The Ω(2012) as a hadronic molecule

2024/06/25 by Ju-Jun Xie, Li‐Sheng Geng, Xie, Ju-Jun +1 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Cold Fusion and Nuclear Reactions #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2406.17481

openalex publication_date 2024/06/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Recently, a new excited baryon state, Ω(2012), was observed in the invariant mass spectra of K^-Ξ⁰ and K⁰_S 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 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.

Cited by

• Improved prediction of the mass splitting for P-wave Ω baryons
• Structure of the Ω^-(2012) with Hamiltonian Effective Field Theory

Related

• Radiative decays of the Ω(2012) as a hadronic molecule
• Observation of the Ω(2012) baryon at the LHC
• Strong decays of the hadronic molecule Ω * (2012)
• Investigation on the Ω(2012) from QCD sum rules
• Structure of the Ω^-(2012) with Hamiltonian Effective Field Theory