Measurement of WW/WZ -> lvqq ' production with the hadronically decaying boson reconstructed as one or two jets in pp collisions at root s=8 TeV with ATLAS, and constraints on anomalous gauge couplings

This paper presents a study of the production of W W or W Z boson pairs, with one W boson decaying to eν or μν and one W or Z boson decaying hadronically. The analy- sis uses 20.2 fb−1 of √s = 8 TeV pp collision data, collected by the ATLAS detector at the Large Hadron Collider. Cross- sections for W W/W Z production are measured in high-pT fiducial regions defined close to the experimental event selec- tion. The cross-section is measured for the case where the hadronically decaying boson is reconstructed as two resolved jets, and the case where it is reconstructed as a single jet. The transverse momentum distribution of the hadronically decaying boson is used to search for new physics. Obser- vations are consistent with the Standard Model predictions, and 95% confidence intervals are calculated for parameters describing anomalous triple gauge-boson couplings.