Measurement of Wγ and Zγ production in pp collisions at s=7 TeV

S Chatrchyan; V Khachatryan; AM Sirunyan; A Tumasyan; W Adam; T Bergauer; M Dragicevic; J Erö; C Fabjan; M Friedl; R Frühwirth; VM Ghete; J Hammer; S Hänsel; M Hoch; N Hörmann; J Hrubec; M Jeitler; G Kasieczka; W Kiesenhofer; M Krammer; D Liko; I Mikulec; M Pernicka; H Rohringer; R Schöfbeck; J Strauss; F Teischinger; P Wagner; W Waltenberger; G Walzel; E Widl; CE Wulz; V Mossolov; N Shumeiko; J Suarez Gonzalez; L Benucci; EA De Wolf; X Janssen; J Maes; T Maes; L Mucibello; S Ochesanu; B Roland; R Rougny; M Selvaggi; H Van Haevermaet; P Van Mechelen; N Van Remortel; F Blekman; S Blyweert; J D'Hondt; O Devroede; R Gonzalez Suarez; A Kalogeropoulos; M Maes; W Van Doninck; P Van Mulders; GP Van Onsem; I Villella; O Charaf; B Clerbaux; G De Lentdecker; V Dero; APR Gay; GH Hammad; T Hreus; PE Marage; L Thomas; C Vander Velde; P Vanlaer; V Adler; A Cimmino; S Costantini; M Grunewald; B Klein; J Lellouch; A Marinov; J Mccartin; D Ryckbosch; F Thyssen; M Tytgat; L Vanelderen; P Verwilligen; S Walsh; N Zaganidis; S Basegmez; G Bruno; J Caudron; L Ceard; E Cortina Gil; J De Favereau De Jeneret; C Delaere; D Favart; A Giammanco; G Grégoire; J Hollar; V Lemaitre; J Liao; O Militaru

Journal article

Measurement of Wγ and Zγ production in pp collisions at s=7 TeV

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, S Hänsel, M Hoch, N Hörmann, J Hrubec, M Jeitler, G Kasieczka, W Kiesenhofer Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | Published : 2011

DOI: 10.1016/j.physletb.2011.06.034

Abstract

A measurement of W γ and Z γ production in proton-proton collisions at s=7 TeV is presented. Results are based on a data sample recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36 pb-1. The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy ETγ>10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle ΔR(ℓ,γ)>0.7, and with an additional dilepton invariant mass requirement of Mℓℓ>50 GeV for the Z γ process. The following cross section times branching fraction values are found: σ(pp→Wγ+X)×B(W→ℓν)=56.3±5.0(stat.)±5.0(syst.)±2.3(lumi.) pb an..

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University of Melbourne Researchers

Phillip Urquijo Author

Grants

Awarded by National Science Foundation

Funding Acknowledgements

We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of Sciences and NICPB (Estonia); Academy of Finland, ME, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF. DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLPFAI (Mexico); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA).