/ hep-ex CMS-SMP-14-014

Measurement of the WZ production cross section in pp collisions at $\sqrt{s}$ = 7 and 8 TeV and search for anomalous triple gauge couplings at $\sqrt{s}$ = 8 TeV

Pages: 44

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 fb$^{-1}$ collected at $\sqrt{s} =$ 7 TeV, and 19.6 fb$^{-1}$ at $\sqrt{s} =$ 8 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 GeV are $\sigma(\mathrm{ p }\mathrm{ p }\to\mathrm{ W }\mathrm{ Z };\ \sqrt{s} = 7\, \mathrm{TeV}) =$ 20.14 $\pm$ 1.32 (stat) $\pm$ 1.13 (syst) $\pm$ 0.44 (lumi) pb and $\sigma(\mathrm{ p }\mathrm{ p }\to\mathrm{ W }\mathrm{ Z };\ \sqrt{s} = 8\, \mathrm{TeV}) =$ 24.09 $\pm$ 0.87 (stat) $\pm$ 1.62 (syst) $\pm$ 0.63 (lumi) pb. Differential cross sections with respect to the Z boson p$_{\mathrm{T}}$, the leading jet $p_{\mathrm{T}}$, and the number of jets are obtained using the $\sqrt{s} =$ 8 TeV data. The results are consistent with standard model predictions and constraints on anomalous triple gauge couplings are obtained.

Note: Submitted to EPJC

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Запись создана 2016-10-04, последняя модификация 2016-10-04

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