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Measurement of the inclusive W and Z production cross sections in pp collisions at vs = 7 TeV with the CMS experiment

Abstract: A measurement of inclusive W and Z production cross sections in pp collisions at ?s = 7 TeV is presented. The electron and muon decay channels are analyzed in a data sample collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 pb?1. The measured inclusive cross sections are ?(pp ? WX) × B(W ?`?) = 10.31 ± 0.02 (stat.) ± 0.09 (syst.) ± 0.10 (th.) ± 0.41 (lumi.) nb and ?(pp ? ZX) × B(Z ? `+`?) = 0.974 ± 0.007 (stat.) ± 0.007 (syst.) ± 0.018 (th.) ± 0.039 (lumi.) nb, limited to the dilepton invariant mass range 60 to 120 GeV. The luminosity-independent cross section ratios are (?(pp ? WX) × B(W ? `?)) / (?(pp ? ZX) × B(Z ? `+`?)) =10.54 ± 0.07 (stat.) ± 0.08 (syst.) ± 0.16 (th.) and (?(pp ? W+X) × B(W+ ? `+?)) /(?(pp ? W?X) × B(W? ? ??¯)) = 1.421±0.006 (stat.)±0.014 (syst.)±0.029 (th.). The measured values agree with next-to-next-to-leading order QCD cross section calculations based on recent parton distribution functions.

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hänsel S., Hoch M., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V.,

Fuente: Journal of High Energy Physics, 2011, 2011(10), 132

Publisher: Springer Verlag

Publication date: 01/10/2011

No. of pages: 76

Publication type: Article

DOI: 10.1007/JHEP10(2011)132

ISSN: 1126-6708,1029-8479

Publication Url: https://doi.org/10.1007/JHEP10(2011)132

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