Search for top quark decays t → qH with H → γγ using the ATLAS detector

The ATLAS collaboration

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58 Scopus citations

Abstract

A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type (c, u) quark and a Higgs boson, where the Higgs boson decays to two photons. The proton-proton collision data set used corresponds to 4.7 fb-1 at √ = 7TeV and 20.3fb-1 at √ = 8TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for in which one top quark decays to qH and the other decays to bW. Both the hadronic and the leptonic decay modes of the W boson are used. No significant signal is observed and an upper limit is set on the t → qH branching ratio of 0.79 at the 95% confidence level. The corresponding limit on the tqH coupling combination λtcH2 + λtuH2 is 0.17.

Original languageEnglish
Article number008
JournalJournal of High Energy Physics
Volume2014
Issue number6
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Hadron-Hadron Scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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