Search for top quark decays t → qH, with H → γγ, in √s=13 TeV pp collisions using the ATLAS detector

The ATLAS Collaboration

研究成果: Article査読

28 被引用数 (Scopus)

抄録

This article presents a search for flavour-changing neutral currents in the decay of a top quark into an up-type (q = c, u) quark and a Higgs boson, where the Higgs boson decays into two photons. The proton-proton collision data set analysed amounts to 36.1 fb−1 at s=13 TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for, where one top quark decays into qH and the other decays into bW. Both the hadronic and leptonic decay modes of the W boson are used. No significant excess is observed and an upper limit is set on the t → cH branching ratio of 2.2 × 10−3 at the 95% confidence level, while the expected limit in the absence of signal is 1.6 × 10−3. The corresponding limit on the tcH coupling is 0.090 at the 95% confidence level. The observed upper limit on the t → uH branching ratio is 2.4 × 10−3.[Figure not available: see fulltext.].

本文言語English
論文番号129
ジャーナルJournal of High Energy Physics
2017
10
DOI
出版ステータスPublished - 2017 10 1

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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