Production of $$Z_{cs}$$ in B and $$B_s$$ decays

Abstract

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