CERN Accelerating science

CERN Theses

Search for di-Higgs production and measurement of the Higgs boson self-coupling in the final state with a pair of b quarks and a pair of tau leptons with the ATLAS detector at the LHC, Perspectives on the measurement of the Higgs boson mass and the electron-positron to ZH cross-section at the Future Circular Collider / Li, Ang
After the discovery of the Higgs boson in 2012 by the ATLAS and CMS collaborations at the Large Hadron Collider (LHC), precision measurements of the Higgs boson mass and couplings have taken center stage, serving both the validation of the Standard Model (SM) and the exploration for new physics Be [...]
CERN-THESIS-2024-035 - 320 p.

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Test with Modules for the ATLAS ITk Pixel Detector / Grun, Niklas
Currently, the preparation for the upgrade of the High Luminosity Large Hadron Collider (HL-LHC) is ongoing [...]
CERN-THESIS-2024-034 II.Physik-UniGö-BSc-2023/09. - 56 p.

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A search for heavy neutral gauge bosons and dark-sector particles with the ATLAS detector / Haaland, Even Simonsen
The Standard Model of particle physics is currently the best theory we have for describing the most fundamental particles and interactions in Nature, and its validity is proven over a large range of energies [...]
CERN-THESIS-2023-383 - 264 p.

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Evaluation of Different Methods for Runtime Optimization of Longitudinal Phase Space Tomography / Abreu Figueiredo, Bernardo
In order to measure the parameters, and therefore the quality, of the particle beam in the CERN synchrotrons, various methods are used for beam diagnostics [...]
CERN-THESIS-2024-033 - 116 p.

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Corrections of high-order nonlinearities in the LHC and High-Luminosity LHC beam optics / Dilly, Joschua Werner
The impact of high-order nonlinear magnetic field errors on the performance of the Large Hadron Collider (LHC) and its planned High-Luminosity upgrade, the HL-LHC, has been extensively studied [...]
CERN-THESIS-2023-382 DOI:10.18452/28273. - Berlin : Humboldt-Universität zu Berlin, 2024-03-01. - 233 p.

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First model independent measurement of the CKM angle $\gamma$ using $B^{\pm} \rightarrow DK^{\pm}$ and $B^{\pm} \rightarrow D\pi^{\pm}$, $D \rightarrow 2\pi^{+}2\pi^{-}$ decays at LHCb / Westhenry, Benedict Donald C
The measurement presented in this thesis is that of the Cabibbo-Kobayashi-Maskawa (CKM) angle $\gamma$ using $B^{\pm} \rightarrow D(\rightarrow 2\pi^{+}2\pi^{-})K^{\pm}$ and $B^{\pm} \rightarrow D(\rightarrow 2\pi^{+}2\pi^{-})\pi^{\pm}$ signal decays, where $D$ represents the superposition of $D^{0} [...]
CERN-THESIS-2023-381 - 146 p.

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A Precise Measurement of the Lifetime of $B^{0}_{d}$-mesons, Measurement of $CP$-violation Parameters of $B_{s}^{0}$-mesons, the ATLAS Experiment at the LHC, and Development of Silicon Detectors for Future Particle Physics Experiments / Narayanan, Easwar Anand
A series of connected research projects has been carried out for the purpose of seeking physics phenomena beyond the Standard Model [...]
CERN-THESIS-2024-032 - 355 p.

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$b \to u$ / Butter, Jordy
Scientists worldwide have dedicated themselves to understanding the fundamental nature of the universe, leading to the development of the Standard Model [...]
CERN-THESIS-2023-379 - 182 p.

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Search for the critical point of strongly interacting matter (Proton intermittency analysis by NA61/SHINE at CERN SPS) / Adhikary, Haradhan
The existence and location of the critical point of strongly interacting matter are objects of both experimental and theoretical studies [...]
CERN-THESIS-2023-378 - 145 p.

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Measurement of the Branching Fraction of the Decay $\boldsymbol{B^{+}\rightarrow K^{+}\mu^{+}\mu^{-}}$ at LHCb and Study on Mighty Tracker for Future LHCb Upgrade / Denysenko, Vadym
This thesis reports the branching fraction measurement of the rare decay $B^{+}\rightarrow K^{+}\mu^{+}\mu^{-}$ in the di-lepton invariant mass, $q = m(\mu^+ \mu^-)$, region above narrow $\mathrm{c}\overline{\mathrm{c}}$ resonances, $J/\psi$ and $\psi(2S)$ [...]
CERN-THESIS-2024-030 - 145 p.

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CERN Doctoral Student Program (761)
CERN Technical Student Program (244)