dissertation / PhD Thesis
; ; ; et al From luminosity to cross-section measurements - Inclusive measurement of the $t\bar{t}$ cross-section using proton-proton collisions at $\sqrt{s}$ = 13.6 TeV with the ATLAS detector
189 pp. (2024) = Dissertation, Humboldt University, 2024
The inclusive t¯t cross-section measurement at a centre-of-mass of 13.6 TeV is presented using 29 fb−1 of data recorded by the ATLAS detector at the Large Hadron Collider in 2022. For a cross-section measurement it is necessary to count the events and measure the luminosity of the collider. [...]
Restricted: dissertation_huegli_cedrine - PDF PDF (PDFA); Hügli_CERN-THESIS-2024-170 - PDF PDF (PDFA);
PDF PDF (PDFA); Hügli_CERN-THESIS-2024-170 - PDF PDF (PDFA);
[PUBDB-2024-07610]
Book/Dissertation / PhD Thesis
Optimizing White-light Generation for an Optical Parametric Chirped Pulse Amplifier used as a Titanium-Sapphire Seed Laser
[DESY-THESIS-2024-019]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 181 pp. (2024) [10.3204/PUBDB-2024-07610] = Dissertation, Universität Hamburg, 2024
Compact high-brightness electron beam sources are advantageous for industrial, medicaland scientific applications. Laser-plasma acceleration has the potential to meet thisneed, as it can provide acceleration fields that are orders of magnitude higher than inclassical linear accelerators based on modern radio-frequency technology, allowing formuch smaller accelerators. [...]
[PUBDB-2024-05063]
Book/Dissertation / PhD Thesis
Generative Modelling in High-Energy Physics
[DESY-THESIS-2024-011]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 256 pp. (2024) [10.3204/PUBDB-2024-05063] = Dissertation, University of Hamburg, 2024
Monte Carlo simulations are an important tool in high-energy physics, e.g. to test the predictions of theory models or to infer a priori unknown parameters of the models. [...]
[PUBDB-2024-05585]
Dissertation / PhD Thesis
Synthese und Charakterisierung von Seltenerd-dotierten LuPO$_4$-Nanopartikeln für die biomedizinische Anwendung
Osnabrück : Universität Osnabrück 124 pp. (2024) [10.48693/565] = Dissertation, Universität Osnabrück, 2024
Im Rahmen der vorliegenden Arbeit wurden verschiedene Seltenerd-dotierte LuPO4-Nanopartikel mit einer modifizierten Fällungsmethode synthetisiert. Alle Proben wurden zunächst mittels Aufnahme von Pulverröntgendiffraktogrammen charakterisiert. [...]
[PUBDB-2024-01714]
Master Thesis
; ; Thermal and optical characterization of cryogenically cooled Yb:YLF laser
93 pp. (2024) [10.13140/RG.2.2.20360.43521] = Masterarbeit, University of Hamburg, 2024
This thesis focuses on two fundamental limitations that affect the power scaling of cryogenically cooled high-power solid-state lasers: (i) Fractional thermal load (FTL) and (ii) Thermal and population lensing. For FTL, a novel method is introduced for the direct measurement of fractional thermal load in cryogenically cooled laser crystals. [...]
[PUBDB-2025-00242]
Dissertation / PhD Thesis
Investigating the Microquasar SS 433 and the PeVatron Candidate MGRO J1908+06 with a Novel Extended Source Analysis Method
Humboldt-Universität zu Berlin 213 pp. (2024) [10.3204/PUBDB-2025-00242] = Dissertation, Humboldt-Universität zu Berlin, 2023
The origins of galactic Very-high energy; 100 GeV < E < 100 TeV (VHE) and Ultra-high energy; 100 TeV < E(VHE) cosmic rays remain largely unknown. However, recent studies suggest the existence of numerousgalactic sources known as PeVatrons, which have the ability to accelerate particles up to Petaelectronvolt (PeV)energies. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07056]
Dissertation / PhD Thesis
Beyond the Standard Model Orders of Charge–Parity Violation
Berlin : Humboldt-Universität zu Berlin 1-271 (2024) [10.18452/30008] = Dissertation, Humboldt-Universität zu Berlin, 2024
In this thesis, we use flavour invariants to systematically study solutions to problems of the Standard Model (SM) of particle physics with different effective field theories (EFTs). In Part I, we study Charge–Parity (CP) violation in the SM and SM EFT extended with light sterile neutrinos. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2025-00323]
Dissertation / PhD Thesis
Search for transient phenomena in the very-high-energy gamma-ray sky with H.E.S.S.
