Orateur
Giorgio Mauceri
Description
The top quark (t) is unique among the other quarks for a variety of reasons, among which its high coupling with the Higgs boson (H). This high coupling constant is suspected to be possibly tied to Beyond Standard Model physics, such as the possibilty of a break in CP-simmetry. My thesis has the objective of investigating this hypothesis by studying the ttH process within the CMS collaboration at the LHC. The analysis utilizes ttH processes with multileptonic decay, up to Run 3 at 13.6 TeV. For this purpose, multiple Boosted Decision Trees were tested, utilizing various combinations of CP-sensitive variables. In parallel, I collaborate with the CNRS for the update of CMSSW in preparation for the CMS upgrade for the High-Luminosity LHC.