Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/69337
Título: | Observation of the associated production of a top quark and a Z boson in pp collisions at s√ = 13 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
Palavras-chave: | Hadron-Hadron scattering (experiments) |
Data: | 2020 |
Editora: | Springer |
Revista: | Journal of High Energy Physics |
Citação: | Aad, G., Abbott, B., Abbott, D. C., Abud, A. A., Abeling, K., Abhayasinghe, D. K., . . . Collaboration, A. (2020). Observation of the associated production of a top quark and a Z boson in pp collisions at root s=13 TeV with the ATLAS detector. Journal of High Energy Physics(7). doi: 10.1007/jhep07(2020)124 |
Resumo(s): | Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from tt¯Z and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tℓ+ℓ−q production, including non-resonant dilepton pairs with mℓ+ℓ− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/69337 |
DOI: | 10.1007/jhep07(2020)124 |
ISSN: | 1126-6708 |
e-ISSN: | 1029-8479 |
Versão da editora: | https://link.springer.com/article/10.1007%2FJHEP07%282020%29124 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Aad2020_Article_ObservationOfTheAssociatedProd.pdf | 834,29 kB | Adobe PDF | Ver/Abrir |