Journal article
Measurement of Wγ and Zγ production in pp collisions at √s = 7 TeV
Physics letters. B, Vol.701(5), pp.535-555
01/01/2011
DOI: 10.1016/j.physletb.2011.06.034
Abstract
A measurement of W-gamma and Z-gamma production in proton-proton collisions at sqrt(s) = 7 TeV, based on a data sample recorded by the CMS experiment at the LHC, and corresponding to an integrated luminosity of 36 inverse picobarns, is presented. The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy >10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle >0.7, and with an additional dilepton invariant mass requirement of > 50 GeV for the Z-gamma process. The following cross section times branching fraction values are found: sigma(pp to W-gamma+X) B(W \to lepton neutrino) = 56.3 +/- 5.0 (stat.) +/- 5.0 (syst.) +/- 2.3 (lumi.) pb and sigma(pp to Z-gamma+X) B}(Z to lepton lepton) = 9.4 +/- 1.0 (stat.) +/- 0.6 (syst.) +/- 0.4 (lumi.) pb. These measurements are in agreement with standard model predictions. The first limits on anomalous WW gamma, ZZ gamma, and Z gamma gamma trilinear gauge couplings at sqrt(s) = 7 TeV are set.
A measurement of W-gamma and Z-gamma production in proton-proton collisions at sqrt(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 inverse picobarns. The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy >10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle >0.7, and with an additional dilepton invariant mass requirement of > 50 GeV for the Z-gamma process. The following cross section times branching fraction values are found: sigma(pp to W-gamma+X) B(W to lepton neutrino) = 56.3 +/- 5.0 (stat.) +/- 5.0 (syst.) +/- 2.3 (lumi.) pb and sigma(pp to Z-gamma+X) B}(Z to lepton lepton) = 9.4 +/- 1.0 (stat.) +/- 0.6 (syst.) +/- 0.4 (lumi.) pb. These measurements are in agreement with standard model predictions. The first limits on anomalous WW gamma, ZZ gamma, and Z gamma gamma trilinear gauge couplings at sqrt(s) = 7 TeV are set.
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 and σ(pp→Zγ+X)×B(Z→ℓℓ)=9.4±1.0(stat.)±0.6(syst.)±0.4(lumi.) pb . These measurements are in agreement with standard model predictions. The first limits on anomalous WW γ , ZZ γ , and Z γγ trilinear gauge couplings at s=7 TeV are set.
Details
- Title: Subtitle
- Measurement of Wγ and Zγ production in pp collisions at √s = 7 TeV
- Creators
- Francisco Javier Cuevas MaestroJavier Fernández MenéndezSantiago Folgueras GómezIsidro González CaballeroLara Lloret IglesiasJesús Manuel Vizán GarcíaCMS Collaboration
- Contributors
- C. R Newsom (Contributor) - University of Iowa, Physics and AstronomyY Onel (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physics letters. B, Vol.701(5), pp.535-555
- DOI
- 10.1016/j.physletb.2011.06.034
- ISSN
- 0370-2693
- eISSN
- 1873-2445
- Publisher
- Elsevier B.V
- Grant note
- name: FMSR; DOI: 10.13039/501100002661, name: FNRS; name: FWO; DOI: 10.13039/501100003593, name: CNPq; DOI: 10.13039/501100002322, name: CAPES; DOI: 10.13039/501100004586, name: FAPERJ; DOI: 10.13039/501100001807, name: FAPESP; name: MES; DOI: 10.13039/100012470, name: CERN; name: CAS; name: MoST; DOI: 10.13039/501100001809, name: NSFC; DOI: 10.13039/100007637, name: COLCIENCIAS; name: MSES; name: RPF; name: Academy of Sciences; name: NICPB; DOI: 10.13039/501100002341, name: Academy of Finland; name: ME; name: HIP; name: CEA; name: CNRS/IN2P3; name: BMBF; name: DFG; name: HGF; DOI: 10.13039/501100003448, name: GSRT; DOI: 10.13039/501100003549, name: OTKA; DOI: 10.13039/501100003827, name: NKTH; name: DAE; name: DST; name: IPM; name: SFI; name: INFN; name: NRF; name: WCU; name: LAS; DOI: 10.13039/501100008688, name: CINVESTAV; name: CONACYT; name: SEP; name: UASLP-FAI; DOI: 10.13039/501100008689, name: PAEC; name: SCSR; name: FCT; DOI: 10.13039/501100003822, name: JINR; name: MST; name: MAE; name: MSTD; DOI: 10.13039/501100004837, name: MICINN; name: CPAN; name: Swiss Funding Agencies; name: NSC; name: TUBITAK; DOI: 10.13039/100010440, name: TAEK; DOI: 10.13039/501100000271, name: STFC; name: DOE; name: NSF
- Language
- English
- Date published
- 01/01/2011
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199745602771
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