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
Entidad
UAM. Departamento de Física TeóricaEditor
Elsevier B.V.Fecha de edición
2015-01-05Cita
10.1016/j.physletb.2014.11.049
Physics Letters B: Nuclear, Elementary particle and High-Energy Physics740 (2015): 222-242
ISSN
0370-2693 (print); 1873-2445 (online)DOI
10.1016/j.physletb.2014.11.049Financiado por
We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET, ERC and NSRF, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT and NSRF, Greece; ISF, MINERVA, GIF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; BRF and RCN, Norway; MNiSW and NCN, Poland; GRICES and FCT, Portugal; MNE/IFA, Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwideProyecto
info:eu-repo/grantAgreement/EC/FP7/246806Versión del editor
http://dx.doi.org/10.1016/j.physletb.2014.11.049Materias
Higgs boson; Diphoton decay; ttH; Top quark; Yukawa coupling; tH; FísicaDerechos
© 2014 The AuthorsResumen
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 ttH¯ 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 ttH¯ 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 Mode
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Google Scholar:Terrón Cuadrado, Juan
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Peso Malagón, José del
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Glasman Kuguel, Claudia Beatriz
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Maroñas Molano, Juan
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ATLAS Collaboration
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Aad, G.
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Arnal, V.
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Cantero, J.
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De la Torre, H.
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Llorente Merino, J.
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