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DISSERTATIONEN - MASTERARBEITEN - BACHELORARBEITEN 2025
[PUBDB-2025-01195]
Book/Bachelor Thesis
Long-Lived Axion-Like Particles at the Future Circular Electron-Positron Collider
[DESY-THESIS-2025-007]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 51 pp. (2025) [10.3204/PUBDB-2025-01195] = Bachelorarbeit, Universität Hamburg, 2025
As the leading theory in particle physics, the Standard Model (SM) defines our understanding of the subatomic world. However, observed phenomena have proven that the SM, despite its great success, is not complete yet and the search for particles Beyond the Standard Model (BSM) has surged ever since. [...]
[PUBDB-2025-02444]
Dissertation / PhD Thesis
; ; τ -Lepton Lifetime Measurement andWorking Point Optimization for the PixelVertex Detector at Belle II
257 pp. (2025) = Dissertation, University of Hamburg, 2025
In the Standard Model of Particle Physics, all leptons have the same coupling strength tothe weak interaction. Comparing the theoretical model with experimental observations revealsa slight deviation in the electron branching fraction of τ -lepton decays. [...]
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[PUBDB-2025-01364]
Dissertation / PhD Thesis
Hidden symmetries in four-dimensional $\mathcal{N} = 2$ superconformal gauge theories
126 pp. (2025) [10.3204/PUBDB-2025-01364] = Dissertation, University of Hamburg, 2025
The integrability properties of $\mathcal{N}=4$ Super-Yang-Mills in the planar limit have been studied extensively and are well understood. For certain classes of theories, obtained by orbifolding $\mathcal{N}=4$ Super-Yang-Mills, it was shown that planar integrability is actually inherited and persists at the orbifold point. [...]
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[PUBDB-2025-00387]
Master Thesis
; ; ; et al Implementation of the Matrix Element Method and a Jet Clustering Algorithm with Machine Learning at Future Higgs Factories
104 pp. (2025) = Masterarbeit, Technische Universität München, 2024
A top priority of future collider programs is to measure the value of the Higgs self-coupling λ. Through double Higgs production (ZHH), this is possible by direct measurement at lepton colliders. [...]
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[PUBDB-2025-01265]
Master Thesis
; ; ; et al Implementation of the Matrix Element Method and a Jet Clustering Algorithm with Machine Learning at Future Higgs Factories
104 pp. (2025) = Masterarbeit, Technische Universität München, 2024
A top priority of future collider programs is to measure the value of the Higgs self-coupling λ. Through double Higgs production (ZHH), this is possible by direct measurement at lepton col-liders. [...]
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[PUBDB-2025-01750]
Bachelor Thesis
Entwicklung eines steuerungsrelevanten Kennzahlenkonzeptes zur Beurteilung der Kosteneffizienz in Forschungszentren am Beispiel des DESY
50 pp. (2025) [10.3204/PUBDB-2025-01750] = Bachelorarbeit, Berufliche Hochschule Hamburg, 2025
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[PUBDB-2025-01037]
Book/Dissertation / PhD Thesis
Performance Evaluation of the FASTPIX Silicon Pixel SensorTechnology Demonstrator for High-PrecisionTracking and Timing
[DESY-THESIS-2025-006]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 185 pp. (2025) [10.3204/PUBDB-2025-01037] = Dissertation, Universität Hamburg, 2024
The advancement of particle physics through current and future collider facilities pushes theboundaries of technology in HEP instrumentation. Experiments at the energy and intensityfrontier focus on high-precision measurements of Standard Model physics and searches forphysics beyond the Standard Model. [...]
[PUBDB-2025-01019]
Book/Dissertation / PhD Thesis
Test Beam Studies of Prototype Module and Test Measurements of MaPSA for the CMS Outer Tracker Phase-2 Upgrade
[DESY-THESIS-2025-005]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 174 pp. (2025) [10.3204/PUBDB-2025-01019] = Dissertation, Universität Hamburg, 2025
The High-Luminosity Large Hadron Collider (HL-LHC) represents a significant leap inthe pursuit of fundamental physics. Scheduled to operate at a center-of-mass energy of14 TeV and a peak instantaneous luminosity up to 7. [...]
[PUBDB-2025-01533]
Dissertation / PhD Thesis
; ; Scintillating Nanocomposites Based on Lead Halide Perovskite Nanocrystals
123 pp. (2025) = Dissertation, Scuola Di Dottorato Universita Degli Studi Di Milano-Bicocca, 2023/2024
In recent years, perovskite nanocrystals (CsPbX3, with X = Cl, Br, I) have emerged as a new class of materials for photonic and optoelectronic applications due to their exceptional synthetic scalability through solution-based processes, room-temperature fabrication and remarkable physical properties such as high emission efficiency and defect tolerance. Additionally, these materials possess tunable optical properties through controlled adjustments of their size and composition. [...]
