Etude de la réponse du calorimètre électromagnatique et recherche d'un boson de Higgs de 300 GeV/c2 dans le canal q q H -> q q W W -> q q l nu j j dans l'expérience ATLAS au LHC

Abstract : The research of the Higgs boson implies a good uniformity of the response of the electromagnetic calorimeter of ATLAS for the study of its leptonic and photonic channels.


In the first part of this thesis, I have developped a reliable monitoring tool for checking the quality of the data taking during these tests, shown that the procedure of production of the coefficients of optimal filtering comprises an artifact which influences the uniformity of the response in energy of a module and contributed to the installation of an algorithm of replacement of the missing coefficients.


The second part relates to the study of the channel q q H -> q q W W -> q q l nu j j for a Higgs of 300 GeV/c2. The result reported in the TDR did not allow to exploite this channel for a discovery because the distributions of the signal and backgrounds merged. Thanks to a new more global approach associated with a new cut on the mass of the Wj system and a relaxation of certain cuts, I have shown that this channel allows the discovery of the Higgs boson as well as the measurement of coupling H -> WW.
Document type :
Theses
High Energy Physics - Experiment. Université de Savoie, 2003. French


https://tel.archives-ouvertes.fr/tel-00003462
Contributor : Base Des Publications de L'IN2P3 <>
Submitted on : Thursday, October 2, 2003 - 3:39:18 PM
Last modification on : Friday, December 23, 2005 - 1:24:55 PM

Identifiers

  • HAL Id : tel-00003462, version 1

Collections

LAPP | UGA

Citation

Christophe Le Maner. Etude de la réponse du calorimètre électromagnatique et recherche d'un boson de Higgs de 300 GeV/c2 dans le canal q q H -> q q W W -> q q l nu j j dans l'expérience ATLAS au LHC. High Energy Physics - Experiment. Université de Savoie, 2003. French. <tel-00003462>

Export

Share

Metrics

Consultation de
la notice

183

Téléchargement du document

22