Measurement of Higgs Boson Production in the Diphoton Decay Channel in pp Collisions at Center-Of-Mass Energies of 7 and 8 TeV with the ATLAS Detector

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Measurement of Higgs Boson Production in the Diphoton Decay Channel in pp Collisions at Center-Of-Mass Energies of 7 and 8 TeV with the ATLAS Detector

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title Measurement of Higgs Boson Production in the Diphoton Decay Channel in pp Collisions at Center-Of-Mass Energies of 7 and 8 TeV with the ATLAS Detector
contributor.author Aad, G.
contributor.author Abbott, B.
contributor.author Abdallah, J.
contributor.author Abdel Khalek, S.
contributor.author Abdinov, O.
contributor.author Aben, R.
contributor.author Abi, B.
contributor.author Izen, Joseph M.
contributor.author Leyton, Michael
contributor.author Lou, Xinchou
contributor.author Namasivayam, Harisankar
contributor.author Reeves, Kendall
contributor.author ATLAS Collaboration
contributor.utdAuthor Izen, Joseph M.
contributor.utdAuthor Leyton, Michael
contributor.utdAuthor Namasivayam, Harisankar
contributor.utdAuthor Reeves, Kendall
contributor.utdAuthor Lou, Xinchou
contributor.VIAF 250674117 (Izen, JM)
contributor.VIAF 250674117 (Izen, JM)
contributor.ORCID 0000-0003-0867-2189 (Lou, X)
description.abstract A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 4.5 fb⁻¹ of proton-proton collisions data at √s = 7 TeV and 20.3 fb⁻¹ at √s = 8 TeV collected by the ATLAS detector at the Large Hadron Collider. The number of observed Higgs boson decays to diphotons divided by the corresponding Standard Model prediction, called the signal strength, is found to be μ=1.17 ± 0.27 at the value of the Higgs boson mass measured by ATLAS, m_H = 125.4 GeV. The analysis is optimized to measure the signal strengths for individual Higgs boson production processes at this value of m_H. They are found to be μ_{ggF} = 1.32 ± 0.38, μ_{VBF} = 0.8 ± 0.7, μ_{WH} = 1.0 ± 1.6, μ_{ZH} = 0.1{−0.1} ^{+3.7}, and μ_{tt̅H} = 1.6 {−1.8} ^{+ 2.7} , for Higgs boson production through gluon fusion, vector-boson fusion, and in association with a W or Z boson or a top-quark pair, respectively. Compared with the previously published ATLAS analysis, the results reported here also benefit from a new energy calibration procedure for photons and the subsequent reduction of the systematic uncertainty on the diphoton mass resolution. No significant deviations from the predictions of the Standard Model are found.
identifier.issn 1550-7998
identifier.uri http://hdl.handle.net/10735.1/4301
identifier.bibliographicCitation Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2014. "Measurement of Higgs boson production in the diphoton decay channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector." Physical Review D - Particles, Fields, Gravitation and Cosmology 90(11), doi:10.1103/PhysRevD.90.112015
identifier.volume 90
identifier.issue 11
subject W bosons
subject Z bosons
subject Higgs bosons
subject Protons
date.created 2014-12-24
date.issued 2014-12-24
publisher American Physical Society
relation.uri http://dx.doi.org/10.1103/PhysRevD.90.112015
rights CC BY 3.0 (Attribution)
rights © 2014 CERN, for the ATLAS Collaboration
rights.uri http://creativecommons.org/licenses/by/3.0/
language.iso en_US
source Physical Review D - Particles, Fields, Gravitation and Cosmology

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CC BY 3.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 3.0 (Attribution)