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In the present work, we investigate the productions of the molecular statescomposed of $D^{(*)}_s \bar{D}^{(*)}$ and $D^{(*)}_s \bar{D}^{(*)}_s$ in the$B$ and $B_s$ decays by using an effective Lagrangian approach. The branchingratios in terms of the model parameter $\alpha$ and the binding energy $\DeltaE$ are estimated. Our estimations indicate that the branching fractions are ofthe order of $10^{-4}$ and the relative ratios are very weakly dependent on themodel parameter $\alpha$ and the binding energy $\Delta E$. The predictedratios are helpful for searching the hidden-charm molecular states with strangequark in the future experiments at Belle II and LHCb.

Hunting for the hidden-charm molecular states with strange quark in $B$ and $B_s$ decays