Prediction of hidden-charm pentaquarks with double strangeness

TL;DR

This paper predicts the possible existence of hidden-charm pentaquarks with double strangeness, based on theoretical calculations considering wave mixing and coupled channels, encouraging experimental searches at LHCb.

Contribution

It introduces a realistic dynamical model predicting two specific double-strangeness hidden-charm pentaquark states, incorporating wave mixing and coupled channel effects.

Findings

Two potential pentaquark states identified: $oldsymbol{ ext{Xi}_c^{*}ar D_s^*}$ with $J^P=5/2^-$

Another state: $oldsymbol{ ext{Xi}_c^{\prime}ar D_s^*}$ with $J^P=3/2^-$

Strong encouragement for experimental search at LHCb.

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 $\Xi_c^{(\prime,*)}$ and an $S$-wave anti-charmed-strange meson $\bar{D}_s^{(*)}$. Both the $S$-$D$ 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 $\Xi_{c}^{*}\bar D_s^*$ molecular state with $J^P={5}/{2}^{-}$ and the $\Xi_{c}^{\prime}\bar D_s^*$ 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.