Berlin 149 pp. (2024) [10.3204/PUBDB-2025-00323] = Dissertation, Humboldt University of Berlin, 2024
Time-domain multi-messenger astronomy is the study of transient astrophysical phenomena using several messenger particles and waves. The High Energy Stereoscopic System (H.E.S.S.) is a ground-based telescope array, which measures very-high-energy gamma rays between 30 GeV and 100 TeV. [...]
[PUBDB-2024-07888]
Dissertation / PhD Thesis
Dynamic structure investigation and spectra prediction of biomolecules using machine learning techniques
TUHH Universitätsbibliothek 141 pp. (2024) [10.15480/882.9689] = Dissertation, Technische Universität Hamburg, 2024
The investigation of biomolecular structures and the prediction of their spectra using experimental and theoretical studies in the gas phase represent fundamental steps in comprehending their intrinsic properties and biological functions. Nonetheless, the complexity of the potential energy surface of biomolecules, combined with limitations in computational resources, limits the interpretation of experimental observations. [...]
[PUBDB-2024-00529]
Master Thesis
Time Resolution of a Fully-Integrated Digital Silicon Photo-Multiplier
65 pp. (2024) [10.3204/PUBDB-2024-00529] = Masterarbeit, University of Hamburg, 2024
Silicon Photo-Multipliers (SiPMs) are pixelated semiconductor detectors consisting of SPADs, usually used as single-photon sensitive detectors. SiPMs are often analog devices that require separate digitization. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07311]
Dissertation / PhD Thesis
Realtime detection of high-energy neutrinos and search for correlations with candidate source classes
Humboldt-Universität zu Berlin 175 pp. (2024) [10.3204/PUBDB-2024-07311] = Dissertation, HU Berlin, 2024
Das IceCube Neutrino Observatory ist das größte Neutrinoteleskop der Welt und befindet sich am Südpol. IceCube hat im Jahr 2013 einen isotropen Fluss astrophysikalischer Neutrinos entdeckt, aber ihre Herkunft bleibt größtenteils unbekannt [...]
[PUBDB-2024-05780]
Dissertation / PhD Thesis
Serial protein crystallography in cellulo
198 pp. (2024) [10.3204/PUBDB-2024-05780] = Dissertation, University of Hamburg, 2024
Elucidation of high-resolution three-dimensional protein structures via X-ray crystallography requires protein crystals for signal enhancement. Protein crystals have been observed in living cells from all domains of life. [...]
[PUBDB-2024-00819]
Bachelor Thesis
; ; New Beam Position Monitor System for PETRA IV
41 pp. (2024) = Bachelorarbeit, University of Hamburg, 2024
The PETRA IV project at DESY aims to upgrade the present synchrotron radiation sourcePETRA III into a source of ultra-low emittance with target emittance of 20pmrad. Thesmall beam emittance translates directly into much smaller beam sizes of about 7 μmhorizontally and 3 μm vertically at insertion device source points, thus imposing stringentrequirements on the machine’s stability. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2023-07269]
Dissertation / PhD Thesis
; ; Mid-IR frequency comb with sub-Hertz relative line width based on Raman soliton self-frequency shift
117 pp. (2024) = Dissertation, University of Hamburg, 2023
Optical frequency combs in the mid-infrared spectral region became an invaluable tool for molecular spectroscopy. This spectral region is filled with highly specific vibrational transitions which allow for a precise identification of the composition of gas mixtures and fundamental research of phenomena in physics and chemistry with highest precision. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07889]
Dissertation / PhD Thesis
; ; Influence of nanohydration on the structure and radiation-induced fragmentation of gas-phase biomolecules
232 pp. (2024) = Dissertation, University of Groningen and University of Caen Normandy, 2024
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-05847]
Book/Dissertation / PhD Thesis
Search for BSM Higgs bosons in final states with b-quarks with the full Run 2 CMS dataset
[DESY-THESIS-2024-014]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 283 pp. (2024) [10.3204/PUBDB-2024-05847] = Dissertation, Universität Hamburg, 2024
This thesis presents the search for heavy neutral Higgs bosons, produced in associationwith b-quarks and decaying into a b-quark pair in proton-proton collisions at a centre-ofmassenergy of 13 TeV at the LHC with the CMS detector. The process is chosen, giventhat a considerable enhancement of the coupling to b-quarks is possible in theories beyondthe Standard Model, such as the Minimal Supersymmetric extension of the StandardModel (MSSM) and the Two Higgs Doublet Model (2HDM). [...]
