Dynamical study of hidden-strange pentaquarks as analogs of the hidden-charm states

Motivated by the recent BESIII experiment~BESIII: 2024muk searching for hidden-strange exotic hadrons, we perform a systematic theoretical study of the hidden-strange pentaquark system within the framework of the quark delocalization color screening model (QDCSM) and the resonating group method (RGM). Our results demonstrate that the channel coupling effect plays a decisive role in the formation of bound and resonance states. It not only significantly enhances the short-range attraction but also induces essential attractive contributions from pion exchange. We predict three bound states with masses of 1759 MeV, 2000 MeV, and 2407 MeV. Furthermore, we report the existence of a hidden-strange pentaquark resonance state, ΞK^, with quantum numbers I (J^P) =0 (1/2^-). This resonance is identified in the S-wave scattering phase shifts of the Ληₒ and Λϕ open channels, with a predicted mass in the range of 2204--2208 MeV. By accounting for both the scattering width from channel coupling and the intrinsic decay width of the constituent K^, the total decay width is estimated to be 55--63 MeV. These theoretical predictions provide important guidance for future experimental searches for such exotic states at facilities like BESIII.