Abstract

The WZ production cross section is measured by the CMS experiment at the CERN LHC in proton–proton collision data samples corresponding to integrated luminosities of 4.9,text{fb}^{-1} collected at sqrt{s} = 7,text{TeV} , and 19.6,text{fb}^{-1} at sqrt{s} = 8,text{TeV} . The measurements are performed using the fully-leptonic WZ decay modes with electrons and muons in the final state. The measured cross sections for 71< m_{mathrm{Z}} < 111,text{GeV} are sigma ({mathrm{p}mathrm{p}}rightarrow {mathrm{W}mathrm{Z}};~sqrt{s} = 7,text{TeV}) = 20.14 pm 1.32,text{(stat)} pm 0.38,text{(theo)} pm 1.06,text{(exp)} pm 0.44,text{(lumi)} ,text{pb} and sigma ({mathrm{p}mathrm{p}}rightarrow {mathrm{W}mathrm{Z}};~sqrt{s} = 8,text{TeV}) = 24.09 pm 0.87,text{(stat)} pm 0.80,text{(theo)} pm 1.40,text{(exp)} pm 0.63,text{(lumi)} ,text{pb}. Differential cross sections with respect to the mathrm{Z} boson p_{mathrm{T}}, the leading jet p_{mathrm{T}}, and the number of jets are obtained using the sqrt{s} = 8,text{TeV} data. The results are consistent with standard model predictions and constraints on anomalous triple gauge couplings are obtained.

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