[PUBDB-2025-02377]
Dissertation / PhD Thesis
; ; Measurement of Astrophysical Neutrino flavour composition with Twelve Years of IceCube Data
Humboldt-Universität zu Berlin 159 pp. (2025) [10.18452/33426] = Dissertation, HU Berlin, 2025
Kosmische Strahlung und hochenergetische Neutrinos stammen aus extremen astrophysikalischen Umgebungen, wo kosmische Strahlen mit Materie oder Photonen interagieren und Neutrinos erzeugen. Die auf der Erde beobachtete Flavour-Zusammensetzung liefert Einblicke in deren Ursprünge. [...]
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[PUBDB-2025-01709]
Book/Dissertation / PhD Thesis
The Higgs Branch of Six Dimensional Supersymmetric Theories: Magnetic Quivers, Geometry, and Hasse Diagrams
[DESY-THESIS-2025-010]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 217 pp. (2025) [10.3204/PUBDB-2025-01709] = Dissertation, Universität Hamburg, 2025
In this thesis, we report recent advancements in the understanding of Higgs branch moduli spacesof six-dimensional (1,0) supersymmetric quantum field theories, along with related developments.These progresses have been achieved by exploiting the interplay between geometrical engineeringand techniques in quiver gauge theories, leading to new insights into the Higgs mechanism’s actionin higher-dimensional supersymmetric theories.Paper I: We present an extension of the magnetic quiver technique to a class of non-gravitationalsupersymmetric quantum field theories in six dimensions known as Little String Theories (LSTs).These theories also exhibit a higher-group symmetry structure. Notably, we prove a monotonicitytheorem describing the evolution of κR, a quantity characterizing the higher group symmetry, underpartial Higgsing patterns.Paper II: Specializing to a brane engineering framework, we construct a family of LST modelswith a natural interpretation as an F-theory compactification. [...]
OpenAccess: desy-thesis-25-010.title - PDF PDF (PDFA); Lorenzo_Mansi_PhD_Dissertation - PDF PDF (PDFA);
PDF PDF (PDFA); Lorenzo_Mansi_PhD_Dissertation - PDF PDF (PDFA);
[PUBDB-2025-02203]
Book/Dissertation / PhD Thesis
Search for Light Pseudoscalars in Exotic Decays of the Higgs Boson with the CMS Experiment
[DESY-THESIS-2025-013]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY THESIS 259 pp. (2025) [10.3204/PUBDB-2025-02203] = Dissertation, Universität Hamburg, 2025
This thesis presents a search for a pair of light pseudoscalar bosons produced from the decays of the 125 GeV Higgs boson, focusing on final states with four tau leptons. This searchis motivated by numerous beyond the standard model theories that predict an extended scalar sector, introducing a wide array of new physical states beyond the single Higgs boson observed in the standard model. [...]
[PUBDB-2025-00811]
Book/Dissertation / PhD Thesis
Development of a Tree-Based Model for the Fast Generation of Large Point Clouds Representing Particle Showers in Calorimeters
[DESY-THESIS-2025-003]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 233 pp. (2025) [10.3204/PUBDB-2025-00811] = Dissertation, RWTH Aachen University, 2025
In High-Energy Physics, detailed and time-consuming simulations are neededto describe particle showers in calorimeters. These particle showers arerecorded as energy deposits (hits) in the cells of the detector. [...]
OpenAccess: desy-thesis-25-003.title - PDF PDF (PDFA); Moritz Scham thesis_publication - PDF PDF (PDFA);
PDF PDF (PDFA); Moritz Scham thesis_publication - PDF PDF (PDFA);
[PUBDB-2025-01839]
Book/Dissertation / PhD Thesis
Generating Calorimeter Showers as Point Clouds
[DESY-THESIS-2025-011]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 175 pp. (2025) [10.3204/PUBDB-2025-01839] = Dissertation, RWTH Aachen University, 2025
Simulating particle interactions within high-energy physics detectors is essential for interpretingexperimental data and advancing our understanding of fundamental physics. Calorimetersmeasure particle energies through cascades known as showers, but their complex responsesand the computational intensity of traditional simulation tools like Geant4 posesignificant challenges. [...]
