Measurements of multi-boson production including vector-boson scattering at ATLAS

Abstract

Measurements of multi-boson production at the LHC provide a precision test of the electroweak gauge structure predicted by the Standard Model, and they also offer a unique window to new physics beyond the SM. In this proceeding, we present recent ATLAS measurements on multiboson productions, including the electroweak production of a 𝑍𝛾 pair in association with two jets, the first observation of three 𝑊 bosons production, the observation of the 𝑊 pair production in photon-induced collisions, and also differential measurements of the inclusive four-lepton production. Interpretations on BSM using those precision measurements are also discussed. Moreover, constraints on Wilson coefficients of the SM Effective Field Theory are obtained by a combined fit to several multi-boson cross-section measurements.