Analysis of Tau and heavy meson hadronic decays and neutrino-nucleus interactions,...
| Full text | |
| Author(s): |
Carames, T. F.
;
Valcarce, A.
[1]
Total Authors: 2
|
| Affiliation: | [1] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca - Spain
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Physics Letters B; v. 758, p. 244-248, JUL 10 2016. |
| Web of Science Citations: | 5 |
| Abstract | |
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) | |
| FAPESP's process: | 15/50326-5 - Charmed hadron physics |
| Grantee: | Gastão Inácio Krein |
| Support type: | Regular Research Grants |