[PUBDB-2025-01721]
Book/Dissertation / PhD Thesis
Multidimensional and Multimodal Soft X-ray Methods for Quantum Materials Research
[DESY-THESIS-2025-009]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 171 pp. (2025) [10.3204/PUBDB-2025-01721] = Dissertation, Universität Hamburg, 2025
Quantum materials are governed by a complex interplay of spin, orbit, charge and lattice degrees of freedom, resulting in emergent phenomena like high-temperature superconductivity, charge and orbital ordering and insulator-to-metal transitions (IMTs). Often, the interaction of these subsystems results in an energy landscape with multiple local minima favouring different phases. [...]
OpenAccess: PhD-Thesis_Schunck_for_publication - PDF PDF (PDFA); desy-thesis-25-009.title - PDF PDF (PDFA);
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[PUBDB-2025-01898]
Dissertation / PhD Thesis
Supercapacitors with Aqueous Electrolytes: What Can We Learn from In-Situ and Operando Synchrotron and Neutron Techniques?
217 pp. (2025) = Dissertation, Montanuniversität Leoben, 2025
This thesis investigates the fundamental processes governing supercapacitors with aqueous electrolytes through the development and application of in-situ and operando synchrotronand neutron techniques. Using a suite of complementary methods, including X-ray Transmission (XRT), X-ray Fluorescence (XRF), (Anomalous) Small-Angle X-ray Scattering ((A)SAXS), Small-Angle Neutron Scattering (SANS), X-ray Diffraction (XRD), and Neutron Diffraction (ND), a detailed experimental framework is established to probe supercapacitor behaviour under working conditions. [...]
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[PUBDB-2025-00311]
Dissertation / PhD Thesis
; ; TCAD Simulations and Test Beam Characterization of MAPS for Future Lepton Colliders
124 pp. (2025) = Dissertation, University of Bonn, 2024
Monolithic active pixel sensors (MAPS) produced in a 65 nm CMOS imaging technology are being investigated for applications in particle physics. The MAPS design has a small collection electrode with an input capacitance of ~fF, granting a high signal-to-noise ratio and low power consumption. [...]
[PUBDB-2025-01873]
Dissertation / PhD Thesis
Towards Spin-Polarized Electron Beams from a Laser-Plasma Accelerator
Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky 227 pp. (2025) [10.3204/PUBDB-2025-01873] = Dissertation, University of Hamburg, 2025
The LEAP (Laser Electron Acceleration with Polarization) project at DESY is a proof-of-principle experiment aiming to demonstrate the generation -- thus also the transport -- of spin-polarized electron beams from a laser-plasma accelerator (LPA). This is expected to be achieved using a pre-polarized plasma source, generated via the photodissociation of HCl molecules with an ultraviolet (UV) dissociation laser. [...]
[PUBDB-2025-00758]
Book/Dissertation / PhD Thesis
From detectors to data: Thermal Characterization of CMS Outer Tracker modules and Measurement of the top quark mass using $t$$\overline{t}$$\large{+}$ jet events
[DESY-THESIS-2025-002]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 248 pp. (2025) [10.3204/PUBDB-2025-00758] = Dissertation, Bergische Universität Wuppertal, 2025
This thesis addresses key challenges in modern particle physics by contributing to three critical areas: the development of particle detectors, their calibration and the analysis of data collected in particle physics experiments. Contributions to these areas are presented in the context of the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). [...]
OpenAccess: Ana_Ventura_Barroso_thesisFinal - PDF PDF (PDFA); desy-thesis-25-002.title - PDF PDF (PDFA);
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[PUBDB-2025-02111]
Book/Dissertation / PhD Thesis
Studies of a Digital SiPM and MAPS Prototypes as Key Technologies for Future High-Energy Physics Experiments
[DESY-THESIS-2025-012]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 169 pp. (2025) [10.48565/BONNDOC-546] = Dissertation, University of Bonn, 2025
Digital Silicon Photomultipliers (dSiPMs) and Monolithic Active Pixel Sensors (MAPS) are emerging technologies, fabricated using commercial Complementary Metal-Oxide-Semiconductor (CMOS) processes. These detectors have the potential to become key components in High-Energy Physics (HEP), with the ability to meet the demanding requirements of future experiments. [...]
[PUBDB-2025-00829]
Book/Dissertation / PhD Thesis
Search for dark matter using heavy object tagging and angular correlations with missing momentum with one electron or muon with Run 2 data of the CMS Experiment
[DESY-THESIS-2025-004]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 165 pp. (2025) [10.3204/PUBDB-2025-00829] = Dissertation, RWTH Aachen University, 2024
This thesis presents a search for supersymmetry using 138 fb−1 of proton-proton collisionat center-of-mass energy of √s = 13 TeV. The data was collected by the CMS detectorat the LHC at CERN in 2016–2018. [...]
