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Title: Search for a light charged Higgs boson in the decay channel H^+ --> c¯s using the ATLAS detector
Author: Trifis, Omran
Awarding Body: University of Manchester
Current Institution: University of Manchester
Date of Award: 2013
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A search for a light charged Higgs boson (H^±) decaying into two jets (c¯s) using pp collisions at s = sqrt(7 TeV) is presented. A data sample corresponding to an integrated luminosity of 4.7 fb^−1 recorded by the ATLAS detector in 2011 has been analysed. The search is performed in the semi-leptonic t¯t channel, where one of the top quarks decays via t --> bH^±. The other top quark decays to bW, where the W boson decays to a lepton (e/μ) and a neutrino. The search is based on the invariant mass distribution of the two light jets in the final state as the discriminating variable. With no observation of an H^± signal, 95% confidence level(CL) upper limits are set on the decay branching ratio of top quarks to charged Higgs bosons. These limits are between 5% and 1% for charged Higgs boson masses between 90 and 150 GeV, and can be considered as model-independent limits on the decay branching ratio of top quarks to any charged boson beyond the Standard Model.
Supervisor: Loebinger, Frederick Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Physics ; Higgs boson