Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/102114
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Type: Journal article
Title: Search for H→ γγ produced in association with top quarks and constraints on the Yukawa coupling between the top quark and the Higgs boson using data taken at 7 TeV and 8 TeV with the ATLAS detector
Other Titles: Search for H-> gamma gamma produced in association with top quarks and constraints on the Yukawa coupling between the top quark and the Higgs boson using data taken at 7 TeV and 8 TeV with the ATLAS detector
Author: ATLAS Collaboration
Aad, G.
Citation: Physics Letters B, 2015; 740:222-242
Publisher: Elsevier B.V.
Issue Date: 2015
ISSN: 0370-2693
1873-2445
Statement of
Responsibility: 
G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni ... M. White ... et al. (ATLAS Collaboration)
Abstract: A search is performed for Higgs bosons produced in association with top quarks using the diphoton decay mode of the Higgs boson. Selection requirements are optimized separately for leptonic and fully hadronic final states from the top quark decays. The dataset used corresponds to an integrated luminosity of 4.5 fb−1of proton–proton collisions at a center-of-mass energy of 7TeV and 20.3 fb−1at 8TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess over the background prediction is observed and upper limits are set on the t¯tH production cross section. The observed exclusion upper limit at 95% confidence level is 6.7 times the predicted Standard Model cross section value. In addition, limits are set on the strength of the Yukawa coupling between the top quark and the Higgs boson, taking into account the dependence of the t¯tH and tH cross sections as well as the H→γγ branching fraction on the Yukawa coupling. Lower and upper limits at 95% confidence level are set at −1.3and +8.0 times the Yukawa coupling strength in the Standard Model.
Keywords: Higgs boson; diphoton decay; t¯tH; top quark; Yukawa coupling; tH
Rights: © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3.
RMID: 0030018915
DOI: 10.1016/j.physletb.2014.11.049
Appears in Collections:Physics publications

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