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Measurement of the $W\to\ell\nu$ and $Z/gamma^\ast\to\ell\ell$ Production Cross Sections in Proton-Proton Collisions at $\sqrt{s}=7$ TeV with the ATLAS Detector
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
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2010 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 12, 060- p.Article in journal (Refereed) Published
Abstract [en]

First measurements of the W →ν and Z/γ * ℓℓ (ℓ = e, μ) production cross sections in proton-proton collisions at Ös = 7  \textTeV s=7TeV are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W →ν and 179 Z/γ * → ℓℓ candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb. The measured total W and Z/γ -boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are sW\texttot Wtot. BR(W → ℓν) = 9.96 ± 0.23(stat) ± 0.50(syst) ± 1.10(lumi) nb and sZ / g \texttot totZ BR(Z/γ → ℓℓ) = 0.82 ± 0.06 (stat) ± 0.05 (syst) ± 0.09(lumi) nb (within the invariant mass window 66 < m ℓℓ < 116GeV). The W/Z cross-section ratio is measured to be 11.7 ± 0.9(stat) ± 0.4(syst). In addition, measurements of the W + and W production cross sections and of the lepton charge asymmetry are reported. Theoretical predictions based on NNLO QCD calculations are found to agree with the measurements

Place, publisher, year, edition, pages
2010. no 12, 060- p.
Keyword [en]
Hadron-Hadron scattering
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-62022DOI: 10.1007/JHEP12(2010)060ISI: 000208219100001OAI: oai:DiVA.org:su-62022DiVA: diva2:439405
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Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

Publikationen har totalt 3172 författare, G. Aad et al.

Available from: 2011-09-07 Created: 2011-09-07 Last updated: 2017-12-08Bibliographically approved

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Åsman, BarbroBohm, ChristianEriksson, DanielGellerstedt, KarlHellman, StenHidvégi, AttilaHolmgren, Sven-OlofJohansen, MarianneJohansson, ErikJon-And, KerstinMilstead, DavidMoa, TorbjörnNordkvist, BjörnOhm, ChristianSelldén, BjörnSilverstein, SamuelSjölin, JörgenStrandberg, SaraTylmad, MajaYang, Zhaoyu
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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