Measurement of the ZZ production cross section and search for anomalous couplings in 2l2l' final states in pp collisions at √s=7 TeV

Abstract

A measurement is presented of the ZZ production cross section in the ZZ → 2`2` 0 decay mode with ` = e, µ and ` 0 = e, µ, τ in proton-proton collisions at √ s = 7 TeV with the CMS experiment at the LHC. Results are based on data corresponding to an integrated luminosity of 5.0 fb−1 . The measured cross section σ(pp → ZZ) = 6.24 +0.86 −0.80 (stat.) +0.41 −0.32 (syst.) ± 0.14 (lumi.) pb is consistent with the standard model predictions. The following limits on ZZZ and ZZγ anomalous trilinear gauge couplings are set at 95% confidence level: −0.011 < fZ 4 < 0.012, −0.012 < fZ 5 < 0.012, −0.013 < f γ 4 < 0.015, and −0.014 < f γ 5 < 0.014.