Compact $sssc\bar{c}$ pentaquark states predicted by a quark model

Understand

Several compact $sssc\bar c$ pentaquark resonances are predicted in a potential quark model.

• The Hamiltonian is the best available one, which reproduces the masses of the low-lying charmed and strange hadrons well.
• Full five-body calculations are carried out by the use of the Gaussian expansion method, and the relevant baryon-meson thresholds are taken into account explicitly.
• Employing the real scaling method, we predict four sharp resonances, $J^P=1/2^-$ ($E=5180$ MeV, $\Gamma=20$ MeV), $5/2^-$ (5645 MeV, 30 MeV), $5/2^-$ (5670 MeV, 50 MeV), and $1/2^+$ (5360 MeV, 80 MeV).