| Batool, Binish | Differential cross-section measurement of $t\bar{t}\gamma$ production and interpretation in the context of effective field theory using ATLAS detector data at $\sqrt{s}$ = 13 TeV | 2025 | Prof. Ivor Fleck | ATLAS | doi.org/10.25819/ubsi/10784 | 
    
    
      | Cervato, Beatrice | Performance analyses of low-energy secondary-vertex reconstruction and studies towards the extraction of the top-quark Yukawa coupling from the $t \bar t$ cross section with the ATLAS experiment | 2025 | Prof. Markus Cristinziani | ATLAS | doi.org/10.17181/x04ky-46g18 | 
    
    
      | Öncel, Ogul | Evidence for $t \bar{t} \, t \bar{t}$ production in the multilepton final state in proton–proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector at the LHC | 2024 | Prof. Markus Cristinziani | ATLAS | CERN-THESIS-2024-286 | 
    
    
      | Dünkel, Fabian | Test of Lorentz invariance: exploiting the potential of air showers at ultra-high energy | 2024 | Prof. Markus Risse | Auger |  | 
    
    
      | Mondal, Buddhadeb | Measurement of differential cross-sections of the process $t \bar{t} \gamma$ with the ATLAS detector | 2024 | Priv.Doz. Carmen Diez Pardos | ATLAS | CERN-THESIS-2024-377 | 
    
    
      | Owtscharenko, Nikolaus | Development of a silicon pixel tracker for the measurement of the differential charm cross section of 400 GeV/c proton collisions on a SHiP-like thick target | 2023 | Prof. Markus Cristinziani | SHiP | CERN-THESIS-2023-146 | 
    
    
      | Rej, Amartya | Enlightening a tiny difference: Measurement of top quark pair charge asymmetry in $t \bar{t} + \gamma$ production at LHC using the ATLAS detector at $\sqrt{s} = 13 \, \text{TeV}$ | 2023 | Prof. Ivor Fleck | ATLAS | CERN-THESIS-2023-356 | 
    
    
      | Meshreki, John | Differential cross-section measurements of the associated production of top quarks with a photon at 13 TeV with the ATLAS detector | 2021 | Prof. Ivor Fleck | ATLAS |  | 
    
    
      | Leyko, Agnieszka | Measurement of the Top Quark Decay Branching Fraction Ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the Inclusive Production Cross Section $pp \to t\bar{t}$ in the Dilepton Channel at ATLAS | 2020 | Prof. Markus Cristinziani | ATLAS | CERN-THESIS-2020-375 | 
    
    
      | Rühl, Philip | Probing the Sources of Gravitational Waves | 2020 | Prof. Markus Risse | Auger |  | 
    
    
      | Bayerlein, Reimund | Coincident Detection of Cherenkov Photons for Medical Applications | 2020 | Prof. Ivor Fleck | Compton Camera |  | 
    
    
      | Ghasemi, Sara | Cross-Section Measurement of $t \bar{t} \gamma$ Production in $pp$ Collisions at $\sqrt{s} = 8$ and $13 \, \text{TeV}$ with the ATLAS Experiment | 2019 | Prof. Ivor Fleck | ATLAS |  | 
    
    
      | Heer, Sebastian | Top-Quark Pair Production in Association with a Z Boson in the Final State with Four Charged Leptons | 2019 | Prof. Markus Cristinziani | ATLAS | BONN-IR-2019-07 CERN-THESIS-2019-207 | 
    
    
      | Gottardo, Carlo Alberto | Search for Charged Lepton-Flavour Violation in Top-Quark Decays at the LHC with the ATLAS Detector | 2019 | Prof. Markus Cristinziani | ATLAS | BONN-IR-2019-04 CERN-THESIS-2019-055 | 
    
    
      | Sciandra, Andrea | Probing the Standard Model of Particle Physics with $t \bar{t} H$, $WWZ$ and $WZZ$ Multilepton Final States | 2018 | Prof. Markus Cristinziani | ATLAS | CERN-THESIS-2018-445 BONN-IR-2019-05 | 
    
    
      | Shirazi, Amir Noori | Track Reconstruction for InGrid Chips for a Time Projection Chamber | 2018 | Prof. Ivor Fleck |  |  | 
    
    
      | Heimann, Philipp | A Test for the Existence of Protons in Ultra-High Energy Cosmic Rays | 2018 | Prof. Markus Risse | Auger |  | 
    
    
      | Ghneimat, Mazuza | Probing the Top-Quark Coupling to the Photon Through the Cross-Section Measurement of $t \bar{t} \gamma$ Production in $pp$ Collisions with the ATLAS Detector | 2018 | Prof. Markus Cristinziani | ATLAS | BONN-IR-2018-05 CERN-THESIS-2018-056 | 
    
    
      | Atlay, Naim Bora | Differentiating Top-Quark - Photon Coupling: Inclusive and Differential Cross-Section Measurements of Top-Quark Pair Production in Association with a Photon in the Single Lepton Channel in $pp$ Collisions Data at $\sqrt{s} = 8 \, \text{TeV}$ with the ATLAS Experiment | 2017 | Prof. Ivor Fleck | ATLAS |  | 
    
    
      | Bruscino, Nello | A Gateway to New Physics: Direct Measurement of the Top Yukawa Coupling to the Higgs Boson | 2017 | Prof. Markus Cristinziani | ATLAS | BONN-IR-2017-04 CERN-THESIS-2017-084 | 
    
