Publications related to Latest LHCb results

Search for the lepton flavour violating decays B0 -> emu and B0s -> emu with LHCb Run 2 data

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. This thesis presents the sear ...

EPFL2024

Testing lepton flavour universality in $B^+\to K^+\pi^+\pi^-\ell^+\ell^-$ decays with LHCb

Sara Celani

This PhD thesis aims at testing one of the fundamental properties of the Standard Model (SM) of particle physics: the lepton flavour universality (LFU), which states that

W

and

Z

bosons are equally coupled to the three lepton generations. In this work, ...

EPFL2023

Search for Heavy Neutral Leptons with LHCb

Serhii Cholak

This thesis presents a search for a beyond the Standard Model (SM) heavy neutral lepton (HNL), which does not interact via any of the SM interactions. This hypothetical particle has been proposed by multiple theories as an extension to the SM, and it could ...

EPFL2023

Measurement of the B+ -> rho0 mu+ nu differential branching fraction

Veronica Sølund Kirsebom

The tension between different determinations of the CKM matrix element Vub using measurements of either exclusive or inclusive semileptonic decays represents a long-standing puzzle in flavour physics. To resolve this, measurements of new exclusive channels ...

EPFL2023

Search for lepton flavour violation in B meson decays at LHCb

Lino Ferreira Lopes

The current limitations of the standard model of elementary particle physics drive the search for phenomenons forbidden within that framework with the goal to unveil a more universal theory. This thesis presents the search for two lepton flavour violating ...

EPFL2021

A parametrized Kalman filter for fast track fitting at LHCb

Michel De Cian

We present an alternative implementation of the Kalman filter employed for track fitting within the LHCb experiment. It uses simple parametrizations for the extrapolation of particle trajectories in the field of the LHCb dipole magnet and for the effects o ...

2021

Amplitude analysis for the measurement of the photon polarisation in B rightarrow K pi pi gamma decays

Violaine Bellée

This work proposes a method to measure the photon polarisation in

B^+ \rightarrow K^+ \pi^- \pi^+ \gamma

decays and prepares the necessary elements for this measurement using the data sets collected by the LHCb experiment at CERN in

2011

,

2012

, $2016 ...

EPFL2020

Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider

Yi Zhang, Jia Liu, Jessica Prisciandaro, Federico Leo Redi, Marco Drewes, Marco Trovato, Xiao Wang, Victor Coco, Giorgia Rauco, Ennio Salvioni, Manfredi Ronzani, Patrick Foldenauer, Ahmed Hammad

Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these long-lived particles (LLPs) can decay far ...

IOP PUBLISHING LTD2020

Exploring beyond the Standard Model: the Heavy and the Dark

Kin Shanho Eliaou Mimouni

Physics beyond the Standard Model can appear as new particles too heavy to be produced in experiments (the energy frontier) or interacting too weakly to be seen in our measurements (the intensity frontier). In the first part of this thesis, we study two ...

EPFL2019

Sensitivity of the SHiP experiment to Heavy Neutral Leptons

Lesya Shchutska, Aurelio Bay, Guido Haefeli, Elena Graverini, Alexey Boyarsky, Sun Hee Kim, Federico Leo Redi, Maria Elena Stramaglia, Oleg Ruchayskiy, Nikolaos Charitonidis, Inar Timiryasov, Jean-Loup Tastet, Ekaterina Kuznetsova, Hans Dijkstra, Anton Petrov, Sergei Smirnov

Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These particles can, among other things, explain the origin of neutrino masses, generate the observed matter-antimatter asymmetry in the Universe an ...

Springer2019

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Search for the lepton flavour violating decays B0 -> emu and B0s -> emu with LHCb Run 2 data

Testing lepton flavour universality in $B^+\to K^+\pi^+\pi^-\ell^+\ell^-$ decays with LHCb

Search for Heavy Neutral Leptons with LHCb

Measurement of the B+ -> rho0 mu+ nu differential branching fraction

Search for lepton flavour violation in B meson decays at LHCb

A parametrized Kalman filter for fast track fitting at LHCb

Amplitude analysis for the measurement of the photon polarisation in B rightarrow K pi pi gamma decays

Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider

Exploring beyond the Standard Model: the Heavy and the Dark

Sensitivity of the SHiP experiment to Heavy Neutral Leptons

Search for the lepton flavour violating decays B0 -> emu and B0s -> emu with LHCb Run 2 data

Testing lepton flavour universality in $B^+\to K^+\pi^+\pi^-\ell^+\ell^-$ decays with LHCb

Search for Heavy Neutral Leptons with LHCb

A parametrized Kalman filter for fast track fitting at LHCb

Amplitude analysis for the measurement of the photon polarisation in B rightarrow K pi pi gamma decays

Measurement of the B+ -> rho0 mu+ nu differential branching fraction

Search for lepton flavour violation in B meson decays at LHCb

Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider

Exploring beyond the Standard Model: the Heavy and the Dark

Sensitivity of the SHiP experiment to Heavy Neutral Leptons