| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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The $\varOmega(2012)$ as a Hadronic Molecule |
| Ju-Jun Xie1,2,3* and Li-Sheng Geng4,5,6,3* |
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2School of Nuclear Sciences and Technology, University of Chinese Academy of Sciences, Beijing 101408, China
3Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, Huizhou 516000, China
4School of Physics, Beihang University, Beijing 102206, China
5Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 102206, China
6Peng Huanwu Collaborative Center for Research and Education, Beihang University, Beijing 100191, China
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| Cite this article: |
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Ju-Jun Xie and Li-Sheng Geng 2024 Chin. Phys. Lett. 41 081402 |
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Abstract Recently, a new excited baryon state, $\varOmega(2012)$, was observed in the invariant mass spectra of $K^-\varXi^0$ and $K^0_S \varXi^-$ by the Belle collaboration. This state has a narrow width ($\sim$ $6$ MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the $\varOmega(2012)$ 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 $\bar{K} \varXi(1530)$ and $\eta \varOmega$ in $s$-wave and $\bar{K} \varXi$ in $d$-wave. Additionally, alternative explanations for the $\varOmega(2012)$ resonance are also discussed.
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Received: 19 May 2024
Review
Published: 16 August 2024
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| PACS: |
14.20.Jn
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(Hyperons)
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11.10.St
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(Bound and unstable states; Bethe-Salpeter equations)
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12.38.Lg
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(Other nonperturbative calculations)
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