    
      | Wong, Kaven Henry Yau | Measurement of the Top-Quark Mass and the $t \bar{t} Z $ Cross Section in ATLAS: the $t \bar{t}$ Dilepton Way | 2015 | Prof. Markus Cristinziani | ATLAS | BONN-IR-2015-06 CERN-THESIS-2015-089 | 
    
    
      | Niechciol, Marcus | A New Window to the Universe? - Searching for Ultra-High-Energy Photons at the Pierre Auger Observatory | 2015 | Prof. Markus Risse | Auger |  | 
    
    
      | Czirr, Hendrik | Measurement of the Charge Asymmetry in the Top-Quark Dilepton Decay Channel in $pp$ Collision Data at $\sqrt{s} = 7 \, \text{TeV}$ Using the ATLAS Detector | 2014 | Prof. Ivor Fleck | ATLAS |  | 
    
    
      | Shahid, Saiqa | Development of a GEM Based Time Projection Chamber Prototype Using a Pixelized Readout System | 2014 | Prof. Ivor Fleck |  |  | 
    
    
      | Fröhlich, Uwe | Firmware, Detector Performance and First Data of the AMIGA Muon Counters for the Pierre Auger Observatory | 2013 | Prof. Peter Buchholz | Auger |  | 
    
    
      | Rosenthal, Oliver | Evidence and Cross Section Measurement of the Process $pp \rightarrow t \bar{t} \gamma$ at a Center-Of-Mass Energy of $7 \, \text{TeV}$ with the ATLAS Experiment | 2013 | Prof. Ivor Fleck | ATLAS |  | 
    
    
      | Gaur, Bakul | Measurement of the Reference Channel $B^\pm \rightarrow J/\psi K^\pm$ for the Rare Decay $B_s^0 \rightarrow \mu^+ \mu^-$ with the ATLAS Experiment | 2013 | Prof. Peter Buchholz | ATLAS |  | 
    
    
      | Pontz, Michael | System Tests, Initial Operation and First Data of the AMIGA Muon Detector for the Pierre Auger Observatory | 2012 | Prof. Peter Buchholz | Auger |  | 
    
    
      | Rammes, Marcus | Measurement of the $pp \rightarrow t \bar{t} \gamma$ Inclusive Cross Section in the Semi-Leptonic Decay Channel with the ATLAS Detector | 2012 | Prof. Ivor Fleck | ATLAS |  | 
    
    
      | Khoriauli, Gia | Single-Top Production t-Channel Cross Section Measurement in the Electron+Jets Final State at ATLAS with $35 \, \text{pb}^{-1}$ of Data | 2012 | Prof. Markus Cristinziani | ATLAS | CERN-THESIS-2012-151 BONN-IR-2012-04 | 
    
    
      | Abajyan, Tatevik | Measurement of the Top Quark Pair Production Cross Section with the ATLAS Detector at LHC in $pp$ Collisions at $\sqrt{s} = 7 \, \text{TeV}$ in Dilepton Final States | 2012 | Prof. Markus Cristinziani | ATLAS | BONN-IR-2012-02 CERN-THESIS-2012-069 | 
    
    
      | Sipica, Valentin | Prospects for Measuring the Branching Ratio of the Rare $B_s^0 \rightarrow \mu^+ \mu^-$ Decay with the ATLAS Experiment | 2011 | Prof. Peter Buchholz | ATLAS |  | 
    
    
      | Grybel, Kai Karsten | Prospects for Measuring the Differential High $p_\text{T}$ $b$-Jet Cross Section with the ATLAS Detector | 2010 | Prof. Peter Buchholz | ATLAS |  | 
    
    
      | Ta, Duc Bao | Study of Top-Quark Pair Cross-Section Measurement in the Dilepton Channel with the ATLAS Detector at the LHC | 2010 | Prof. Norbert Wermes | ATLAS | BONN-IR-2010-17 CERN-THESIS-2010-231 | 
    
    
      | Bäcker, Thomas | Weather Corrections for a Point Source Search at the Pierre Auger Observatory | 2010 | Prof. Ivor Fleck | Auger |  | 
    
    
      | Over, Sven | Methods for the Reconstruction of Large Scale Anisotropies of the Cosmic Ray Flux | 2009 | Prof. Peter Buchholz | KASCADE-Grande |  | 
    
    
      | Stahl, Thorsten | Prospects for Measuring the $B^{0}_{s}$ Mixing Parameter $\Delta m_{s}$ Using the Decay Channel $B^{0}_{s} \to D_{s}^{-} a_{1}^{+}$ with the ATLAS Detector | 2008 | Prof. Peter Buchholz | ATLAS | SI-HEP-2009-04 CERN-THESIS-2009-006 | 
    
    
      | Kickelbick, Dirk | The Energy Spectrum of Primary Cosmic Rays Measured with the KASCADE-Grande Experiment | 2008 | Prof. Peter Buchholz | KASCADE-Grande |  | 
    
    
      | Brüggemann, Marc | Determination of an Arrival Time Cut for the Separation of Electrons and Muons in Extensive Air Showers | 2006 | Prof. Peter Buchholz | KASCADE-Grande |  | 
    
    
      | Husemann, Ulrich | Measurement of Nuclear Effects in the Production of $J/\psi$ Mesons with the HERA–B Detector | 2005 | Prof. Peter Buchholz | HERA-B |  | 
    
    
      | Böcker, Matthias | Messung der transversalen $\Lambda$-Polarisation mit dem HERA-B-Detektor | 2004 | Prof. Peter Buchholz | HERA-B |  |