[PUBDB-2025-00138]
Dissertation / PhD Thesis
; ; ; et al Towards a Particle Accelerator Metaverse: Mixed Reality Interfaces for Operations of Complex Physics Facilities
Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky 1 - 172 (2024) = Dissertation, University of Hamburg, 2024
Large-scale physics facilities such as particle accelerators and high-power lasers are important laboratory equipment for industrial processes and scientific research. However, they also present some of the most demanding human-computer interaction (HCI) challenges in facility control and maintenance. [...]
External link: Fulltext
Fulltext
[PUBDB-2024-02019]
Dissertation / PhD Thesis
The Stretchable OLED Display
University of Southern Denmark 163 pp. (2024) [10.21996/QE6M-1464] = Dissertation, University of Southern Denmark, 2024
Documenting the evolution of flexible and stretchable electronics, this thesishighlights the shift from traditional circuits to innovative designs that leveragematerials like organic semiconductors and advanced substrates for enhancedmechanical, optical, and electrical properties.Recent advancements in flexible electronics, primarily due to effective management of bending strain, have unlocked diverse applications including wearabletechnology, flexible solar cells, bio-integrated devices, and notably, stretchableorganic displays, with the latter being a focal point of this project. While bendabledesigns have successfully entered commercial production, the development ofstretchable applications continues to pose significant challenges.The focus here is on optimizing each element of organic light-emitting diodes,from elastomeric substrates and electrodes to active organic layers, balancingperformance with cost-effectiveness for potential mass production. [...]
[PUBDB-2024-07705]
Dissertation / PhD Thesis
; Radiatiοn-induced prοcesses within DΝA in the gas phase
136 pp. (2024) = Dissertation, University of Caen, 2024
DNA damage is generally considered to be the most common and most important type of lesions in cells caused by ionizing radiation. While DNA damage caused by ionizing radiation poses serious risks to human health, it also makes radiation therapy a powerful tool for killing cancer cells and saving lives. [...]
[PUBDB-2024-05349]
Dissertation / PhD Thesis
; ; Time-and-Energy–Resolved Electron Dynamics in Atoms and Molecules with Intense Short-Wavelength Light
Heidelberg University Library 136 pp. (2024) [10.11588/HEIDOK.00035166] = Dissertation, Heidelberg University, 2024
This thesis investigates the interaction of ultrashort, extreme-ultraviolet (XUV) and soft x-ray laser pulses with atoms and molecules in the gas phase. In total, the subject is explored from four different perspectives, which are all based on the short- lived–coherent electronic responses to the laser pulses, and measured with transient absorption spectroscopy [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2025-00140]
Dissertation / PhD Thesis
; ; Optimal control in nonlinear optics by hybrid finite element and neural network techniques
UB HSU 1 - 247 (2024) [10.24405/16609] = Dissertation, Helmut Schmidt University, 2024
The subject of this thesis is the efficient simulation of nonlinear optical phenomena, especially frequency mixing processes. Unlike linear optics, where the response of the material to light remains constant regardless of the light's intensity, in nonlinear optics, this response varies as a function of the light's intensity. [...]
External link: Fulltext
Fulltext
[PUBDB-2024-01823]
Dissertation / PhD Thesis
; ; ; et al Towards a fault detection infrastructure for the European XFEL
Hamburg : TUHH Universitätsbibliothek (2024) [10.15480/882.9087] = Dissertation, Hamburg University of Technology, 2023
This thesis aims to analyze techniques for improving the fault detection capabilities of large cyber-physical systems. The Low-Level Radio Frequency (LLRF) control system of the European X-ray Free Electron Laser (XFEL) is the main target system. [...]
External link: Fulltext
Fulltext
[PUBDB-2024-01825]
Book/Dissertation / PhD Thesis
Development and Performance of a Fast Simulation Tool for Showers in High Granularity Calorimeters based on Deep Generative Models
[DESY-THESIS-2024-008]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 186 pp. (2024) [10.3204/PUBDB-2024-01825] = Dissertation, Universität Hamburg, 2024
Modern high energy physics experiments fundamentally rely on large quantities of simulateddata, placing significant demands on the available computational resources. Machine learningmethods based on deep generative models promise to reduce the compute time required tosimulate particle showers in the calorimeter system, which constitutes the most computationallyintensive part of a full detector simulation.This work focuses on the development of a first simulation tool based on deep generativemodels for shower simulation in highly granular calorimeters, and subsequently studies itsperformance in a realistic detector geometry. [...]
