Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/69321
Título: | Evidence for tt¯tt¯ production in the multilepton final state in proton–proton collisions at s√=13 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
Data: | 2020 |
Editora: | Springer |
Revista: | European Physical Journal C: Particles and Fields |
Citação: | Aad, G., Abbott, B., Abbott, D. C., Abud, A. A., Abeling, K., Abhayasinghe, D. K., . . . Zwalinski, L. (2020). Evidence for tt¯ tt¯ production in the multilepton final state in proton–proton collisions at √s=13 TeV with the ATLAS detector. [Article]. European Physical Journal C, 80(11). doi: 10.1140/epjc/s10052-020-08509-3 |
Resumo(s): | A search is presented for four-top-quark production using an integrated luminosity of 139 fb−1 of proton–proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be 24+7−6 fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 4.3 (2.4) standard deviations and provides evidence for this process. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/69321 |
DOI: | 10.1140/epjc/s10052-020-08509-3 |
ISSN: | 1434-6044 |
e-ISSN: | 1434-6052 |
Versão da editora: | https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-020-08509-3 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Aad2020_Article_EvidenceForTBarTTBarTTtTtProdu.pdf | 2,72 MB | Adobe PDF | Ver/Abrir |