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Measurement of the $W$\gamma${}$ and $Z$\gamma${}$ inclusive cross sections in $pp$ collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ and limits on anomalous triple gauge boson couplings


CMS Collaboration; Chatrchyan, S; Khachatryan, V; Sirunyan, A M; et al; Chiochia, V; Kilminster, B; Robmann, P (2014). Measurement of the $W$\gamma${}$ and $Z$\gamma${}$ inclusive cross sections in $pp$ collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ and limits on anomalous triple gauge boson couplings. Physical Review D (Particles, Fields, Gravitation and Cosmology), 89(092005):online.

Abstract

Measurements of W gamma and Z gamma production in proton-proton collisions at sqrt(s) = 7 TeV are used to extract limits on anomalous triple gauge couplings. The results are based on data recorded by the CMS experiment at the LHC that correspond to an integrated luminosity of 5.0 inverse femtobarns. The cross sections are measured for photon transverse momenta pt[gamma] > 15 GeV, and for separations between photons and final-state charged leptons in the pseudorapidity-azimuthal plane of Delta R[l, gamma] > 0.7 in l nu gamma and ll gamma final states, where l refers either to an electron or a muon. A dilepton invariant mass requirement of m[ll] > 50 GeV is imposed for the Z gamma process. No deviations are observed relative to predictions from the standard model, and limits are set on anomalous WW gamma, ZZ gamma, and Z gamma gamma triple gauge couplings.

Abstract

Measurements of W gamma and Z gamma production in proton-proton collisions at sqrt(s) = 7 TeV are used to extract limits on anomalous triple gauge couplings. The results are based on data recorded by the CMS experiment at the LHC that correspond to an integrated luminosity of 5.0 inverse femtobarns. The cross sections are measured for photon transverse momenta pt[gamma] > 15 GeV, and for separations between photons and final-state charged leptons in the pseudorapidity-azimuthal plane of Delta R[l, gamma] > 0.7 in l nu gamma and ll gamma final states, where l refers either to an electron or a muon. A dilepton invariant mass requirement of m[ll] > 50 GeV is imposed for the Z gamma process. No deviations are observed relative to predictions from the standard model, and limits are set on anomalous WW gamma, ZZ gamma, and Z gamma gamma triple gauge couplings.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:18 Feb 2014 13:50
Last Modified:14 Feb 2018 21:04
Publisher:American Physical Society
ISSN:1550-2368
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1103/PhysRevD.89.092005

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