Measurement of the Wγ and Zγ inclusive cross sections in pp collisions at √s = 7 TeV and limits on anomalous triple gauge boson couplings

Chatrchyan, S. and Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Erö, J. and Fabjan, C. and Friedl, M. and Frühwirth, R. and Ghete, V. M. and Hörmann, N. and Hrubec, J. and Jeitler, M. and Kiesenhofer, W. and Knünz, V. and Krammer, M. and Krätschmer, I. and Liko, D. and Mikulec, I. and Rabady, D. and Rahbaran, B. and Rohringer, C. and Rohringer, H. and Schöfbeck, R. and Strauss, J. and Taurok, A. and Treberer-Treberspurg, W. and Waltenberger, W. and Bencze, György and Hajdu, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Béni, Noémi Tekla and Molnár, József and Pálinkás, József and Szillási, Zoltán and Karancsi, János and Raics, Péter and Trócsányi, Zoltán and Ujvári, Balázs and Veres, Gábor (2014) Measurement of the Wγ and Zγ inclusive cross sections in pp collisions at √s = 7 TeV and limits on anomalous triple gauge boson couplings. PHYSICAL REVIEW D, 89 (9). ISSN 2470-0010

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Abstract

Measurements of Wγ and Zγ production in proton-proton collisions at √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 fb−1. The cross sections are measured for photon transverse mo- menta pγ T > 15 GeV, and for separations between photons and final-state charged leptons in the pseudorapidity-azimuthal plane of ∆R(`, γ) > 0.7 in `νγ and ``γ fi- nal states, where ` refers either to an electron or a muon. A dilepton invariant mass requirement of m`` > 50 GeV is imposed for the Zγ process. No deviations are ob- served relative to predictions from the standard model, and limits are set on anoma- lous WWγ, ZZγ, and Zγγ triple gauge couplings.

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