Pseudo-scalar heavy meson decays in covariant light front dynamics

We investigate the leptonic decay amplitude of heavy pseudo-scalar mesons as well as the B to D transition amplitude in the heavy quark limit, using the covariant formulation of light-front dynamics. The explicit rotational invariance of this formalism enables us to recover the analytic results obtained for these processes using the Bakamjian-Thomas construction in equal time dynamics, in the limit of an infinitely heavy mass. The covariant formulation provides a very convenient and coherent framework for calculating the 1/m corrections.