Article
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
Physics Letters B, Elsevier, ISSN 1873-2445
Volume 740, 2015
DOI:10.1016/j.physletb.2014.11.049, Dimensions: pub.1038900558,
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- (1) Center for Particle Physics of Marseilles, grid.470046.1
- (2) University of Oklahoma, grid.266900.b
- (3) Institute of Physics, Academia Sinica, grid.482252.b
- (4) Laboratoire de l'Accélérateur Linéaire, grid.462450.1
- (5) Institute of Physics, grid.435347.2
- (6) National Institute for Subatomic Physics, grid.420012.5
- (7) Oklahoma State University, grid.65519.3e
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- (14) International Centre for Theoretical Physics, grid.419330.c
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- (20) Rutherford Appleton Laboratory, grid.76978.37
- (21) University of Belgrade, grid.7149.b
- (22) Departamento de Fisica Teorica y del Cosmos and CAFPE, Universidad de Granada, Granada (Spain), Portugal
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Description
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−1 of proton–proton collisions at a center-of-mass energy of 7 TeV and 20.3 fb−1 at 8 TeV 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 tt¯H 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 tt¯H 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 −1.3 and +8.0 times the Yukawa coupling strength in the Standard Model.
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- Ministry of Science and Technology of the People's Republic of China
- Australian Research Council
- Chinese Academy of Sciences
- Japan Society for the Promotion of Science
- National Research Council Canada
- Slovenian Research Agency
- Science and Technology Facilities Council
- Colciencias
- German Research Foundation
- Leverhulme Trust
- Agencia Nacional de Promoción Científica y Tecnológica
- French National Centre for Scientific Research
- European Research Council
- São Paulo Research Foundation
- Ministry of Economy, Industry and Competitiveness
- Federal Ministry of Education and Research
- Brain Research Foundation
- Brookhaven National Laboratory
- Rosatom (Russia)
- European Commission
- Dutch Research Council
- Israeli Centers for Research Excellence
- FWF Austrian Science Fund
- Ministry of Education, Science and Sport
- Israel Science Foundation
- Ministry of Education, Culture, Sports, Science and Technology
- National Natural Science Foundation of China
- Ministry of Education Youth and Sports
- National Institute for Nuclear Physics
- Joint Institute for Nuclear Research
- Semiconductor Research Corporation
- Ministry of Science and Higher Education
- Comisión Nacional de Investigación Científica y Tecnológica
- Atomic Energy and Alternative Energies Commission
- National Science Center
- Helmholtz Association of German Research Centres
- Natural Sciences and Engineering Research Council
- Foundation for Science and Technology
- Alexander von Humboldt Foundation
- Swiss National Science Foundation
- Turkish Atomic Energy Authority
- General Secretariat for Research and Technology
- Ministry of Science and Technology
- Federal Ministry of Science, Research and Economics
- United States Department of Energy
- Royal Society
- National Council for Scientific and Technological Development
- Canada Foundation for Innovation
- Canadian Armed Forces
- Danish National Research Foundation
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