| Texto completo | |
| Autor(es): |
Carames, T. F.
;
Valcarce, A.
[1]
Número total de Autores: 2
|
| Afiliação do(s) autor(es): | [1] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca - Spain
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physics Letters B; v. 758, p. 244-248, JUL 10 2016. |
| Citações Web of Science: | 5 |
| Resumo | |
We present a neat example of a meson-baryon system where the vicinity of two different thresholds enhances the binding of a hadronic resonance, a pentaquark. As a consequence the pattern of states may change when moving among different flavor sectors, what poses a warning on naive extrapolations to heavy flavor sectors based on systematic expansions. For this purpose we simultaneously analyze the N (D) over bar and NB two-hadron systems looking for possible bound states or resonances. When a resonance is controlled by a coupled-channel effect, going to a different flavor sector may enhance or diminish the binding. This effect may, for example, generate significant differences between the charmonium and bottomonium spectra above open-flavor thresholds or pentaquark states in the open-charm and open-bottom sectors. (C) 2016 The Authors. Published by Elsevier B.V. (AU) | |
| Processo FAPESP: | 15/50326-5 - Charmed hadron physics |
| Beneficiário: | Gastão Inácio Krein |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |