CERN Accelerating science

LHCb Theses

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Electron track reconstruction studies and improvement for LHCb‘s real-time analysis trigger / Cetin, Furkan Selim
This thesis presents an improved neural-network-based Track-Matching algorithm to recover and reconstruct electron tracks more efficiently in LHCb’s real-time analysis trigger [...]
CERN-THESIS-2024-042 - 76 p.

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Study of the $C\!P$ violating phase $\gamma$ at the LHCb experiment / Zhang, Shunan
Charge conjugation-Parity ($C\!P$) violation is one of the prerequisites of the matter-antimatter asymmetry in the universe [...]
CERN-THESIS-2023-387 -

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zfit: scalable model fitting in Python using TensorFlow / Eschle, Jonas
Fitting a model to data is an essential part in most High Energy Physics analyses [...]
CERN-THESIS-2019-447 - 72 p.

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Studies of $B^+ \rightarrow K^+ \pi^+ \pi^- e^+ e^-$ decays at LHCb / Eschle, Jonas
Studies of the rare decay $B^+ \rightarrow K^+ \pi^+ \pi^- e^+ e^-$ are performed using proton-proton collision data, corresponding to an integrated luminosity of about 1 fb$^{−1}$ , collected by the LHCb experiment at the centre-of-mass energy of 7 TeV [...]
CERN-THESIS-2017-500 - 38 p.

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Studies on $R_K$ with Large Dilepton Invariant-Mass, $\\$ Scalable Pythonic Fitting,$\\$ and Online Event Interpretation with GNNs at LHCb / Eschle, Jonas
The Standard Model of particle physics is the established theory describing nature's phenomena involving the most fundamental particles [...]
arXiv:2402.12622 ; CERN-THESIS-2024-036 - 2024-01-24. - 269 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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$b \to u$ / 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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