[PUBDB-2024-00440]
Book/Dissertation / PhD Thesis
$Z$ boson production in association with jets: measurement and phenomenology
[DESY-THESIS-2024-001]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 164 pp. (2024) [10.3204/PUBDB-2024-00440] = Dissertation, Universität Hamburg, 2023
In this thesis, we study two $Z$ boson production mechanisms: the Drell-Yan process andreal electroweak corrections.The transverse momentum spectrum of the Drell-Yan lepton pair is of general interest asit is sensitive to the hadron structure. Moreover, the small transverse momentum region, $q{\tiny T}$ $<$ m$_{ll}$, is sensitive to the 3D structure of the hadron. [...]
[PUBDB-2024-05606]
Book/Dissertation / PhD Thesis
Complete electroweak $\mathcal{O}(N_c^2)$ two-loop contributions to the Higgs boson masses in the MSSM and aspects of two-loop renormalisation
[DESY-THESIS-2024-012]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 197 pp. (2024) [10.3204/PUBDB-2024-05606] = Dissertation, Universität Hamburg, 2023
The MSSM is one of the most promising extensions of the SM. In the MSSM, the masses of the Higgs bosons can be predicted in terms of the other model parameters.In this thesis, we calculate for the first time the full electroweak two-loop contributions of $\mathcal{O}((\alpha_\text{em} + \alpha_\text{q})^2 N_c^2)$ to the MSSM Higgs boson masses using a Feynman-diagrammatic approach including the full dependence on the external momentum.These corrections are expected to constitute the dominant part of the two-loop corrections that were still missing up to now. [...]
OpenAccess: Daniel Meuser Dissertation final-1 - PDF PDF (PDFA); desy-thesis-24-012.title - PDF PDF (PDFA);
PDF PDF (PDFA); desy-thesis-24-012.title - PDF PDF (PDFA);
[PUBDB-2024-07054]
Dissertation / PhD Thesis
Development of Multi-Alkali Antimonide Photocathodes for High-Brightness RF Photoinjectors
Hamburg 333 pp. (2024) [10.3204/PUBDB-2024-07054] = Dissertation, University of Hamburg, 2024
Multi-alkali antimonide photocathodes can have high quantum efficiency similar to UV-sensitive Cs2Te photocathodes, but with the advantages of photoemission sensitivity inthe green wavelength and a significant reduction in the mean transverse energy of thephotoelectrons. To explore their feasibility for use in a high-gradient RF gun, DESYcollaborated with INFN LASA to develop multi-alkali photocathode materials. [...]
[PUBDB-2025-00559]
Book/Dissertation / PhD Thesis
Optics measurement and correctionfor future electron circular colliders
[DESY-THESIS-2025-001]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 176 pp. (2024) [10.3204/PUBDB-2025-00559] = Dissertation, Universität Hamburg, 2024
The development of ultra-low emittance storage rings, such as the e+/e- Future CircularCollider (FCC-ee) with a circumference of about 90 km, aims to achieve unprecedentedluminosity and beam size. One significant challenge is correcting the optics, which becomesincreasingly difficult as we target lower emittances [...]
[PUBDB-2024-06628]
Dissertation / PhD Thesis
Evidence for a break in the diffuse extragalactic neutrino spectrum
Humboldt-Universität zu Berlin 207 pp. (2024) [10.18452/29460] = Dissertation, Humboldt-Universität Berlin, 2024
Der Ursprung der kosmischen Strahlung ist ein hundert Jahre altes Rätsel der Astrophysik. Mit modernen Großobservatorien wurde die kosmische Strahlung bei immer höheren Energien gemessen, aber auch andere Boten wie Gammateilchen und Neutrinos werden nun zur Erforschung des nichtthermischen Universums eingesetzt. [...]
[PUBDB-2024-00759]
Book/Dissertation / PhD Thesis
Improved Particle Identification with the Belle II Calorimeter Using Machine Learning
[DESY-THESIS-2024-003]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 156 pp. (2024) [10.3204/PUBDB-2024-00759] = Dissertation, Universität Hamburg, 2024
This dissertation revolves around the utilization of Convolutional Neural Networks (CNNs) to advance Particle Identification (PID) within the Belle II Electromagnetic Calorimeter (ECL). The core goal of the research is to refine the differentiation process between low-momentum muons and charged pions. [...]
