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

Chatrchyan, S. and Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Aguilo, E. and Bergauer, T. and Dragicevic, M. and Ero, J. and Fabjan, C. and Friedl, M. and Fruhwirth, R. and Ghete, V. M. and Hormann, N. and Hrubec, J. and Jeitler, M. and Kiesenhofer, W. and Knunz, V. and Krammer, M. and Kratschmer, I. and Liko, D. and Mikulec, I. and Pernicka, M. and Rabady, D. and Rahbaran, B. and Rohringer, C. and Rohringer, H. and Schofbeck, R. and Strauss, J. and Taurok, A. and Bencze, György and Hajdu, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Molnár, József and Pálinkás, József and Karancsi, János and Raics, Péter and Trócsányi, Zoltán and Ujvári, Balázs and Krajczár, Krisztián and Veres, Gábor (2013) Measurement of the W+W− and ZZ production cross sections in pp collisions at √s = 8 TeV. PHYSICS LETTERS B, 721 (4-5). pp. 190-211. ISSN 0370-2693

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Abstract

The W+W− and ZZ production cross sections are measured in proton-proton col- lisions at √s = 8 TeV with the CMS experiment at the LHC in data samples cor- responding 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 = 8 TeV.

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