Analysis of the B-q -> D-q(D-q*)P and B-q -> D-q(D-q*)V Decays Within the factorization approach in QCD

Abstract

Using the factorization approach and considering the contributions of the current-current, QCD penguin and electroweak penguin operators at the leading approximation, the decay amplitudes and decay widths of B-q -> D-q(D-q*)P and B-q -> D-q(D-q*)V transitions, where q = u, d, s and P and V are pseudoscalar and vector mesons, are calculated in terms of the transition form factors of the B-q -> D-q and B-q -> D-q*. Having computed those form factors in three-point QCD sum rules, the branching fraction for these decays are also evaluated. A comparison of our results with the predictions of the perturbative QCD as well as the existing experimental data is presented.