Prediction of hidden-charm pentaquarks with double strangeness

Inspired by the recent evidence of $P_{cs}(4459)$ reported by LHCb, we continue to perform the investigation of hidden-charm molecular pentaquarks with double strangeness, which are composed of an $S$-wave charmed baryon ${\mathrm{\Xi }}_c^{(\prime ,*)}$ and an $S$-wave anticharmed-strange meson ${\overline{D}}_s^{(*)}$. Both the $S\text{−}D$ wave mixing effect and the coupled channel effect are taken into account in realistic calculation. A dynamics calculation shows that there may exist two types of hidden-charm molecular pentaquark with double strangeness, i.e., the ${\mathrm{\Xi }}_c^{*}{\overline{D}}_s^{*}$ molecular state with $J^P=5/2^{-}$ and the ${\mathrm{\Xi }}_c^{\prime }{\overline{D}}_s^{*}$ molecular state with $J^P=3/2^{-}$. According to this result, we strongly suggest the experimental exploration of hidden-charm molecular pentaquarks with double strangeness. Facing such opportunity, obviously the LHCb will have great potential to hunt for them, with the data accumulation at Run III and after High-Luminosity-LHC upgrade.

Figure 1

The hidden-charm pentaquark zoo with different values of strangeness.

Figure 2

The production process involved in the predicted hidden-charm pentaquarks with double strangeness.