The weak B, B_s and B_c decays to radially excited states

Recently, many new excited states of heavy mesons have been discovered, especially radially excited states. It draws interest to study the production processes of these states from the ground b-flavored mesons. In this paper, we use the improved Bethe-Salpeter method to study the semi-leptonic and non-leptonic decays of B, B _s, and B _c mesons. The calculations mostly focus on the decay channels with the radially excited 2S and 3S final states. We find that many channels have branching ratios up to 10⁻⁴, which are within the detection accuracy of current experiments. (paper)