Decay properties of multistrangeness $\mathrm{\Xi }$ and $\mathrm{\Omega }$ baryon resonances are investigated within the constituent quark model by including relativistic corrections. The strong decay widths of various $\mathrm{\Xi }$ and $\mathrm{\Omega }$ resonances are computed and tested for internal quark configurations to pin down their spin-parity ($J^P$) quantum numbers and internal structures. We found that the Roper-like resonances in the multistrangeness sector have large decay widths bearing resemblances to their siblings in light and heavy baryon sectors. In addition, we obtained the decay ratio for the $\mathrm{\Omega }(2012)$ as $\mathrm{\Gamma }(\mathrm{\Omega }\to \mathrm{\Xi }\overline{K}\pi )/\mathrm{\Gamma }(\mathrm{\Omega }\to \mathrm{\Xi }\overline{K})=4.5\%$, which is consistent with the experimental data when $J^P=3/2^{-}$ is assigned. This observation holds the possibility that the $\mathrm{\Omega }(2012)$ could naturally be explained as a three-quark state in the quark model. The decays of other low-lying $\mathrm{\Xi }$ and $\mathrm{\Omega }$ resonances are systematically analyzed, which would be useful to unveil the structure of these resonances in future experiments.

• Received 26 January 2022
• Accepted 22 April 2022

DOI:https://doi.org/10.1103/PhysRevD.105.094006

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Published by the American Physical Society