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LHCb Theses

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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$b \to u$ / 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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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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Boosting the discovery potential of LHCb by developing a new search for diphoton resonances and an alternative muon reconstruction technique using GPUs / Casais Vidal, Adrian
The main part of this thesis is devoted to describe a search for a diphoton resonance in the $[5,20]~$ GeV mass region with $pp$ collision data taken with the LHCb experiment during 2018 at an energy $\sqrt{s}= 13~ $TeV [...]
CERN-THESIS-2023-364 - 163 p.

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Search for the lepton flavour violating decays $B^{0} \to e^{\pm}\mu^{\mp}$ and $B^0_s \to e^{\pm}\mu^{\mp}~~~~~~$ with LHCb Run 2 data / Schulte, Sebastian
A large variety of new physics models suggest that the rates for lepton flavour violating $b$-hadron decays may be much higher than predicted in the Standard Model, which leads to a high interest in the search for such decays [...]
CERN-THESIS-2023-362 - 197 p.

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Angular analysis of $\Lambda^0 _b \to \Lambda(1520)\mu^+\mu^-$ decays with the LHCb detector / Volle, Felicia
New Physics (NP) searches via $b \to s \ell^+\ell^-$ transitions are powerful methods since NP contributions could cause sizeable deviations from the Standard Model (SM) predictions [...]
CERN-THESIS-2023-359 - 376 p.

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Calibration and performance studies of the readout ASIC for the LHCb SciFi Tracker / Witola, Lukas
The LHCb experiment will perform a major upgrade of the detector during the LHC’s Long Shutdown 2 from 2019 to 2020 [...]
CERN-THESIS-2019-446 - 71 p.

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Pentaquark Search in $\Lambda_b^0 \to \Lambda_c^+\bar{D}^{*0}K^-$ Decays and LHCb Open Data Release / Sarpis, Mindaugas
This PhD thesis reports results of the physics analysis focused on the search of pentaquarks in $\Lambda_b^0 \to \Lambda_c^+\bar{D}^{*0}K^-$ decays [...]
CERN-THESIS-2023-345 - 212 p.

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Design of a Separation System to Recover N-decafluorobutane from a Gas Mixture / Galassi, Damiano
In recent years, CERN has faced a significant environmental and economic challenge due to the extensive use of gas mixtures with a high Global Warming Potential [...]
CERN-THESIS-2023-340 - 156 p.

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Extending the physics reach of the fixed-target programme at the LHCb experiment / Lucarelli, Chiara
Exploiting the forward geometry of its spectrometer, along with its excellent tracking and particle identification performance, the LHCb experiment at CERN has been conducting a pioneering fixed-target physics programme since 2015, studying collisions between the LHC beams and injected gaseous targe [...]
CERN-THESIS-2023-338 - 193 p.

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