Strong two-meson decays of light and charmed vector mesons

We calculate the strong decay couplings for rho -> pi pi, phi -KK, K*-> K pi, and D*-> D pi in a unified and consistent approach based on the impulse approximation, nonperturbative solutions of the quark-gap equation and the Poincare invariant Bethe-Salpeter amplitudes of vector and pseudoscalar mesons. In particular, we obtain the coupling gD*D pi = 17.24(-2.30)(3.06) in very good agreement with the experimental value by CLEO, which corresponds to a strong effective coupling between heavy vector and pseudoscalar mesons to the pion of (g) over cap = 0.58(-0.08) (0.10) .

Automated summary

We calculate the strong decay couplings for rho -> pi pi, phi -KK, K*-> K pi, and D*-> D pi using the impulse approximation, nonperturbative solutions of the quark-gap equation and the Poincare invariant Bethe-Salpeter amplitudes of vector and pseudoscalar mesons. We obtain the coupling gD*D pi = 17.24(-2.30)(3.06) in very good agreement with the experimental value by CLEO, corresponding to a strong effective coupling between heavy vector and pseudoscalar mesons to the pion of (g) over cap = 0.58(-0.08) (0.10) .