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

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 ${\Xi }_c{\bar{D}}^{\ast }/{\Xi }_c^{\ast }\bar{D}/{\Xi }_c^{\prime }{\bar{D}}^{\ast }/{\Xi }_c^{\ast }{\bar{D}}^{\ast }$ 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 ${\Xi }_c{\bar{D}}^{\ast }$ molecule with $I(J^P)=0(3/2^{-})$. The relative decay ratio between ${\Lambda }_c{D}_s^{\ast }$ and $J/\psi \Lambda$ is around 10, where the partial decay width for the ${\Lambda }_c{D}_s^{\ast }$ channel is around 0.6 to 2.0 MeV.

Comments: 6 pages, 5 figures, Accepted by the EPJC