Author:
Xie 谢 Ju-Jun 聚军,Geng 耿 Li-Sheng 立升
Abstract
Abstract
Recently, a new excited baryon state, Ω(2012), was observed in the invariant mass spectra of
K
−
Ξ
0
and
K
S
0
Ξ
−
by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, 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
K
¯
Ξ
(
1530
)
and ηΩ in s-wave and
K
¯
Ξ
in d-wave. Additionally, alternative explanations for the Ω(2012) resonance are also discussed.