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Title: Search for heavy neutral MSSM Higgs bosons in the di-tau final state with the ATLAS detector
Author: Jelinskas, Adomas
ISNI:       0000 0004 8510 0616
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 2019
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A search for heavy neutral Minimal Supersymmetric Standard Model Higgs bosons, CP-even H and CP-odd A, is presented. The analysis uses 36:1 fb-1 data set collected in 2015 and 2016 with the ATLAS detector during Run 2 of the LHC at ps = 13TeV. Higgs bosons were searched for in the decay channel to a pair of tau leptons where one tau decays leptonically and another tau decays hadronically. No significant excess of events above the expected background from Standard Model processes was observed. Upper limits on cross section times branching ratio is set at a 95% Confidence Level for two production modes of the Higgs bosons: gluongluon fusion and b-associated production. The results are also interpreted in mhmood- and hMSSM benchmark scenarios of the MSSM. The analysis takes advantage of Higgs boson to down-type fermion coupling enhancement at high values of the tan β parameter of the MSSM and therefore is capable of excluding high tan β region in the MA -tan β parameter space.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QC Physics