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

Aad, G.; Abbott, B.; Abdallah, J.; Böhm, Jan; Chudoba, Jiří; Havránek, Miroslav; Hejbal, Jiří; Jakoubek, Tomáš; Kepka, Oldřich; Kupčo, Alexander; Kůs, Vlastimil; Lokajíček, Miloš; Lysák, Roman; Marčišovský, Michal; Mikeštíková, Marcela; Myška, Miroslav; Němeček, Stanislav; Šícho, Petr; Staroba, Pavel; Svatoš, Michal; Taševský, Marek; Vrba, Václav

doi:https://dx.doi.org/10.1007/JHEP06(2014)008

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

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SYSNO ASEP	0434862
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Search for top quark decays t→qH with H→γγ using the ATLAS detector
Author(s)	Aad, G. (DE) Abbott, B. (US) Abdallah, J. (TW) Böhm, Jan (FZU-D) Chudoba, Jiří (FZU-D)_{RID, ORCID} Havránek, Miroslav (FZU-D)_RID Hejbal, Jiří (FZU-D)_{RID, ORCID} Jakoubek, Tomáš (FZU-D)_{RID, ORCID} Kepka, Oldřich (FZU-D)_{RID, ORCID} Kupčo, Alexander (FZU-D)_{RID, ORCID} Kůs, Vlastimil (FZU-D)_RID Lokajíček, Miloš (FZU-D)_{RID, ORCID} Lysák, Roman (FZU-D)_{RID, ORCID} Marčišovský, Michal (FZU-D)_{RID, ORCID} Mikeštíková, Marcela (FZU-D)_{RID, ORCID} Myška, Miroslav (FZU-D) Němeček, Stanislav (FZU-D)_{RID, ORCID} Šícho, Petr (FZU-D)_{RID, ORCID} Staroba, Pavel (FZU-D)_{RID, ORCID} Svatoš, Michal (FZU-D)_{RID, ORCID} Taševský, Marek (FZU-D)_{RID, ORCID} Vrba, Václav (FZU-D)_{RID, ORCID}
Number of authors	2891
Source Title	Journal of High Energy Physics. - : Springer - ISSN 1029-8479 Roč. 2014, č. 6 (2014), s. 1-40
Number of pages	40 s.
Language	eng - English
Country	US - United States
Keywords	ATLAS ; neutral current ; flavor changing ; top ; branching ratio ; upper limit ; CERN LHC Coll
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LG13009 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	FZU-D - RVO:68378271
UT WOS	000337167700001
EID SCOPUS	84904444313
DOI	https://doi.org/10.1007/JHEP06(2014)008
Annotation	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 s√ = 7 /tev/ and 20.3 fb−1 at s√ = 8 /tev/ 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 λ2tcH+λ2tuH−√ is 0.17.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2015

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