Identifying the two-pole structure of the Λ ( 1405 ) using an SU(3) flavor filter
Abstract
We propose a novel method to identify the two-pole structure of the Λ ( 1405 ) . The two poles owe their origin to different quark flavor irreducible representations in the meson-baryon coupled-channel interactions, thus they should be individually manifested in reactions that provide good flavor eigenstate sources. Hadronic decays of charmonia into Λ ¯ Σ π and Λ ¯ ( 1520 ) Σ π are such reactions, and the flavor octet and singlet poles can be approximately singled out in these two decay modes. This SU(3) flavor filter works even considering the flavor symmetry breaking. With the huge charmonium data sets collected, it is therefore promising to solve the long-standing Λ ( 1405 ) puzzle employing the proposed flavor filter.
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Neutrino Physics Research
Particle physics theoretical and experimental studies
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 5
- Publication date
- 13 February 2026
- Language
- EN