Measurements are presented of high energy photons produced in association with W and Z bosons in pp collisions at √s = 7 TeV using the ATLAS detector. The analysis uses W and Z bosons selected with leptonic (e/µ) decays. Subsets of these events are identiﬁed by demanding an electromagnetic object passing isolated photon selection criteria. We isolate signals of p + p → l + ν + γ + X and p + p → l + l + γ + X production with photon ET > 15 GeV and delatR(l -γ ) > 0.7. The production cross sections and the kinematic distributions of the leptons and photons are compared to Standard Model predictions. The measurements are sensitive to the electroweak triple gauge couplings of the Standard Model, and constraints are set on anomalous TGCs.
Dr Antonio Baroncelli (INFN / Roma TRE)