Can the newly $P_{cs}(4459)$ be a strange hidden-charm ${\Xi }_c{\bar{D}}^{\ast }$ molecular pentaquarks?

Abstract

Stimulated by the $P_{cs}(4459)$ reported by the LHCb Collaboration, we perform a single ${\Xi }_c{\bar{D}}^{\ast }$ channel and a coupled ${\Xi }_c{\bar{D}}^{\ast }/{\Xi }_c^{\ast }\bar{D}/{\Xi }_c^{\prime }{\bar{D}}^{\ast }/{\Xi }_c^{\ast }{\bar{D}}^{\ast }$ channel analysis by using a one-boson-exchange model. Our results indicate that the newly $P_{cs}(4459)$ cannot be a pure ${\Xi }_c{\bar{D}}^{\ast }$ molecular state, but a coupled ${\Xi }_c{\bar{D}}^{\ast }/{\Xi }_c^{\ast }\bar{D}/{\Xi }_c^{\prime }{\bar{D}}^{\ast }/{\Xi }_c^{\ast }{\bar{D}}^{\ast }$ bound state with $I(J^P)=0(3/2^{-})$, where the ${\Xi }_c{\bar{D}}^{\ast }$ and ${\Xi }_c^{\ast }\bar{D}$ components are dominant. Meanwhile, we find the interactions from the ${\Xi }_c^{\prime }{\bar{D}}^{\ast }$ system with $0(1/2^{-})$, the ${\Xi }_c^{\ast }\bar{D}$ system with $1(3/2^{-})$, and the ${\Xi }_c^{\ast }{\bar{D}}^{\ast }$ system with $1(1/2^{-})$ are strongly attractive, where one can expect possible strange hidden-charm molecular or resonant structures near the these thresholds with the assigned quantum numbers.

arXiv comment7 Pages, 2 figures

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