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

Author(s)
Taylor, Frank E.
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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[superscript −1] at √s = 7 TeV and 20.3 fb[superscript −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 √λ[2 over tcH] + λ[2 over tuH] is 0.17.
Date issued
2014-06
URI
http://hdl.handle.net/1721.1/89426
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Search for Top Quark Decays t → qH with H → γγ Using the ATLAS Detector.” J. High Energ. Phys. 2014, no. 6 (June 2014). © CERN, for the benefit of the ATLAS Collaboration
Version: Final published version
ISSN
1029-8479
1126-6708

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