Analysis of the $B_q\to D_q(D_q^*) P$ and $B_q\to D_q(D_q^*) V$ decays within the factorization approach in QCD

TL;DR

This paper calculates decay amplitudes and branching ratios for specific B meson decays using the factorization approach in QCD, incorporating various operators and form factors, and compares results with other models and experimental data.

Contribution

It introduces a detailed calculation of B meson decay processes using three-point QCD sum rules within the factorization framework, including penguin contributions.

Findings

Calculated decay widths and branching ratios for B_q decays.

Compared results with perturbative QCD predictions.

Aligned theoretical results with experimental data.

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 $B_q\to D_q(D_q^*) P$ and $B_q\to D_q(D_q^*) V$ 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 $B_q\to D_{q}$ and $B_q\to D^{*}_{q}$. 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.