Vector boson scattering and measurement of electroweak production of two like-charge W bosons and two jets at ATLAS

The scattering of electroweak gauge bosons is closely connected to the electroweak gauge symmetry and its spontaneous breaking through the Higgs mechanism. It allows to probe the self-interaction of electroweak gauge bosons, in particular their quartic vertices. The contribution of the Higgs boson to the weak boson scattering amplitude ensures unitarity of the scattering matrix. Therefore, the scattering of massive electroweak gauge bosons is sensitive to deviations from the Standard Model prescription of the electroweak interaction and of the properties of the Higgs mechanism.
At the Large Hadron Collider, the scattering of massive electroweak gauge bosons is accessible
through the measurement of purely electroweak production of two jets and two gauge bosons. This talk presents the first measurement of electroweak production of two jets and two identically charged W bosons, which yields the first observation of a process with contributions from quartic gauge interactions of massive electroweak gauge bosons.
Limits on anomalous quartic gauge couplings as described within the framework of an effective field theory are derived based on this measurement.