${\mathrm{\Omega }}_{cc}$ resonances with negative parity in the chiral constituent quark model

Spectrum of the low-lying ${\mathrm{\Omega }}_{cc}$ resonances with negative parity, which are assumed to be dominated by $sccq\overline{q}$ pentaquark components, is investigated using the chiral constituent quark model. Energies of the ${\mathrm{\Omega }}_{cc}$ resonances are obtained by considering the hyperfine interaction between quarks by exchanging a Goldstone boson. Possible $sccq\overline{q}$ configurations with spin-parity $1/2^{-}$, $3/2^{-}$, and $5/2^{-}$ are taken into account. Numerical results show that the lowest ${\mathrm{\Omega }}_{cc}$ resonances with negative parity may lie at $4050\pm 100\mathrm{MeV}$. In addition, the transitions of the ${\mathrm{\Omega }}_{cc}$ resonance to a pseudoscalar meson and a ground baryon state are also investigated within the chiral Lagrangian approach. We expect that these ${\mathrm{\Omega }}_{cc}$ resonances could be observed in the $D{\mathrm{\Xi }}_c$ channel by future experiments.

Figure 1

Transitions of the $sccq\overline{q}$ states to $\overline{K}{\mathrm{\Xi }}_{cc}$ (${\mathrm{\Xi }}_{cc}^{*}$) (a) and $D{\mathrm{\Xi }}_c$ (${\mathrm{\Xi }}_c^{*}$) (b).

Figure 2

Spectrum of the obtained physical states.