Abstract The Large Hadron Collider (LHC) at CERN is built to collide intense proton beams
with an unprecedented energy of 7 TeV. The design stored energy per beam of 362 MJ …

Since the first transverse instability observed in 2010, many studies have been performed on
both measurement and simulation sides and several lessons have been learned. In a …

Abstract The CERN Large Hadron Collider (LHC) stores and collides proton and $^{208} $
Pb $^{82+} $ beams of unprecedented energy and intensity. Thousands of superconducting …

The foreseen upgrade of the large hadron collider (LHC) for high-luminosity operation will
incorporate a new generation of high field superconducting magnets. In particular, the …

A direct search for charged lepton-flavour violation in top-quark decays is presented. The
data analysed correspond to $79.8\\text {fb}^{-1} $ of proton--proton collisions at a centre-of …

In July 2012, the ATLAS and CMS experiments announced the discovery of a new particle,
with a mass about $125 $ GeV, compatible with the Standard Model Higgs boson. In order to …

Measurements of angular properties of top-quarks constitute stringent tests of the Standard
Model, probe physics beyond it, and even reveal underlying quantum information …

In high energy accelerators operating with positively charged particles, photoemission and
secondary emission can give rise to an exponential electron multiplication within the beam …

This thesis presents the search for the Standard Model Higgs boson produced in association
with a pair of top-quarks (ttH). The analysis uses a 36.1 1/fb dataset of proton-proton …

Within the scope of this thesis, the cross section of the associate production of a W and a Z
boson is presented and the polarization will measured for the first time in a diboson channel …