A measurement of the W boson pair production cross section in proton-proton collisions at âs = 8 TeV is presented. The data collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4fb-1. The W+W-candidates are selected from events with two charged leptons, electrons or muons, and large missing transverse energy. The measured W+W-cross section is 60.1 ± 0.9 (stat) ± 3.2 (exp) ± 3.1 (theo) ± 1.6 (lumi) pb = 60.1±4.8 pb, consistent with the standard model prediction. The W+W-cross sections are also measured in two different fiducial phase space regions. The normalized differential cross section is measured as a function of kinematic variables of the final-state charged leptons and compared with several perturbative QCD predictions. Limits on anomalous gauge couplings associated with dimension-six operators are also given in the framework of an effective field theory. The corresponding 95 % confidence level intervals are -5.7
Measurement of the W+W-cross section in pp collisions at âs= 8 TeVand limits on anomalous gauge couplings
Costa, S.Membro del Collaboration Group
;Potenza, R.Membro del Collaboration Group
;Tricomi, A.Membro del Collaboration Group
;Tuve, C.Membro del Collaboration Group
;
2016-01-01
Abstract
A measurement of the W boson pair production cross section in proton-proton collisions at âs = 8 TeV is presented. The data collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4fb-1. The W+W-candidates are selected from events with two charged leptons, electrons or muons, and large missing transverse energy. The measured W+W-cross section is 60.1 ± 0.9 (stat) ± 3.2 (exp) ± 3.1 (theo) ± 1.6 (lumi) pb = 60.1±4.8 pb, consistent with the standard model prediction. The W+W-cross sections are also measured in two different fiducial phase space regions. The normalized differential cross section is measured as a function of kinematic variables of the final-state charged leptons and compared with several perturbative QCD predictions. Limits on anomalous gauge couplings associated with dimension-six operators are also given in the framework of an effective field theory. The corresponding 95 % confidence level intervals are -5.7File | Dimensione | Formato | |
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