Brazilian Journal of Physics
Print version ISSN 0103-9733
On-line version ISSN 1678-4448
DURAES, F. O.; NAVARRA, F.S.; NIELSEN, M. and ROBILOTTA, M.R.. Meson loops and the gD*Dp coupling. Braz. J. Phys. [online]. 2006, vol.36, n.4a, pp.1232-1237. ISSN 0103-9733. http://dx.doi.org/10.1590/S0103-97332006000700021.
The D*Dp form factor is evaluated at low and moderate Q2 in a hadronic loop model, for off-shell D mesons. The results contain arbitrary constants, which are fixed so as to match a previous QCD sum rule calculation valid at higher Q2. The form factor obtained in this way is used to extract the coupling constant, which is in very good agreement with the experimental value.
Keywords : Effective Lagrangian; Chiral symmetry; Hadronic loop model; Heavy form factor; QCD sum rule.