Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/57577
Título: | Measurement of Top Quark Polarization in Top-Antitop Events from Proton- Proton Collisions at root s=7 TeV Using the ATLAS Detector |
Autor(es): | Castro, Nuno Filipe Onofre, A. ATLAS Collaboration |
Data: | 2013 |
Editora: | American Physical Society |
Revista: | Physical Review Letters |
Resumo(s): | This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4: 7 fb(-1) of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at root s = 7 TeV. Final states containing one or two isolated leptons ( electrons or muons) and jets are considered. Two measurements of alpha P-l, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving or a maximally CP violating production process. The measurements obtained, alpha P-l(CPC) = -0: 035 +/- 0: 014(stat) +/- 0: 037(syst) and alpha P-l(CPV) = 0: 020 +/- 0: 016(stat)(-0.017)(+0.013)(syst), are in good agreement with the standard model prediction of negligible top quark polarization. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/57577 |
DOI: | 10.1103/PhysRevLett.111.232002 |
ISSN: | 0031-9007 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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PhysRevLett.111.232002.pdf | 528,67 kB | Adobe PDF | Ver/Abrir |