Observation and Measurement of Higgs Boson Decays to WW* with the ATLAS Detector

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dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorAbdel Khalek, S.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorAbi, B.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.authorMeirose, Bernharden_US
dc.contributor.authorNamasivayam, Harisankaren_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLeyton, Michaelen_US
dc.contributor.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.date.accessioned2016-12-16T22:52:20Z
dc.date.available2016-12-16T22:52:20Z
dc.date.created2015-07-16en_US
dc.date.issued2015-07-16en_US
dc.description.abstractWe report the observation of Higgs boson decays to WW* based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of 25 fb⁻¹ from √s̅ = 7 and 8 TeV pp collisions recorded by the ATLAS detector at the LHC. For a Higgs boson mass of 125.36 GeV, the ratio of the measured value to the expected value of the total production cross section times branching fraction is 1.09{-0.15}^{+0.16}(stat){-0.14}^{0.17}(syst). The corresponding ratios for the gluon fusion and vector-boson fusion production mechanisms are 1.02 ± 0.19(stat){-018}^{+0.22}(syst) and 1.27{-0.40}^{+0.44}(stat){-0.21}^{+0.30}(syst), respectively. At √s̅ = 8 TeV, the total production cross sections are measured to be σ(gg → H → WW*) = 4.6 ± 0.9(stat){-0.7}^{+0.8}(syst) pb and σ(VBF H → WW*) = 0.51{-0.15}^{+0.17}(stat){-0.08}^{+0.13}(syst) pb. The fiducial cross section is determined for the gluon-fusion process in exclusive final states with zero or one associated jet.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2015. "Observation and measurement of Higgs boson decays to WW* with the ATLAS detector." Physical Review D 92(1), doi: 10.1103/PhysRevD.92.012006en_US
dc.identifier.issn1550-7998en_US
dc.identifier.issue1en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5167
dc.identifier.volume92en_US
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.92.012006
dc.rightsCC BY 3.0 (Attribution)en_US
dc.rights©2015 CERN, for the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourcePhysical Review D
dc.subjectHadron collidersen_US
dc.subjectStandard Modelen_US
dc.subjectPartonsen_US
dc.subjectMass (Physics)en_US
dc.subjectParticles (Nuclear physics)en_US
dc.subjectBroken symmetry (Physics)en_US
dc.subjectQuantum chromodynamicsen_US
dc.subjectLarge Hadron Collider (France and Switzerland)en_US
dc.subjectProton-proton interactionsen_US
dc.titleObservation and Measurement of Higgs Boson Decays to WW* with the ATLAS Detectoren_US
dc.type.genreArticleen_US

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Izen, Joseph M.