The B\to D_s^{(*)}\pi decays in the perturbative QCD

TL;DR

This paper calculates branching ratios for specific B meson decays using perturbative QCD, showing good agreement with experimental data and updating key parameters for D_s^{*} mesons.

Contribution

The paper provides new calculations of B to D_s^{(*)}π decay branching ratios within perturbative QCD, incorporating updated decay constants and shape parameters.

Findings

Calculated branching ratios agree with experimental measurements.

Updated decay constant and shape parameter for D_s^{*} meson.

Supports perturbative QCD as a reliable approach for these decays.

Abstract

In this paper, we calculate the branching ratios for B^0\to D_s^+\pi^-, B^+\to D_s^+\pi^0, B^0\to D_s^{*+}\pi^- and B^+\to D_s^{*+}\pi^0 decays in the perturbative QCD factorization approach. We find that the calculated branching ratios of these four decay channels agree well with the measured values and current experimental upper limit. In the numerical calculation, we take the decay constant and the shape parameter of the vector meson D^{*}_s as f_{D^{*}_s}=312 MeV and a_{D^{*}_s}=0.78 respectively, which are larger than those in the previous calculations.