| Texto completo | |
| Autor(es): |
El-Bennich, Bruno
;
Ivanov, Mikhail A.
;
Roberts, Craig D.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW C; v. 83, n. 2, p. 5-pg., 2011-02-14. |
| Resumo | |
We compute g(D*D pi) and g(B*B pi) using a framework in which all elements are constrained by Dyson-Schwinger equation studies of QCD and therefore incorporates a consistent, direct, and simultaneous description of light and heavy quarks and the states they may constitute. We link these couplings with the heavy-light-meson leptonic decay constants and thereby obtain g(D*D pi) = 15.9(-1.0)(+2.1) and g(B*B pi) = 30.0(-1.4)(+3.2). From the latter, we infer (g) over cap (B) = 0.37(-0.02)(+0.04). A comparison between g(D*D pi) and g(B*B pi) indicates that when the c quark is a system's heaviest constituent, Lambda(QCD)/m(c)-corrections are not under good control. (AU) | |
| Processo FAPESP: | 10/05772-3 - Efeitos hadrônicos na física dos quarks pesados |
| Beneficiário: | Bruno Omar El Bennich |
| Modalidade de apoio: | Bolsas no Brasil - Jovens Pesquisadores |
| Processo FAPESP: | 09/51296-1 - Efeitos hadrônicos na física dos quarks pesados |
| Beneficiário: | Bruno Omar El Bennich |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |