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

Allison, Lee and Barton, Adam and Borissov, Guennadi and Bouhova-Thacker, Eva and Chilingarov, Alexandre and Dearnaley, William and Fox, Harald and Grimm, Kathryn and Henderson, Robert and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Maddocks, Harvey and Smizanska, Maria and Walder, James (2014) Search for top quark decays t → qH with H → γγ using the ATLAS detector. Journal of High Energy Physics, 2014 (6). ISSN 1029-8479

[img]
Preview
PDF (art%3A10.1007%2FJHEP06%282014%29008)
art_3A10.1007_2FJHEP06_282014_29008.pdf - Published Version
Available under License Creative Commons Attribution.

Download (981kB)

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 s√ = 7TeV and 20.3fb−1 at s√ = 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 λ2tcH+λ2tuH−−−−−−−−−√ is 0.17.

Item Type: Journal Article
Journal or Publication Title: Journal of High Energy Physics
Additional Information: JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 69980
Deposited By: ep_importer_pure
Deposited On: 11 Jul 2014 08:59
Refereed?: Yes
Published?: Published
Last Modified: 22 Feb 2020 02:36
URI: https://eprints.lancs.ac.uk/id/eprint/69980

Actions (login required)

View Item View Item