Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/31768
Título: | Measurement of the production of a W boson in association with a charm quark in pp collisions at s√= 7 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Electroweak interaction Hadron-Hadron Scattering Charm physics |
Data: | 2014 |
Editora: | Springer |
Revista: | Journal of High Energy Physics |
Citação: | Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S. A., Abdinov, O., . . . Zwalinski, L. (2014). Measurement of the production of a W boson in association with a charm quark in pp collisions at root s=7 TeV with the ATLAS detector. Journal of High Energy Physics(5), 1-67. doi: 10.1007/jhep05(2014)068 |
Resumo(s): | The production of a W boson in association with a single charm quark is studied using 4.6 fb^-1 of pp collision data at sqrt(s)=7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96 +0.26 -0.30 at Q^2=1.9 GeV^2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio sigma(W^+ + bar{c})/sigma(W^- + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-bar{s} quark asymmetry. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/31768 |
DOI: | 10.1007/jhep05(2014)068 |
ISSN: | 1029-8479 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1402.6263.pdf | 2,5 MB | Adobe PDF | Ver/Abrir |