Triple-strangeness hidden-charm pentaquarks

We investigate the possible existence of triple-strangeness hidden-charm pentaquark states in the off-shell coupled-channel formalism. The open-charm meson-baryon D̄ₛΩc, D̄ₛΩc^*, D̄ₛ^*Ωc, and D̄ₛ^*Ωc^* channels are considered, together with the hidden-charm $J/ψΩ$ channel. The two-body kernel Feynman amplitudes are constructed from an effective Lagrangian based on hidden local symmetry and heavy-quark spin symmetry. The coupled Blankenbecler-Sugar equation is solved in the partial-wave helicity basis. We observe two triple-strangeness hidden-charm pentaquark states: Pcc̄sss(4787) and Pcc̄sss(4841), both with JP=1/2⁻. The Pcc̄sss(4787) couples dominantly to the D̄ₛ^*Ωc and D̄ₛ^*Ωc^* channels, while the Pcc̄sss(4841) couples almost exclusively to the D̄ₛ^*Ωc^* channel. The total transition cross sections of D̄ₛ⁽⁾Ωc⁽⁾→ J/ψ\,Ω indicate that the Pcc̄sss(4787) is clearly visible in the $J/ψ\,Ω$ invariant mass spectrum, whereas the Pcc̄sss(4841) is obscured by cusp structures and background contributions.