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Evidence for exclusive γγ → W + W − production and constraints on anomalous quartic gauge couplings in pp collisions at √s=7 and 8 TeV

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dc.contributor.author CMS Collaboration en_US
dc.contributor.author Khachatryan, V. en_US
dc.contributor.author CHAUHAN, S. en_US
dc.contributor.author DUBE, SOURABH en_US
dc.contributor.author KAPOOR, A. en_US
dc.contributor.author KOTHEKAR, K. en_US
dc.contributor.author RANE, A. en_US
dc.contributor.author SHARMA, SEEMA et al. en_US
dc.date.accessioned 2019-04-29T10:18:23Z
dc.date.available 2019-04-29T10:18:23Z
dc.date.issued 2016-08 en_US
dc.identifier.citation Journal of High Energy Physics, 2016(119). en_US
dc.identifier.issn 1126-6708 en_US
dc.identifier.issn 1029-8479 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/2790
dc.identifier.uri https://doi.org/10.1007/JHEP08(2016)119 en_US
dc.description.abstract A search for exclusive or quasi-exclusive γγ → W + W − production, via pp → p (*) W + W − p (*) → p (*) μ ±e∓ p (*) at s√=8 TeV, is reported using data corresponding to an integrated luminosity of 19.7 fb−1. Events are selected by requiring the presence of an electron-muon pair with large transverse momentum p T(μ ±e∓) > 30 GeV, and no associated charged particles detected from the same vertex. The 8 TeV results are combined with the previous 7 TeV results (obtained for 5.05 fb−1 of data). In the signal region, 13 (2) events are observed over an expected background of 3.9 ± 0.6 (0.84 ± 0.15) events for 8 (7) TeV, resulting in a combined excess of 3.4σ over the background-only hypothesis. The observed yields and kinematic distributions are compatible with the standard model prediction for exclusive and quasi-exclusive γγ → W + W − production. Upper limits on the anomalous quartic gauge coupling operators a W0,C (dimension-6) and f M0,1,2,3 (dimension-8), the most stringent to date, are derived from the measured dilepton transverse momentum spectrum. en_US
dc.language.iso en en_US
dc.publisher Springer Nature en_US
dc.subject Evidence for exclusive en_US
dc.subject Constraints on anomalous en_US
dc.subject Quartic gauge couplings en_US
dc.subject Forward physics en_US
dc.subject Hadron-Hadron scattering en_US
dc.subject Experiments en_US
dc.subject 2016 en_US
dc.title Evidence for exclusive γγ → W + W − production and constraints on anomalous quartic gauge couplings in pp collisions at √s=7 and 8 TeV en_US
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle Journal of High Energy Physics en_US
dc.publication.originofpublisher Foreign en_US


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