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Inclusive W and Z production in the forward region at √s=7 TeV

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Measurements of inclusive W and Z boson production cross-sections in pp collisions at s√=7TeVs=7TeV \sqrt {s} = 7\,{\text{TeV}} using final states containing muons are presented. The data sample corresponds to an integrated luminosity of 37 pb−1 collected with the LHCb detector. The W and Z bosons a...

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Hauptverfasser: Aaij, Roel (VerfasserIn) , Adametz, Aleksandra (VerfasserIn) , Bachmann, Sebastian (VerfasserIn) , Bien, Alexander (VerfasserIn) , Britsch, Markward (VerfasserIn) , Blouw, Johan (VerfasserIn) , Comerma-Montells, Albert (VerfasserIn) , Dordei, Francesca (VerfasserIn) , Eisele, Franz (VerfasserIn) , Färber, Christian (VerfasserIn) , Hansmann-Menzemer, Stephanie (VerfasserIn) , Hartmann, Tobias (VerfasserIn) , Jäger, Andreas (VerfasserIn) , Kreplin, Katharina (VerfasserIn) , Krocker, Georg Alexander (VerfasserIn) , Krokovny, Pavel (VerfasserIn) , Langenbruch, Christoph (VerfasserIn) , Linn, Christian (VerfasserIn) , Marks, Jörg (VerfasserIn) , Meißner, Marco (VerfasserIn) , Nikodem, Thomas (VerfasserIn) , Seyfert, Paul (VerfasserIn) , Stahl, Sascha (VerfasserIn) , Tilburg, Jeroen van (VerfasserIn) , Uwer, Ulrich (VerfasserIn) , Wandernoth, Sebastian (VerfasserIn) , Wiedner, Dirk (VerfasserIn) , Zhelezov, Alexey (VerfasserIn)
Körperschaft: LHCb Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: June 11, 2012
In: Journal of high energy physics
Year: 2012, Heft: 6
ISSN:1029-8479
DOI:10.1007/JHEP06(2012)058
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1007/JHEP06(2012)058
Verlag, Volltext: https://doi.org/10.1007/JHEP06(2012)058
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Verfasserangaben:the LHCb Collaboration
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Zusammenfassung:Measurements of inclusive W and Z boson production cross-sections in pp collisions at s√=7TeVs=7TeV \sqrt {s} = 7\,{\text{TeV}} using final states containing muons are presented. The data sample corresponds to an integrated luminosity of 37 pb−1 collected with the LHCb detector. The W and Z bosons are reconstructed from muons with a transverse momentum above 20 GeV/c and pseudorapidity between 2.0 and 4.5, and, in the case of the Z cross-section, a dimuon invariant mass between 60 and 120 GeV/c2. The cross-sections are measured to be 831 ± 9 ± 27 ± 29pb for W +, 656 ± 8 ± 19 ± 23 for W − and 76.7 ± 1.7 ± 3.3 ± 2.7pb for Z, where the first uncertainty is statistical, the second is systematic and the third is due to the luminosity. Differential cross-sections, W and Z cross-section ratios and the lepton charge asymmetry are also measured in the same kinematic region. The ratios are determined to be σW+→μ+ν/σW−→μ−ν¯¯¯=1.27±0.02±0.01σW+→μ+ν/σW−→μ−ν¯=1.27±0.02±0.01 {\sigma_{{{W^{ + }} \to {\mu^{ + }}\nu }}}/{\sigma_{{{W^{ - }} \to {\mu^{ - }}\overline \nu }}} = 1.27\pm 0.02\pm 0.01 and (σW+→μ+ν+σW−→μ−ν¯¯¯)/σZ→μμ=19.4±0.5±0.9(σW+→μ+ν+σW−→μ−ν¯)/σZ→μμ=19.4±0.5±0.9 \left( {{\sigma_{{{W^{ + }} \to {\mu^{ + }}\nu }}} + {\sigma_{{{W^{ - }} \to {\mu^{ - }}\overline \nu }}}} \right)/{\sigma_{{Z \to \mu \mu }}} = 19.4\pm 0.5\pm 0.9 . The results are in general agreement with theoretical predictions, performed at next-to-next-to-leading order in QCD using recently calculated parton distribution functions. Open image in new window
Beschreibung:The LHCb Collaboration: R. Aaij, A. Adametz, S. Bachmann, A. Bien, J. Blouw, M. Britsch, A. Comerma-Montells, F. Dordei, F. Eisele, C. Fäber, S. Hansmann-Menzemer, T. Hartmann, A. Jaeger, K. Kreplin, G. Krocker, P. Krokovny, C. Langenbruch, C. Linn, J. Marks, M. Meissner, T. Nikodem, P. Seyfert, S. Stahl, J. v. Tilburg, U. Uwer, S. Wandernoth, D. Wiedner, A. Zhelezov [und weitere]
Gesehen am 30.10.2018
Beschreibung:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP06(2012)058

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