First measurements of the W &#8594; &#8467;&#957; and Z/&#947; * &#8594; &#8467;&#8467; (&#8467; = e, &#956;) production cross sections in proton-proton collisions at are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W &#8594; &#8467;&#957; and 179 Z/&#947; * &#8594; &#8467;&#8467; candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb. The measured total W and Z/&#947; &#8727;-boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are . BR(W &#8594; &#8467;&#957;) = 9.96 ± 0.23(stat) ± 0.50(syst) ± 1.10(lumi) nb and BR(Z/&#947; &#8727; &#8594; &#8467;&#8467;) = 0.82 ± 0.06 (stat) ± 0.05 (syst) ± 0.09(lumi) nb (within the invariant mass window 66 < m &#8467;&#8467; &lt; 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 &#8722; 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.

G. AAD, E. ABAT, B. ABBOTT, J. ABDALLAH, A.A. ABDELALIM, A. ABDESSELAM, et al. (2010). Measurement of the W -> lnu and Z/gamma* -> ll production cross sections in proton-proton collisions at &#8730;s = 7 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 12, 1-65 [10.1007/JHEP12(2010)060].

Measurement of the W -> lnu and Z/gamma* -> ll production cross sections in proton-proton collisions at √s = 7 TeV with the ATLAS detector

BERTIN, ANTONIO;BINDI, MARCELLO;CAFORIO, DAVIDE;DE CASTRO, STEFANO;DI SIPIO, RICCARDO;FABBRI, LAURA;MASSA, IGNAZIO GIACOMO;PICCININI, MAURIZIO;RINALDI, LORENZO;SBARRA, CARLA;SBRIZZI, ANTONIO;SEMPRINI CESARI, NICOLA;VALENTINETTI, SARA;VILLA, MAURO;VITALE, ANTONIO;I. VIVARELLI;ZOCCOLI, ANTONIO;
2010

Abstract

First measurements of the W → ℓν and Z/γ * → ℓℓ (ℓ = e, μ) production cross sections in proton-proton collisions at are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W → ℓν 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 . BR(W → ℓν) = 9.96 ± 0.23(stat) ± 0.50(syst) ± 1.10(lumi) nb and 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.
2010
G. AAD, E. ABAT, B. ABBOTT, J. ABDALLAH, A.A. ABDELALIM, A. ABDESSELAM, et al. (2010). Measurement of the W -> lnu and Z/gamma* -> ll production cross sections in proton-proton collisions at &#8730;s = 7 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 12, 1-65 [10.1007/JHEP12(2010)060].
G. AAD; E. ABAT; B. ABBOTT; J. ABDALLAH; A.A. ABDELALIM; A. ABDESSELAM; O. ABDINOV; B. ABI; M. ABOLINS; H. ABRAMOWICZ; H. ABREU; E. ACERBI; B.S. ACHAR...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/98433
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