Decay constants of heavy vector mesons in relativistic Bethe-Salpeter method

In a previous Letter, we computed the decay constants of heavy pseudoscalar mesons in the framework of relativistic (instantaneous) Bethe-Salpeter method (full 0- Salpeter equation), in this Letter, we solve the full 1- Salpeter equation and compute the leptonic decay constants of heavy-heavy and heavy-light vector mesons. The theoretical estimate of mass spectra of these heavy-heavy and heavy-light vector mesons are also presented. Our results for the decay constants and mass spectra include the complete relativistic contributions. We find FDs*∼375+/-24, FD*∼340+/-23(D*0,D*+/-), FBs*∼272+/-20, FB*∼238+/-18(B*0,B*+/-), FBc*∼418+/-24, FJ/Ψ∼459+/-28, FΨ(2S)∼364+/-24, F-bar ∼498+/-20 and F-bar (2S)∼366+/- 27 MeV