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Understanding the nature of $\Omega(2012)$ in a coupled-channel approach
- Publication Year :
- 2022
-
Abstract
- We perform a systematic analysis of the mass and strong decays of the $\Omega(2012)$ resonance in a coupled-channel approach of a bare three-quark state and a composite meson-baryon state. Besides the coupling of the bare state and $\Xi^* \bar K$ channel, the effective meson-baryon interactions are also included. We find a pole with mass of $2008$ MeV by solving the Bethe-Salpeter equation. The calculated decay widths and its ratios of branching fractions $\mathcal {R}_{\Xi \bar K}^{\Xi \pi \bar K}$ agree well with the new experimental measurement by Belle Collaboration. Our results suggest that both three-quark core and $\Xi^* \bar K$ channel are essential for the description of the $\Omega(2012)$ resonance. We expect that present calculations can help us to better understand the nature of $\Omega(2012)$ resonance.<br />Comment: 9 pages, 4 figures. Minor modifications, accepted version
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2212.02783
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.107.014025