Bethe-Salpeter wave functions and transition amplitudes for heavy mesons

The most general form of covariant B-S wave functions and the corresponding integral equations for heavy mesons with arbitrary spin and parity are obtained in the infinite mass limit. A general formula for the I-W functions for transitions between states with arbitrary spin-parity and the ground state is given in terms of these wave functions. Using the covariant instantaneous approximation we apply this formulism to calculate I-W functionsr _1/2,r _3/2 and rates of processes in which a or is emitted in the transitions 1^–0^–, 0⁺0^–, 1⁺1^–.