Speaker
Description
Measurements of multiboson production at the LHC are important probes of the electroweak gauge structure of the Standard Model and can constrain anomalous gauge boson couplings. In this talk, recent measurements of diboson production by the ATLAS experiment are presented. Inclusive and differential measurements of WW, ZZ and Zy production are highlighted. The results are used to constrain anomalous trilinear charged and neutral gauge couplings in an effective field theory approach. Quartic electroweak gauge couplings can be probed in triboson production or the electroweak diboson production in association with two jets. The measurement of electroweak Wyjj and WZjj production will be discussed. In addition, a measurement VVjj production in the semi-leptonic final state as well as the production of three massive electroweak gauge bosons are discussed. These channels provide the most stringent constraints on anomalous quartic gauge couplings. The talk will close with ATLAS’ first study of polarised scattering of two W bosons with the same electric charge, a fundamental test of electroweak symmetry breaking with the Higgs mechanism.
