Measurements of inclusive W and Z cross sections in pp collisions at sqrt(s) = 7 TeV
(2011) Journal of High Energy Physics — Vol. 2011, n° 10, p. 132 (2011)
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- Abstract
- A measurement of inclusive W and Z production cross sections in pp collisions at Ös = 7s=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 σ(pp → WX) × B( \textW ® ln ) W = 10.31 ± 0.02 (stat.) ± 0.09 (syst.) ± 0.10 (th.) ± 0.41 (lumi.) nb and σ(pp → ZX) × B( \textZ ® l+ l- ) 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 (σ(pp → WX) × B( \textW ® ln ) W /(σ(pp → ZX) × B( \textZ ® l+ l- ) Z+− = 10.54 ± 0.07 (stat.) ± 0.08 (syst.) ± 0.16 (th.) and (σ(pp → W+ X) × B( \textW + ® l+ n ) W++ /(σ(pp → W− X) × B( \textW- ® l- [`(n)] ) 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.
- Affiliations
- Yerevan Phys. Inst.
Citations
Collaboration CMS, Chatrchyan, S., Basegmez, S., Bruno, G., Caudron, J., Ceard, L., Cortina Gil, E., de Favereau de Jeneret, J., Delaere, C., Favart, D., Forthomme, L., Giammanco, A., Grégoire, G., Hollar, J., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., Ovyn, S., et al. (2011). Measurements of inclusive W and Z cross sections in pp collisions at sqrt(s) = 7 TeV. Journal of High Energy Physics, 2011(10), 132. https://doi.org/10.1007/JHEP10(2011)132 (Original work published 2011)