Strong decays of the P_cs(4459) as a $\Xi_{c}\bar{D}^{\ast}$ molecule

Abstract

In this work, we study the strong decay of the newly observed P_cs(4459), assuming that it is a pure $\Xi_{c}\bar{D}^{\ast}$ molecular state. Considering two possible spin-parity assignments J^P = 1/2⁻ and J^P = 3/2⁻, the partial decay widths of the $\Xi_{c}\bar{D}^{\ast}$ molecular state into J/ψΛ, D ⁻_s Λ ⁺_c , and $\bar{D}\Xi_{c}^{(\prime)}$ final states through hadronic loops are evaluated with the help of the effective Lagrangians. In comparison with the LHCb data, the S-wave $\bar{D}^{\ast}\Xi_{c}$ molecular with J^P = 1/2⁻ assignment for P_cs(4459) is supported by our study, while the P_cs(4459) in spin-parity J^P = 3/2⁻ case may be explained as an S-wave coupled bound state with lager $\Xi_{c}\bar{D}^{\ast}$ component. In addition, the calculated partial decay widths with J^P = 1/2⁻ $\Xi_{c}\bar{D}^{\ast}$ molecular state picture indicate that allowed decay mode, $\bar{D}^{\ast}\Xi_{c}^{\prime}$, may have the biggest branching ratio. The experimental measurements for this strong decay process could be a crucial test for the molecule interpretation of the P_cs(4459).