Feasibility of the experimental study of $D_{s}^{\ast}$ ${\to}$ $ϕπ$ decay

Abstract

The current knowledge on the D * s meson are very limited. Besides the dominant electromagnetic decays, the D * s weak decays are legal and offer the valuable opportunities to explore the wanted D * s meson. In this paper, the D * s → φπ decay was studied with the PQCD approach. It is found that the branching ratio B(D * s →φπ) ∼ O(10 −7 ), which corresponds to several thousands of events at the e + e − collider experiments including STCF, SuperKEKB, CEPC and FCC-ee, and several millions of events at the hadron collider experiments, such as LHCb@HL-LHC. It is feasible to experimentally study the D * s → φπ weak decay in the future.