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Paper   IPM / Particles / 11883
School of Particles and Accelerator
  Title:   Measurement of Wg and Zg production in pp collisions at sqrt(s) = 7 TeV
  Author(s): 
1.  Hessamadin Arfaei
2.  Hamed Bakhshiansohi
3.  Seyed Mohsen Etesami
4.  Ali Fahim
5.  Majid Hashemi
6.  Abideh Jafari
7.  Mohsen Khakzad
8.  A Mohammadi
9.  Mojtaba Mohammadi Najafabadi
10.  Saeid Paktinat Mehdiabadi
11.  Batool Safarzadeh
12.  Maryam Zeinali
  Status:   Published
  Journal: Phys. Lett. B
  Vol.:  701
  Year:  2011
  Pages:   535-555
  Supported by:  IPM
  Abstract:
A measurement of Wg and Zg 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 pb(-1), 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 E g T > 10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle DR(`, g) > 0.7, and with an additional dilepton invariant mass requirement of Mll > 50 GeV for the Zg process. The following cross section times branching fraction values are found: s(pp - Wg + X) * B(W - lv) = 56.3 5.0 (stat.) +- 5.0 (syst.)  2.3 (lumi.) pb and s(pp - Zg + 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 WWg, ZZg, and Zgg trilinear gauge couplings at sqrt(s)= 7 TeV are set

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