In the present work, we investigate the spectrum of several low-lying $sscq\overline{q}$ pentaquark configurations employing the constituent quark model, within which the hyperfine interaction between quarks is taken to be mediated by Goldstone boson exchange. Our numerical results show that four $sscq\overline{q}$ configurations with $J^P=1/2^{-}$ or $J^P=3/2^{-}$ lie at energies very close to the recently observed five ${\mathrm{\Omega }}_c^0$ states by the LHCb Collaboration; this indicates that the $sscq\overline{q}$ pentaquark configurations may form sizable components of the observed ${\mathrm{\Omega }}_c^0$ resonances.

• Received 21 May 2017

DOI:https://doi.org/10.1103/PhysRevD.96.034012