Abstract
ATLAS measurements of diboson production processes involving combinations of W, Z and isolated photons are summarized. Measurements using data at 7 TeV as well as more recent results using data at 8 TeV are presented. The measurements are performed using leptonic decay modes, including the invisible decay Z → , as well as semileptonic channels. Differential and total cross sections are presented and are used to place constraints on anomalous triple-gauge boson couplings. An overview of these results is given.
Highlights
The large data statistics collected b√y ATLAS [1] in 2011 and 2012, in LHC pp collisions at s = 7 TeV and 8 TeV, respectively, provide precision measurements of the diboson production mechanism described by the Electroweak sector of the Standard Model (SM)
In the following we present measurements of diboson production cross sections and searches of anomalous contributions to SM predicted triple gauge couplings
Additional contributions come from final state radiation (FSR) with the photon irradiated from decay leptons in W and Z events
Summary
The cross-section measurements provide sensitive tests of the electroweak interaction at the TeV scale. Diboson channels are sensitive to new physics phenomena, either through resonant production of new particles or through anomalous contribution to Triple. Interactions between gauge boson are predicted by the SM. Any deviation of the triple gauge couplings from the SM prediction will enhance diboson production with higher invariant masses. Studies of diboson events are candles to improve understanding of background processes in searches of SM Higgs boson and new physics at the high energy frontier. In the following we present measurements of diboson production cross sections and searches of anomalous contributions to SM predicted triple gauge couplings
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