OpenAccess: Narimani_PhD_Dissertation.final - PDF PDF (PDFA); desy-thesis-24-003.title - PDF PDF (PDFA);
PDF PDF (PDFA); desy-thesis-24-003.title - PDF PDF (PDFA);
[PUBDB-2024-07624]
Book/Dissertation / PhD Thesis
Energy time ptychography for Mössbauer resonances
München : Dr. Hut, Physik 232 pp. (2024) [10.3204/PUBDB-2024-07624] = Dissertation, University of Hamburg, 2024
It is a fundamental problem in photon science that at X-ray energies, the oscillation frequency of the electromagnetic field is so high that a detector cannot measure the phase of an interacting object. This ‘phase problem’ also occurs in measurements of an object’s atomic-level properties using recoilless nuclear resonant scattering (NRS) of pulsed synchrotron radiation, which is based on the Mössbauer effect.In this thesis, we demonstrate how to use a ptychographic scanning technique to perform computational phase retrieval for an object in the energy domain via overlapping NRS measurements in the time domain. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-01329]
Book/Dissertation / PhD Thesis
Search for Heavy Majorana Neutrinos at the LHC
[DESY-THESIS-2024-005]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 179 pages incl. figures, tables and appendices (2024) [10.3204/PUBDB-2024-01329] = Dissertation, Universität Hamburg, 2024
The origin of neutrino masses is one of the open questions of particle physics. This thesis presents work on the high-energy equivalent of neutrinoless double-beta decay. [...]
OpenAccess: Neundorf_Dissertation_Veroeffentlichung - PDF PDF (PDFA); desy-thesis-24-005.title - PDF PDF (PDFA);
PDF PDF (PDFA); desy-thesis-24-005.title - PDF PDF (PDFA);
[PUBDB-2024-06640]
Bachelor Thesis
; ; The Influence of Parton Shower and Hadronization Models on Machine LearningJet Taggers
54 pp. (2024) = Bachelorarbeit, University of Hamburg, 2024
In simulating high-energy particle collisions, Monte Carlo event generatorsemploy different models to create parton showers and replicate hadronization.The choice of model can influence the final state of the simulation and,consequently, the subsequent analysis of the generated event. This study utilizeda machine learning algorithm to discern the differences between quark and gluonjets generated through different approaches to showering and hadronization.Initially, particle jets from dijet events generated using Pythia, Sherpa and Herwigwere compared across various jet- and particle-level properties. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-00533]
Dissertation / PhD Thesis
; ; ; et al Fortgeschrittene Methoden der Quantenkristallographie zur Ladungsdichteuntersuchung von organischen und metallorganischen Verbindungen
250 pp. (2024) = Dissertation, Bergische Universität Wuppertal, 2023
The Python3 based code - ReCrystal - has been developed as a novel iterative quantum crystallographic refinement method. This refinement method, similar to other transferable form factor approaches such as the Invariom model, uses theoretical multipole parameters to describe the deformation density in an iterative procedure, similar to Hirshfeld atomic refinement, using solid state calculations performed with CRYSTAL17. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-04867]
Dissertation / PhD Thesis
Insights into rRNA binding and lncRNAs in Brassicaceae
129 pp. (2024) [10.3204/PUBDB-2024-04867] = Dissertation, University of Hamburg, 2024
Plants must quickly adapt to their surroundings due to their sessile nature. Their ability to adjustand thrive in diverse environmental conditions directly impacts their growth and development.This is especially critical for crop plants, where quantity and quality are vital to secure properglobal nutrition. [...]
[PUBDB-2024-00911]
Bachelor Thesis
; ; Reweighting Monte Carlo Simulations with Deep Neural Networks
36 pp. (2024) = Bachelorarbeit, University of Hamburg, 2024
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-05403]
Dissertation / PhD Thesis
Cosmic Rays and the Radio Neutrino Observatory Greenland (RNO-G)
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) 141 pp. (2024) [10.25593/OPEN-FAU-957] = Dissertation, Friedrich-Alexander-Universität Erlangen-Nürnberg, 2024
Neutrinos are unique messengers, as they travel unimpeded over cosmological distances, pointing back to their sources. As their production is tightly coupled to that of ultra-high energy cosmic rays, they could help us to understand the ultra-high energy universe. [...]
