Multiboson Production at ATLAS

Measurements of multiboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions from anomalous couplings. In this talk we present recent ATLAS results on the first observation of three W boson production at the LHC (WWW). If available, we also present the differential cross-section measurement of the Z boson produced in association with two photons (Zyy). The studied processes are sensitive to quartic gauge couplings. Moreover, precise boson and diboson differential cross-section measurements are interpreted in a combined Effective Field Theory analysis, allowing to systematically probe gauge boson self-interactions.