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.
Highlights
Very recently, the LHCb Collaboration reported the evidence of a possible hidden-charm pentaquark with strangeness Pcsð4459Þ by analyzing the Ξ−b → J=ψK−Λ process, where this enhancement structure existing in theJ=ψΛ invariant mass spectrum has the mass 4458.8 Æ 2.9þ−14..17 MeV and the width 17.3 Æ 6.5þ−58..70 MeV [1]
Inspired by the recent evidence of Pcsð4459Þ 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 Ξðc0;ÃÞ and an S-wave anticharmed-strange meson DðsÃÞ
In 2015, the LHCb Collaboration released the observation of Pcð4380Þ and Pcð4450Þ in the J=ψp invariant mass spectrum of the Λb → J=ψpK process [19]
Summary
The LHCb Collaboration reported the evidence of a possible hidden-charm pentaquark with strangeness Pcsð4459Þ by analyzing the Ξ−b → J=ψK−Λ process, where this enhancement structure existing in the. In 2019, based on more collected data, the LHCb Collaboration again analyzed the same process and found a new Pcð4312Þ and indicated that Pcð4450Þ contains two substructures Pcð4440Þ and Pcð4457Þ [20], which may provide strong evidence of hidden-charm molecular pentaquarks existing in nature [21–27]. With the extracted effective potentials, we may find the bound state solutions of the discussed systems, and further conclude whether there exist possible hidden-charm molecular pentaquarks with double strangeness. By this effort, we may give theoretical suggestion of performing the search for them in experiment. We mainly study the interactions between an S-wave charmed baryon Ξðc0;ÃÞ and an S-wave anticharmed-strange meson DðsÃÞ in the OBE model, we include the contribution from the pseudoscalar meson, scalar meson, and vector meson exchanges in our concrete calculation, which is often adopted to study the hadron interactions [28,29]
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