[PUBDB-2024-07927]
Dissertation / PhD Thesis
Few-cycle laser pulses for compact plasma accelerators
Friedrich-Schiller-Universität Jena 133 pp. (2024) [10.3204/PUBDB-2024-07927] = Dissertation, Friedrich-Schiller-Universität Jena, 2024
Laser-driven plasma accelerators (LPAs) offer an efficient and highly compact alternative to conventional radio-frequency (RF) accelerators. This technology provides the potential to extend the application range of accelerators to a wider community, including science, industry, and healthcare. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07309]
Dissertation / PhD Thesis
Optical Follow-Up of High-Energy Neutrinos
Humboldt-Universität zu Berlin 175 pp. (2024) [10.18452/29354] = Dissertation, HU Berlin, 2024
Diese Dissertation untersucht den Ursprung der hochenergetischen Neutrinos, welche das IceCube-Observatorium am Südpol seit einer Dekade detektiert. Sie stellt das junge Feld der Neutrino-Astronomie vor und beschreibt das systematische Follow-Up-Programm für hochenergetische Neutrinos, das wir seit vier Jahren mit der Zwicky Transient Facility (ZTF) durchführen, einem optischen Teleskop. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-05763]
Dissertation / PhD Thesis
Renormalization and the Double Copy of Effective Field Theories
Humboldt-Universität zu Berlin 253 pp. (2024) [10.18452/29107] = Dissertation, Humboldt-Universität zu Berlin, 2024
The Standard Model of particle physics can be seen as the low energy limit of a more general Standard Model effective field theory (SMEFT), which captures the dynamics of possible ultraviolet completions in terms of higher-dimensional operators. The associated parameter space is large and involves intricate mixing patterns under the renormalization group (RG) flow. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-06298]
Master Thesis
; ; Studien zur Rekonstruktion der invarianten Masse von Top-Antitop-Paaren im dileptonischen Kanal mit Hilfe eines neuronalen Netzwerkes am ATLAS Detektor.
71 pp. (2024) = Masterarbeit, Humboldt Universität zu Berlin, 2024
The studies in this thesis are motivated by the measurement of the top quark Yukawa coupling Ytrelative to the SM value in the dileptonic decay channel of top-antitop (t¯t) pairs at the ATLAS experiment. The used (simulated) data correspond to the proton-proton collision data recorded between 2015 and 2018 at √s=13 TeV with an integrated luminosity of 140 fb−1. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07357]
Book/Dissertation / PhD Thesis
Optimizing a Transition Edge Sensor detector system for low flux infrared photon measurements at the ALPS II experiment
[DESY-THESIS-2024-018]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 127 pp. (2024) [10.3204/PUBDB-2024-07357] = Dissertation, Universität Hamburg, 2024
This thesis investigates the optimization of a Transition-Edge Sensor (TES) for the Any Light Particle Search II (ALPS II) experiment. The ALPS II experiment searches for axions and axion-like particles, which are predicted by several beyond-standard model theories and are good candidates for dark matter. [...]
[PUBDB-2024-06129]
Bachelor Thesis
; Synthese und Reaktivität arylierter Aluminiumverbindungen
Frankfurt am Main 56 pp. (2024) = Bachelorarbeit, Johann Wolfgang Goethe-Universität in Frankfurt am Main, 2024
[PUBDB-2024-01771]
Dissertation / PhD Thesis
Analyses of Structure and Functional Dynamics of Penicillin-binding Proteins in Staphylococci
Hamburg 183 pp. (2024) [10.3204/PUBDB-2024-01771] = Dissertation, University of Hamburg, 2024
Addressing the challenge posed by multi-resistant bacterial infections, particularly thosecaused by Staphylococcus epidermidis and Staphylococcus aureus, is paramount inmodern medical research. This dissertation delves into the study of Penicillin-bindingProteins (PBPs), with a specific focus on SePBP3, as essential targets for novelantibacterial drug development. [...]
