Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/109209
Título: | Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector | Autor: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Palavras-chave: | Electroweak interaction; Hadron-Hadron scattering; Top physics | Data: | 2015 | Editora: | Springer Nature | Título da revista, periódico, livro ou evento: | Journal of High Energy Physics | Volume: | 2015 | Número: | 11 | Resumo: | 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 (Formula presented.) fb and (Formula presented.) 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. | URI: | https://hdl.handle.net/10316/109209 | DOI: | 10.1007/JHEP11(2015)172 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Measurement-of-the-ttW-and-ttZ-production-cross-sections-in-pp-collisions-at-s--8-TeV-with-the-ATLAS-detectorJournal-of-High-Energy-Physics.pdf | 2.01 MB | Adobe PDF | Ver/Abrir |
Este registo está protegido por Licença Creative Commons