Measurement of the WW+ WZ cross section and limits on anomalous triple gauge couplings using final states with one lepton, missing transverse momentum, and two jets with the …

A bstract The production of a W boson decaying to eν or μν in association with a W or Z boson decaying to two jets is studied using 4. 6 fb− 1 of proton-proton collision data at s= 7 s= 7 TeV recorded with the ATLAS detector at the LHC. The combined WW+ WZ cross section is measured with a significance of 3.4 σ and is found to be 68±7 (stat.)±19 (syst.) pb, in agreement with the Standard Model expectation of 61. 1±2. 2 pb. The distribution of the transverse momentum of the dijet system is used to set limits on anomalous contributions to the triple gauge coupling vertices and on parameters of an effective-field-theory model.