Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at s√=8 TeV
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
A search is performed for Higgs-boson-mediated flavor-changing neutral currents in the decays of top quarks. The search is based on proton-proton collision data corresponding to an integrated luminosity of 19.7 fb−1 at a center-of-mass energy of 8 TeV collected with the CMS detector at the LHC. Events in which a top quark pair is produced with one top quark decaying into a charm or up quark and a Higgs boson (H), and the other top quark decaying into a bottom quark and a W boson are selected. The Higgs boson in these events is assumed to subsequently decay into either dibosons or difermions. No significant excess is observed above the expected standard model background, and an upper limit at the 95% confidence level is set on the branching fraction ℬ(t → Hc) of 0.40% and ℬ(t → Hu) of 0.55%, where the expected upper limits are 0.43% and 0.40%, respectively. These results correspond to upper limits on the square of the flavor-changing Higgs boson Yukawa couplings |λtcH|2 < 6.9 × 10− 3 and |λtuH|2 < 9.8 × 10− 3.
Date Issued
2017-02-15
Date Acceptance
2017-02-01
Citation
Journal of High Energy Physics, 2017, 2017 (2)
ISSN
1029-8479
Publisher
Springer
Journal / Book Title
Journal of High Energy Physics
Volume
2017
Issue
2
Copyright Statement
© 2017 The Author(s). Open Access.
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0 https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0 https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000395128300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Flavour Changing Neutral Currents
Hadron-Hadron scattering (experiments)
Top physics
Higgs physics
STANDARD MODEL
WIDTH
Nuclear & Particles Physics
01 Mathematical Sciences
02 Physical Sciences
Publication Status
Published
Article Number
ARTN 079