We study the wave functions and purely leptonic decays of b -flavored mesons (pseudoscalars, vector mesons, and higher excited states that are well established in experiment) in the relativistic potential model based on our previous works. The wave functions are obtained by solving the wave equation including the spin-spin and spin-orbit corrections in the effective potential. The decay constants of B , B * , and some of their excited states that have been found in experiment are calculated with these wave functions. Then the branching fractions of the purely leptonic decay modes of these bottom mesons are studied. Our results are well in agreement with experimental data for decay modes that have been measured in experiments. We also provide predictions for some yet unmeasured channels, which are useful for experimental testing in the future.
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