Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/39870
Título: | Measurement of the t(t)over-barW and t(t)over-barZ production cross sections in pp collisions at root s=8 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Electroweak interaction Hadron-Hadron scattering Top physics |
Data: | 2015 |
Editora: | Springer Verlag |
Revista: | Journal of High Energy Physics |
Citação: | Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., . . . Collaboration, A. (2015). Measurement of the t(t)over-barW and t(t)over-barZ production cross sections in pp collisions at root s=8 TeV with the ATLAS detector. Journal of High Energy Physics(11). doi: 10.1007/jhep11(2015)172 |
Resumo(s): | The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at s√=8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb−1 collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the tt¯W and tt¯Z processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for tt¯W (tt¯Z) production. The measured cross sections are σtt¯W=369+100−91 fb and σtt¯Z=176+58−52 fb. The background-only hypothesis with neither tt¯W nor tt¯Z production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the tt¯W and tt¯Z processes. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39870 |
DOI: | 10.1007/jhep11(2015)172 |
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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art-3A10.1007-2FJHEP11-282015-29172.pdf | 2,01 MB | Adobe PDF | Ver/Abrir |