Production of P^Λψ s(4338) from Ξb decay

In the present work, we investigate the production of the newly observed P^Λψ s(4338) state in Ξb⁻ decay, where the P^Λψ s(4338) is assigned as Ξc D̄ molecular state. By using an effective Lagrangian approach, we evaluate the branching fractions of Ξb⁻→ P^Λψ s(4338)K⁻ via the triangle loop mechanism. The branching fractions of Ξb⁻→ P^Λψ s(4338)K⁻ is in the order of 10⁻⁴, the result are compared with our previous work of Ξb⁻→ P^Λψ s(4459)K⁻. We also predict the ratio of P^Λψ s(4459) and P^Λψ s(4338) productions in the decay Ξb⁻ → P^Λψ s K⁻ → J/ψ Λ K⁻. The predicted branching fractions and their ratios could be tested experimentally, which may be helpful for understanding the molecular picture of P^Λψ s(4338) as well as other hidden-charm pentaquark states with strangeness. Moreover, the experimental potential of observing P^Λψ s(4338) in the Ξ⁻b→ K⁻ J/ψ Λ is discussed.