Inspired by the newly observed $\mathrm{\Omega }(2012)$ state at Belle II, we investigate the two-body strong decays of $\mathrm{\Omega }$ baryons up to $N=2$ shell within the chiral quark model. Our results indicate that (i) the newly observed $\mathrm{\Omega }(2012)$ state could be assigned to the spin-parity $J^P=3/2^{-}$ state $|{70,}^{2}10,1,1,{\frac{3}{2}}^{-}⟩$ and the experimental data can be reasonably described. However, the spin-parity $J^P=1/2^{-}$ state $|{70,}^{2}10,1,1,{\frac{1}{2}}^{-}⟩$ and spin-parity $J^P=3/2^{+}$ state $|{56,}^{4}10,2,0,{\frac{3}{2}}^{+}⟩$ cannot be completely excluded. (ii) The $D$-wave states in the $N=2$ shell are most likely to be narrow states with a width of dozens of MeV and have a good potential to be observed in the $\mathrm{\Xi }K$ and/or $\mathrm{\Xi }(1530)K$ channels in future experiments. The $\mathrm{\Omega }(2250)$ resonance listed in PDG may be a good candidate for the $J^P=5/2^{+}$ $1D$ wave state $|{56,}^{4}10,2,2,5/2^{+}⟩$.

• Received 5 June 2018

DOI:https://doi.org/10.1103/PhysRevD.98.034004

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Published by the American Physical Society