Analysis of Bs→KK decays in the PQCD

We study Bs→KK decays in the framework of the PQCD. We show that the branching ratios of Bs→(K+K−,K0K̄0) are about (22.43,25.78)×10−6 for φ3(γ)≃72°, which are consistent with the model-independent estimations. We find that the typical scale of the decays is near 1.7 GeV. We also point out that the induced strong phase δ is around 207° so that the direct CP asymmetry of Bs→K+K− could reach 15%.