Strong decays of the newly $P_{cs}(4459)$ as a strange hidden-charm $\Xi_c\bar{D}^*$ molecule

TL;DR

This paper investigates the strong decay behaviors of the $P_{cs}(4459)$, supporting its interpretation as a strange hidden-charm $ ext{Xi}_car{ ext{D}}^*$ molecule with specific quantum numbers, based on molecular scenario calculations.

Contribution

It provides the first detailed decay analysis of the $P_{cs}(4459)$ as a molecular state, confirming its structure and decay ratios within the meson-baryon molecular framework.

Findings

Supports $P_{cs}(4459)$ as a $ ext{Xi}_car{ ext{D}}^*$ molecule with $I(J^P)=0(3/2^-)$.

Predicts a decay ratio of about 10 between $ ext{Lambda}_c D_s^*$ and $J/ ext{psi} ext{Lambda}$ channels.

Partial decay width for $ ext{Lambda}_c D_s^*$ is estimated between 0.6 and 2.0 MeV.

Abstract

In our former work [arXiv:2011.07214], the $P_{cs}(4459)$ observed by the LHCb Collaboration can be explained as a coupled strange hidden-charm $\Xi_c\bar{D}^*/\Xi_c^*\bar{D}/\Xi_c'\bar{D}^*/\Xi_c^*\bar{D}^*$ molecule with $I(J^P)=0(3/2^-)$. Here, we further discuss the two-body strong decay behaviors of the $P_{cs}(4459)$ in the meson-baryon molecular scenario by input the former obtained bound solutions. Our results support the $P_{cs}(4459)$ as the strange hidden-charm $\Xi_c\bar{D}^*$ molecule with $I(J^P)=0(3/2^-)$. The relative decay ratio between $\Lambda_cD_s^*$ and $J/\psi\Lambda$ is around 10, where the partial decay width for the $\Lambda_cD_s^*$ channel is around 0.6 to 2.0 MeV.