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Measurement of the WZ production cross section in pp collisions at √s 7 and 8 TeV and search for anomalous triple gauge couplings at √s 8TeV

par Khachatryan, Vardan;Brun, Hugues ;Clerbaux, Barbara ;De Lentdecker, Gilles ;Delannoy, Hugo ;Fasanella, Giuseppe ;Favart, Laurent ;Goldouzian, Reza ;Grebenyuk, Anastasia ;Karapostoli, Georgia ;Lenzi, Thomas ;Leonard, Alexandre ;Luetic, Jelena ;Maerschalk, Thierry ;Marinov, Audrey ;Randle-Conde, Aidan Sean ;Seva, Tomislav ;Vander Velde, Catherine ;Vanlaer, Pascal ;Yonamine, Ryo ;Zenoni, Florian ;Zhang, Fengwangdong ;Fang, Wenxing ;Dorney, Brian ;Wang, Qun
Référence European Physical Journal C. Particles and Fields, 77, 4
Publication Publié, 2017

Article révisé par les pairs

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Résumé :

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 4.9fb-1 collected at s 7TeV, and 19.6fb-1 at s 8TeV. 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<mZ<111GeV are σ(pp→WZ;s 7TeV) 20.14±1.32(stat)±0.38(theo)±1.06(exp)±0.44(lumi)pb and σ(pp→WZ;s 8TeV) 24.09±0.87(stat)±0.80(theo)±1.40(exp)±0.63(lumi)pb. Differential cross sections with respect to the Z boson pT, the leading jet pT, and the number of jets are obtained using the s 8TeV data. The results are consistent with standard model predictions and constraints on anomalous triple gauge couplings are obtained. © 2017, CERN for the benefit of the CMS collaboration.