Studies of quartic electroweak interactions in the ATLAS experiment

Processes involving quartic electroweak gauge couplings have become experimentally accessible for the first time in the run-2 dataset of the LHC. In this talk, recent measurements of triboson production and the electroweak diboson production in association with two jets by the ATLAS experiment are presented. Differential measurements of Zyy production, as well as the observation of Wyy, WZy and WWy production are highlighted. Moreover, measurements of vector-boson scattering to ZZ, Zy, WW and Wy are discussed. They include a large set of differential distributions in the ZZ, Zy and same-sign WW channels. The results are used to constrain dimension-eight operators affecting quartic electroweak couplings in an Effective Field Theory framework.