Direct and indirect searches of new physics in multi-bosons final states at ATLAS

by Camilla Maiani

Thursday 13 Feb 2014, 11:00 → 11:30 Europe/Paris

Direct and indirect searches of new physics at high energy, performed at ATLAS in 2011 and 2012 by using W(lnu)gamma final states, are shown. Indirect searches aim to set limits on the Triple Gauge Couplings (TGC) related to the process production vertex: deviations from the Standard Model expectations might indicate the presence of new physics at very high energy. With similar techniques, but using the smaller statistical sample, the measurement of Quartic Gauge Couplings (QGC) in W(lnu)gammagamma final states can also be performed. In parallel, direct, model-independent searches for exotic resonances decaying to W(lnu)gamma final states are also performed up to 2 TeV of the Wgamma system transverse mass. Finally, the measurement of the spin-parity parameters of the Higgs boson candidate, performed a few months after its discovery, in the cleanest of its decay channels - H->ZZ->4l - also contributes to set limits on exotic models.

Transparents Maiani_seminaireGrenoble_13_02_2014.pdf