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− → l'νl''ν and ZZ → 2l2l', where l = e,μ and l'(l'') = 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 =8 TeV.
- W and Z pair production