We report on the first computation of the next-to-next-to-leading order (NNLO) QCD corrections to W±Z production in proton collisions. We consider both the inclusive production of on-shell W±Z pairs at LHC energies and the total W±Z rates including off-shell effects of the W and Z bosons. In the off-shell computation, the invariant mass of the lepton pairs from the Z boson decay is required to be in a given mass window, and the results are compared with the corresponding measurements obtained by the ATLAS and CMS collaborations. The NNLO corrections range from 8% at s=7 TeV to 11% at s=14 TeV and significantly improve the agreement with the LHC data at s=7 and 8 TeV.
@article{arxiv.1604.08576,
title = {$W^{\pm}Z$ production at hadron colliders in NNLO QCD},
author = {Massimiliano Grazzini and Stefan Kallweit and Dirk Rathlev and Marius Wiesemann},
journal= {arXiv preprint arXiv:1604.08576},
year = {2016}
}