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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hadronic resonances enhanced by thresholds

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Carames, T. F. ; Valcarce, A. [1]
Total Authors: 2
[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

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