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Theses

ttH,H->WW analysis at ATLAS, LHC and Very Low Energy electron studies of 2004 combined test beam

Abstract : Using ATLAS Computing System Commissioning Monte Carlo(MC) full simulation data, this thesis studies the feasibility of measuring top-quark Yukawa Coupling in 30fb(-1) integrated luminosity of the ttH;H->WW(*) channel, within the Higgs mass range from 120 to 200 GeV. The trigger, pileup effects and all possible systematic uncertainties are studied. For a Higgs mass of 160 GeV, with the detailed systematics uncertainties, the signal signifficance is shown to exceed 2 sigma by combining two leptons and three leptons final states together. The combined branching ratio of sigma_ttH*BR(H->WW(*)) can reach an accuracy of 47%. This thesis also presents a study of the linearity of VLE electron from 2004 ATLAS Combined Test Beam data, and MC study shows a possible improvement by using 5*5 multiple seed clustering.
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https://tel.archives-ouvertes.fr/tel-00443806
Contributor : Huaqiao Zhang <>
Submitted on : Monday, January 4, 2010 - 2:55:36 PM
Last modification on : Thursday, January 18, 2018 - 2:21:05 AM
Long-term archiving on: : Thursday, June 17, 2010 - 8:30:37 PM

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  • HAL Id : tel-00443806, version 1

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Huaqiao Zhang. ttH,H->WW analysis at ATLAS, LHC and Very Low Energy electron studies of 2004 combined test beam. High Energy Physics - Experiment [hep-ex]. Université de la Méditerranée - Aix-Marseille II; Institute of High Energy Physics, 2008. English. ⟨tel-00443806⟩

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