We investigate the possible existence of triple-strangeness hidden-charm pentaquark states in the off-shell coupled-channel formalism. The open-charm meson-baryon ${\overline{D}}_s{\mathrm{\Omega }}_c$, ${\overline{D}}_s{\mathrm{\Omega }}_c^{*}$, ${\overline{D}}_s^{*}{\mathrm{\Omega }}_c$, and ${\overline{D}}_s^{*}{\mathrm{\Omega }}_c^{*}$ channels are considered, together with the hidden-charm $J/\psi \mathrm{\Omega }$ 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: $P_{c\overline{c}sss}(4787)$ and $P_{c\overline{c}sss}(4841)$, both with $J^P=1/2^{-}$. The $P_{c\overline{c}sss}(4787)$ couples dominantly to the ${\overline{D}}_s^{*}{\mathrm{\Omega }}_c$ and ${\overline{D}}_s^{*}{\mathrm{\Omega }}_c^{*}$ channels, while the $P_{c\overline{c}sss}(4841)$ couples almost exclusively to the ${\overline{D}}_s^{*}{\mathrm{\Omega }}_c^{*}$ channel. The total transition cross sections of ${\overline{D}}_s^{(*)}{\mathrm{\Omega }}_c^{(*)}\to J/\psi \mathrm{\Omega }$ indicate that the $P_{c\overline{c}sss}(4787)$ is clearly visible in the $J/\psi \mathrm{\Omega }$ invariant mass spectrum, whereas the $P_{c\overline{c}sss}(4841)$ is obscured by cusp structures and background contributions.

Close

PrevNext

Reuse & PermissionsView figure in article

• 
• 
• 
• 
• 
• 

• Baryons
• Exotic baryons
• Mass
• Parity