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Habilitation à diriger des recherches

Search for Higgs bosons and for Supersymmetric particles at particle collider experiments

Abstract : The corner stone of the Standard Model (SM) of Particle Physics is the Higgs mechanism. It explains how the bosons W, Z and H acquire a mass via weak interactions. In addition it explains how the charged fermions also acquire a mass through Yukawa interactions. And on top of this, it regularizes the scattering of longitudinal W and Z bosons at high energy. The discovery of a Higgs boson by the ATLAS and the CMS collaborations in 2012 marked the culminating success of the SM at explaining most of the known phenomena. However a few other phenomena such as the Dark Matter and the Dark energy cannot be explained by the SM particles. What's more, the SM leaves several open questions such as a quest for a quantum theory for gravity, the naturalness in the Higgs sector, a possible Grand Unification,... The common thread in topics presented in this habilitation thesis is the search for manifestations of a TeV scale supersymmetric (SUSY) extension of the Standard Model at particle collider experiments. Among the predictions of such models is the presence of a light Higgs boson as well as the presence of SUSY partners of the SM particles. In the first part of this document I remind the structure of the SM and the MSSM, its minimal supersymmetric extension. In the second part I relate searches for Higgs bosons to which I participated in the L3 experiment for the LEP Run2. In the third part I report a search for SUSY partciles at the TEVATRON Run2 using the D0 detector. In the fourth part I report on recent works concentrating on the ATLAS experiment at the LHC Run1. Firstly, I report on an analysis that uses the Higgs boson as a probe to search for SUSY, secondly I present a new method that I designed for some indirect mass measurements using their production integral charge asymmetry at the LHC.
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https://hal.archives-ouvertes.fr/tel-01220656
Contributor : Steve Muanza <>
Submitted on : Thursday, November 12, 2015 - 11:13:54 AM
Last modification on : Thursday, January 18, 2018 - 1:55:11 AM
Document(s) archivé(s) le : Friday, February 12, 2016 - 9:28:25 PM

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  • HAL Id : tel-01220656, version 2

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Steve Muanza. Search for Higgs bosons and for Supersymmetric particles at particle collider experiments. High Energy Physics - Experiment [hep-ex]. Aix-Marseille Université, 2015. ⟨tel-01220656v2⟩

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