Recently, a new excited baryon state, Ω(2012), was observed in the invariant mass spectra of K⁻Ξ⁰ and K⁰S Ξ⁻ by the Belle Collaboration. This state has a narrow width (~ 6 MeV) compared to other baryon states with a similar mass. In this paper, we provide a mini-review on the Ω(2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2⁻ from the coupled-channels interactions of the K̄ Ξ(1530) and η Ω in s-wave and K̄ Ξ in d-wave. Additionally, alternative explanations for the Ω(2012) resonance are also discussed.
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Xie et al. (2024) studied this question.
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