Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/46044
Título: | Measurement of the W → ℓν and Z/γ* → ℓℓ production cross sections in proton-proton collisions at √ s = 7 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Hadron-Hadron Scattering |
Data: | Dez-2010 |
Editora: | Springer Verlag |
Revista: | Journal of High Energy Physics |
Citação: | Aad, G., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., Abdinov, O., . . . Collaboration, A. (2010). Measurement of the W -> lv and Z/gamma* -> ll production cross sections in proton-proton collisions at root s=7 TeV with the ATLAS detector. Journal of High Energy Physics(12). doi: 10.1007/jhep12(2010)060 |
Resumo(s): | First measurements of the W → ℓν and Z/γ * → ℓℓ (ℓ = e, μ) production cross sections in proton-proton collisions at √ s = 7TeV 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-1. 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 σtot W · BR(W → ℓν) = 9.96 ± 0.23(stat) ± 0.50(syst) ± 1.10(lumi) nb and σtot Z/γ* · BR(Z/ γ* → ℓℓ) = 0.82 ± 0.06 (stat) ± 0.05 (syst) ± 0.09 (lumi) nb (within the invariant mass window 66 < mℓℓ < 116 GeV). 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/46044 |
DOI: | 10.1007/jhep12(2010)060 |
ISSN: | 1029-8479 |
e-ISSN: | 1029-8479 |
Versão da editora: | https://link.springer.com/article/10.1007%2FJHEP12%282010%29060 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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art_3A10.1007_2FJHEP12_282010_29060.pdf | 2,48 MB | Adobe PDF | Ver/Abrir |