Measurement of the w+w- and ZZ production cross sections in pp collisions at √s=8 TeV

Abstract

The W+W− and ZZ production cross sections are measured in proton–proton collisions at √s = 8 TeV with the CMS experiment at the LHC in data samples corresponding to an integrated luminosity of up to 5.3 fb−1. The measurements are performed in the leptonic decay modes W+W− → ν ν and ZZ → 2 2 , where = e,μ and ( ) = e,μ, τ . The measured cross sections σ(pp → W+W−) = 69.9±2.8(stat.)±5.6(syst.)±3.1(lum.) pb and σ pp→ZZ) = 8.4±1.0(stat.)±0.7(syst.)±0.4 lum.) pb, for both Z bosons produced in the mass region 60 < mZ < 120 GeV, are consistent with standard model predictions. These are the first measurements of the diboson production cross sections at √s =8TeV.