[PUBDB-2024-00870]
Dissertation / PhD Thesis
Cosmic-ray transport and signatures in their local environment
Universität Potsdam 169 pp. (2024) [10.3204/PUBDB-2024-00870] = Dissertation, University of Potsdam, 2023
The origin and structure of magnetic fields in the Galaxy are largely unknown. What is known is that they are essential for several astrophysical processes, in particular the propagation of cosmic rays. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-06962]
Dissertation / PhD Thesis
In-operando studies of piezoelectric HfZro$_2$ film on InAs nanowires
140 pp. (2024) [10.3204/PUBDB-2024-06962] = Dissertation, University of Hamburg, 2024
The use of imaging tools is critical to our Comprehension of the Universe. Imagingsystems offer vital scientific data on anything from galaxies and stars, examined bymassive Telescopes, to micro- and nanostructures, examined by Microscopes. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-04866]
Dissertation / PhD Thesis
Unravelling conformational flexibility and chirality in molecules using microwave spectroscopy
226 pp. (2024) [10.3204/PUBDB-2024-04866] = Dissertation, Christian-Albrechts-Universität zu Kiel, 2024
Aspects such as conformational flexibility and chirality play a critical role in biochemical and pharmacological processes. Therefore, a comprehensive understanding of molecular structure, intra- and intermolecular forces, and chirality is required to comprehend the interplay between the three-dimensional structure of a biomolecule and its functionality. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07359]
Dissertation / PhD Thesis
; ; ; et al Extraction of top-Yukawa coupling from $t\bar{t}$ cross-section in single-leptonic final state with $\sqrt{s}$ = 13TeV data from the ATLAS detector
185 pp. (2024) = Dissertation, Humboldt University, 2024
In the Standard Model (SM) of particle physics, the interaction of fermions with the Higgs field is referred to as the Yukawa interaction, the strength of which is proportional to the mass of the fermions. The top quark, being the heaviest fermion, exhibits the largest value of the Yukawa coupling strength. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07213]
Book/Dissertation / PhD Thesis
; ; ; et al In situ Characterization of Deformation Mechanisms in Harmonic Structure Nickel
91 pp. (2024) = Dissertation, Lund University, 2024
There is an ever-increasing demand for structural metals with higher strength. Metals can be strengthened by reducing grain size in their microstructure, but ductility is also concomitantly reduced. [...]
[PUBDB-2025-00428]
Master Thesis
; ; Denoising Methods for Multi-Dimensional Photoemission Spectroscopy
Aachen : RWTH Aachen 92 pp. (2024) = Masterarbeit, RWTH Aachen, 2025
The probabilistic nature of photoemission, combined with the exploration of large multidimensional parameter spaces–including momentum, energy, time and spin polarization–necessitates time-intensive data acquisition to ensure statistical robustness. These measurements are especially important for capturing ultrafast phenomena, where pulsed light sources, such as free-electron lasers (FELs), become indispensable due to their ability to deliver high-brightness, ultrashort X-ray pulses. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07058]
Dissertation / PhD Thesis
; Looking Into the Deep: Investigating Micro- and Nanoscale Biomineral Architecture of Marine Organisms Using Advanced Characterization Techniques
Boca Raton, FL, USA 186 pp. (2024) = Dissertation, Florida Atlantic University, 2024
Living organisms synthesize and assemble complex bioinorganic composites with enhanced structure and properties to fulfill needs such as structural support and enhanced mechanical function. With the advent of advanced materials characterization techniques, these biomineral systems can be explored with high resolution to glean information on their composition, ultrastructure, assembly, and biomechanics. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-00715]
Book/Dissertation / PhD Thesis
Searching for Dark Matter produced in association with top quarks with the CMS experiment at the LHC
[DESY-THESIS-2024-002]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 129 pp. (2024) [10.3204/PUBDB-2024-00715] = Dissertation, Universität Hamburg, 2023
A search is presented for dark matter (DM) produced in association with top quarks in final states with two leptons with data collected by the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider between 2016 and 2018. This search targets the single top quark + DM (t + DM) signal in addition to the top quark pair + DM ($t\bar{t}$ + DM) process for the first time in the dileptonic channel [...]
[PUBDB-2024-06300]
Bachelor Thesis
; ; Suppression of Light $q\bar{q}$ Backgrounds with Multivariate Techniques in the Measurement of Radiative B-Meson Decays
Hamburg 66 pp. (2024) = Bachelorarbeit, University of Hamburg, 2024
The Standard Model of particle physics has been highly successful in describing fundamental particles and their interactions, but potential extensions are needed to address itslimitations. Precise measurements of rare decays, such as the radiative B → Xsγ decay, provide an opportunity to test Beyond Standard Model (BSM) theories, due to them being suppressed by the Standard Model [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-06335]
Book/Dissertation / PhD Thesis
Exploring the dark universe with gravitational wave backgrounds
[DESY-THESIS-2024-016]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 219 pp. (2024) [10.3204/PUBDB-2024-06335] = Dissertation, Universität Hamburg, 2024
Gravitational waves have recently emerged as a novel messenger inastronomy, providing profound insights into the evolution of the cosmos:Last year, several pulsar timing arrays (PTAs) announced the detectionof a gravitational wave background (GWB) at nHz frequencies, markinga significant milestone in this field. This discovery can be interpretedas a signal emitted by the inspiral of supermassive black holes duringhierarchical structure formation. [...]
