Measurement of the W+W− cross section in pp collisions at $\sqrt{s} = 7\mbox{ TeV}$ and limits on anomalous WWγ and WWZ couplings

Abstract

A measurement of W + W -production in pp collisions at s = 7 TeV is presented. The data were collected with the CMS detector at the LHC, and correspond to an integrated luminosity of 4.92 0.11 fb -1 . The W + W -candidates consist of two oppositely charged leptons, electrons or muons, accompanied by large missing transverse energy. The W + W -production cross section is measured to be 52.4 2.0 (stat.) 4.5 (syst.) 1.2 (lum.) pb. This measurement is consistent with the standard model prediction of 47.02.0 pb at next-to-leading order. Stringent limits on the WW and WWZ anomalous triple gauge-boson couplings are set.