B_s \to ρ(ω) K^* with Perturbative QCD approach

Details B_s \to ρ(ω) K^* with Perturbative QCD approach B_s \to ρ(ω) K^* with Perturbative QCD approach

2005-06-30

arxiv.org/abs/hep-ph/0506316v2

J.Phys. G32 (2006) 101-110

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures

Scientific paper

10.1088/0954-3899/32/2/004

$B_s \to \rho(\omega) K^{\ast}$ are useful to determine the $B_s$ distribution amplitude, as well as constrain the CKM phase angle $\alpha$. We study these decays within the Perturbative QCD (PQCD) picture. In this approach, we calculate factorizable, non-factorizable, as well as annihilation diagrams. We find the branching ratio for $B_s \to \rho^+ K^{*-}$ is big to order $10^{-5}$, we also find there's large direct CP violation in $B_s(\bar B_s) \to \rho^0(\omega) \bar K^{*0}(K^{*0})$. Our predictions are consistent with those from other methods and current experiments.

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