Speaker
Description
In this talk, we present a number of recent measurements of inclusive ZZ and Z𝛾 production in proton-proton collisions at √s=13 TeV at ATLAS. The unfolded differential cross section for ZZ->4l as a function of the four-lepton invariant mass is presented and compared to state-of-the-art Standard Model calculations. If available, an additional measurement of ZZ production will be presented for events in which the ZZ system decays to two charged leptons and two neutrinos. We also report measurements of Z-boson production in association with a high-energy photon, using the Z-boson decay to neutrinos and (if available) the Z boson decay to b-quarks and respectively to charged leptons. The data in all these measurements can be used to search for triple- and quartic- neutral gauge boson interactions, which are forbidden at tree-level in the Standard Model. No excess is observed relative to the Standard Model expectation, and upper limits are set on the strength of ZZγ and Zγγ couplings.
