Searches for heavy Higgs bosons in two-Higgs-doublet models and for t→ch decay using multilepton and diphoton final states in pp collisions at 8 TeV

Abstract : Searches are presented for heavy scalar (H) and pseudoscalar (A) Higgs bosons posited in the two doublet model (2HDM) extensions of the standard model (SM). These searches are based on a data sample of pp collisions collected with the CMS experiment at the LHC at a center-of-mass energy of sqrt(s) = 8 TeV and corresponding to an integrated luminosity of 19.5 inverse femtobarns. The decays H to hh and A to Zh, where h denotes an SM-like Higgs boson, lead to events with three or more isolated charged leptons or with a photon pair accompanied by one or more isolated leptons. The search results are presented in terms of the H and A production cross sections times branching fractions and are further interpreted in terms of 2HDM parameters. We place 95% CL cross section upper limits of approximately 7 pb on sigma B for H to hh and 2 pb for A to Zh. Also presented are the results of a search for the rare decay of the top quark that results in a charm quark and an SM Higgs boson, t to ch, the existence of which would indicate a nonzero flavor-changing Yukawa coupling of the top quark to the Higgs boson. We place a 95% CL upper limit of 0.56% on B(t to ch).
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Article dans une revue
Physical Review D, American Physical Society, 2014, 90, pp.112013
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http://hal.in2p3.fr/in2p3-01074944
Contributeur : Dominique Girod <>
Soumis le : jeudi 16 octobre 2014 - 10:31:02
Dernière modification le : jeudi 10 mai 2018 - 02:00:51

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  • HAL Id : in2p3-01074944, version 1
  • ARXIV : 1410.2751

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V. Khachatryan, S. Viret, F. Couderc, H. Xiao, M. Dejardin, et al.. Searches for heavy Higgs bosons in two-Higgs-doublet models and for t→ch decay using multilepton and diphoton final states in pp collisions at 8 TeV. Physical Review D, American Physical Society, 2014, 90, pp.112013. 〈in2p3-01074944〉

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