Prediction of hidden-charm pentaquarks with double strangeness
Fu-Lai Wang, Rui Chen, Xiang Liu
Abstract
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 ${\mathrm{\ensuremath{\Xi}}}_{c}^{(\ensuremath{'},*)}$ and an $S$-wave anticharmed-strange meson ${\overline{D}}_{s}^{(*)}$. Both the $S\text{\ensuremath{-}}D$ 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 ${\mathrm{\ensuremath{\Xi}}}_{c}^{*}{\overline{D}}_{s}^{*}$ molecular state with ${J}^{P}=5/{2}^{\ensuremath{-}}$ and the ${\mathrm{\ensuremath{\Xi}}}_{c}^{\ensuremath{'}}{\overline{D}}_{s}^{*}$ molecular state with ${J}^{P}=3/{2}^{\ensuremath{-}}$. 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.