[PUBDB-2024-05043]
Book/Dissertation / PhD Thesis
Analytic and Algebraic Studies of Feynman Integrals
[DESY-THESIS-2024-010]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 170 pp. (2024) [10.3204/PUBDB-2024-05043] = Dissertation, Universität Hamburg, 2024
Feynman integrals are central to the calculation of scattering amplitudes both in particle and gravitationalwave physics. This thesis presents advancements in both the analytical and algebraicstructure of these integrals and shows how this can be used for efficient evaluation of these integrals.Paper I. [...]
[PUBDB-2024-00944]
Dissertation / PhD Thesis
Search for eV-scale sterile neutrinos with IceCube DeepCore
Humboldt-Universität zu Berlin 157 pp. (2024) [10.18452/27595] = Dissertation, HU Berlin, 2023
Neutrinooszillationen sind das einzige Phänomen jenseits des Standardmodells, das experimentell mit hoher statistischer Signifikanz bestätigt wurde. Diese Arbeit präsentiert eine Messung der atmosphärischen Neutrinooszillationen unter Verwendung von acht Jahren an Daten, die zwischen 2011 und 2019 vom IceCube DeepCore-Detektor aufgenommen wurden [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-07555]
Bachelor Thesis
; ; Characterization of the pedestal calibration for the Belle II Pixel Detector
44 pp. (2024) = Bachelorarbeit, University of Hamburg, 2024
The pixel detector of the Belle II experiment is based on the DEPFET technology. Fora reliable readout, it is essential to determine the pedestal (baseline current) of each pixel.This work focuses on characterizing the pedestal measurements and their development overtime. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2025-00425]
Dissertation / PhD Thesis
Electromagnetic Design of High-Gradient THz Accelerators
136 pp. (2024) [10.3204/PUBDB-2025-00425] = Dissertation, University of Hamburg, 2024
Dielectric Loaded Waveguide Linear Accelerators (DLW LINACs) and single-sided THz boosters are the main accelerator components of the AXSIS machine, powered by multi-cycle and single-cycle THz pulses, respectively. These components hold great promise for compact linear accelerators (LINACs) due to their ability to sustain higher breakdown fields at THz frequencies compared to conventional RF components. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2025-00677]
Dissertation / PhD Thesis
; ; Lamellar gratings for reflective split-and-delay unit in XUV spectral range
UB HSU 1 - 99 (2024) [10.24405/17105] = Dissertation, Helmut-Schmidt-Universität, 2024
Gegenstand dieser Arbeit ist die hochpräzise Herstellung von Silizium-Lamellengitterspiegeln für die reflektierende Split-and-Delay-Unit (SDU) im extremen Ultraviolett- und weichen Röntgenbereich (Photonenenergien von 10 eV bis ~1 keV). Um die gute Reflektivität der Spiegel zu gewährleisten, war es notwendig, eine gute Oberflächenqualität zu erhalten, um die geringe Rauheit zu bewahren und die auftretenden Verformungen zu minimieren. [...]
Restricted: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-05347]
Dissertation / PhD Thesis
Coulomb explosion imaging and covariance analysis of concurrent fragmentation mechanisms
University of Oxford 256 pp. (2024) [10.5287/ORA-Z6JGMXRRA] = Dissertation, University of Oxford, 2024
This thesis uses Coulomb explosion imaging and covariance analysis to characterise concurrent fragmentation processes generating identical sets of products via different reaction pathways, highlighting the potential of extending these methods to study the photochemistry of larger, more chemically relevant species than those that have previously been studied. The photodissociation dynamics of CH2I2 at 202.5 nm were investigated using site-selective ionisation at the I 4d orbitals using photons of 95 eV. [...]
OpenAccess: PDF PDF (PDFA);
PDF PDF (PDFA);
[PUBDB-2024-05764]
Book/Dissertation / PhD Thesis
Measurement of Charm Production in CMS and Total Charm Cross Section with Non-Universal Charm Fragmentation
[DESY-THESIS-2024-013]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 362 pp. (2024) [10.3204/PUBDB-2024-05764] = Dissertation, Universität Hamburg, 2024
This thesis presents differential and total charm cross section measurements at various centerof-mass energies in pp collisions. For the purpose of measuring the total charm cross section,the D∗+ differential cross sections are measured at √s = 7, 0.9 and 13 TeV in the CMSdetector by covering the largest possible phase space, resulting in the smallest extrapolationfactor ever introduced at the LHC. [...]
