ZZ production at the LHC: fiducial cross sections and distributions in NNLO QCD

الأصل · EN

We consider QCD radiative corrections to the production of four charged leptons in the ZZ signal region at the LHC. We report on the complete calculation of the next-to-next-to-leading order (NNLO) corrections to this process in QCD perturbation theory. Numerical results are presented for √s=8 TeV, using typical selection cuts applied by the ATLAS and CMS collaborations. The NNLO corrections increase the NLO fiducial cross section by about 15%, and they have a relatively small impact on the shape of the considered kinematical distributions. In the case of the ΔΦ distribution of the two Z candidates, the NNLO corrections improve the agreement of the theoretical prediction with the CMS data.