Abstract
In the present work, we investigate the productions of Z_{cs}^+ in B^+ and B_s^0 decays, where Z_{cs}^+ is assigned as a D_s^{+} {bar{D}}^{*0} + D_s^{*+}{bar{D}}^0 molecular state. By using an effective Lagrangian approach, we evaluate the branching fractions of B^0_srightarrow K^- Z^+_{cs} and B^+rightarrow phi Z^{+}_{cs} via the triangle loop mechanism. The estimated branching fractions of B^0_srightarrow K^- Z^+_{cs} and B^+rightarrow phi Z^{+}_{cs} are of the order of 10^{-4} and 10^{-5}, respectively. The ratio of these two branching fractions is estimated to be about 4, which indicate that the B_s^0 rightarrow K^pm Z^mp _{cs} rightarrow K^+ K^- J/psi may be a better process of searching Z_{cs} and accessible for further experimental measurements of the Belle II and LHCb Collaborations.
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