Bs → ρ(ω)K* with the perturbative QCD approach

Abstract

Bs → ρ(ω)K* decays are useful to determine the Bs distribution amplitude, as well as constrain the CKM phase angle α. We study these decays within the perturbative QCD approach. In this approach, we derive factorizable and non-factorizable diagrams, as well as annihilation diagrams. We find that the branching ratio for Bs → ρ+K*− is of the order of 10−5 and there is a large direct CP violation in . Our predictions are consistent with those from other methods and current experiments.