Branching ratio and CP-asymmetry of Bs→ρ(ω)K decays in the perturbative QCD approach

Abstract

In this paper, we calculate the branching ratios and CP-violating asymmetries for Bs→ρ±K∓, ρ0K̄0 and ωK̄0 decays in the perturbative QCD factorization approach. The theoretical predictions for the CP-averaged branching ratios of the considered decays are Br(Bs→ρ±K∓)≈24.7×10-6, Br(Bs→ρ0K̄0)≈1.2×10-7 and Br(Bs→ωK̄0)≈1.7×10-7; and we also predict large CP-violating asymmetries for the considered decay modes. Specifically, the large ACP dir(Bs→ρ±K∓) at -12% level plus large branching ratio at 10-5 level are measurable in the forthcoming LHC-b experiments.