Electroweak penguin effects in some Bs0 two-body decays

Using the next-to-leading order low energy effective Hamiltonian for ΔB = 1 transitions, the effects of electroweak penguin operators in some two-body decay modes of Bs0 meson are estimated in the Standard Model (SM). We find that in Bs0 → π+K− and Bs0 → K+K− decay modes, the electroweak penguin effects are small, while in Bs0 → π0K0, φK0, φφ, the electroweak penguin operators enhance or reduce the pure QCD penguin and tree level contributions by 20%–80% in decay width. We also present the results of CP asymmetries in these Bs0 decay modes.