Observation and measurements of vector-boson scattering at the ATLAS detector

The scattering of electroweak bosons tests the gauge structure of the Standard Model and is sensitive to anomalous quartic gauge couplings. In this paper, we present recent results on vector-boson scattering from the ATLAS experiment using proton-proton collisions with center-of-mass energy at \SI{13}{\TeV} at LHC. This includes the observation of \ZZ, \WZ, and same-sign-\WW production via vector-boson scattering along with a measurement of \VV production~(\V denotes \PW or \PZ boson) in semi-leptonic final-states. The results can be used to constrain new physics that manifests as anomalous electroweak-boson self interactions. Finally, predicted cross sections for electroweak scattering of two same-sign \PW bosons in association with two jets are compared for a number of Monte Carlo models.