| Full text | |
| Author(s): |
El-Bennich, Bruno
;
Ivanov, Mikhail A.
;
Roberts, Craig D.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW C; v. 83, n. 2, p. 5-pg., 2011-02-14. |
| Abstract | |
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) | |
| FAPESP's process: | 10/05772-3 - Hadronic effects in heavy-quark physics |
| Grantee: | Bruno Omar El Bennich |
| Support Opportunities: | Scholarships in Brazil - Young Researchers |
| FAPESP's process: | 09/51296-1 - Hadronic effects in heavy-quark physics |
| Grantee: | Bruno Omar El Bennich |
| Support Opportunities: | Research Grants - Young Investigators Grants |