Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/39902
Título: | Search for s-channel single top-quark production in proton-proton collisions at s√=8 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Electroweak interaction Top physics Heavy quark production Experimental results ATLAS Top quark Electroweak production s-Channel |
Data: | 2015 |
Editora: | Elsevier 1 |
Revista: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Citação: | Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., . . . Zwalinski, L. (2015). Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 740, 118-136. doi: 10.1016/j.physletb.2014.11.042 |
Resumo(s): | This Letter presents a search at the LHC for s-channel single top-quark production in proton-proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb−1. Selected events contain one charged lepton, large missing transverse momentum and exactly two b-tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s-channel single top-quark events from the main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s-channel single top-quark production cross-section of 14.6 pb at the 95% confidence level. The fit gives a cross-section of σs=5.0±4.3 pb, consistent with the Standard Model expectation. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39902 |
DOI: | 10.1016/j.physletb.2014.11.042 |
ISSN: | 0370-2693 1873-2445 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Physics-Letters-B-740-(2015)-118–136.pdf | 1,35 MB | Adobe PDF | Ver/Abrir |