Next-to-next-to-leading order event generation for $Z$ boson pair production matched to parton shower

Simone Alioli, Alessandro Broggio, Alessandro Gavardi +4

We present a novel next-to-next-to-leading order (NNLO) QCD calculation matched to parton shower for the production of a pair of $Z$ bosons decaying to four massless leptons, $p p…