B_s→ φπ⁰Decay in the Extra Down-Type Quark Model

Using the QCD factorization approach, we investigate the electro-weak penguin dominated process B_s→φπ⁰ in the extra down-type quark (EDQS) model. We calculate the effects of new physics (NP) on the branching fraction and direct CP asymmetry of the decay mode. It is found that the branching fraction can be increased by 15% points or dropped by 13% points than the standard model (SM) value, and its direct CP asymmetry can be increased by 35% points or dropped by 37% points than the SM one. The effects of NP on the direct CP asymmetry are more obvious than on the branching fraction. If this decay mode could be measured in the upcoming LHCb experiment, these results we obtain will be useful for further studies of the EDQS model.