The W+Wâ and ZZ production cross sections are measured in proton-proton collisions at âs = 8 TeV with the CMS experiment at the LHC in data samples corresponding to an integrated luminosity of up to 5.3 fbâ1. The measurements are performed in the leptonic decay modes W+Wâ â ââ²Î½ââ³Î½ and ZZ â 2â2ââ², where â = e, μ and ââ²(ââ³) = e, μ, Ï. The measured cross sections Ï (pp â W+Wâ) = 69.9 ± 2.8 (stat.) ± 5.6 (syst.) ± 3.1 (lum.) pb and Ï (pp â 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 âs=8 TeV.
Measurement of the W+W- and ZZ production cross sections in pp collisions at root s=8 TeV
ALBERGO, Sebastiano Francesco;CAPPELLO, GIGI;CHIORBOLI, MASSIMILIANO;COSTA, Salvatore;POTENZA, Renato Carlo;TRICOMI, Alessia Rita;TUVE', Cristina Natalina;
2013-01-01
Abstract
The W+Wâ and ZZ production cross sections are measured in proton-proton collisions at âs = 8 TeV with the CMS experiment at the LHC in data samples corresponding to an integrated luminosity of up to 5.3 fbâ1. The measurements are performed in the leptonic decay modes W+Wâ â ââ²Î½ââ³Î½ and ZZ â 2â2ââ², where â = e, μ and ââ²(ââ³) = e, μ, Ï. The measured cross sections Ï (pp â W+Wâ) = 69.9 ± 2.8 (stat.) ± 5.6 (syst.) ± 3.1 (lum.) pb and Ï (pp â 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 âs=8 TeV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.