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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Hadronic resonances enhanced by thresholds

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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
Linha de fomento: Auxílio à Pesquisa - Regular