Chiral dynamics and baryon resonances
Tetsuo Hyodo (Tokyo Inst. Tech.)
TL;DR
This paper reviews how chiral dynamics and unitarity principles help understand baryon resonances, especially the Lambda(1405), through meson-baryon scattering analysis.
Contribution
It presents recent advances in analyzing baryon resonance structures using chiral dynamics and coupled-channel scattering methods.
Findings
Successful description of meson-baryon scattering amplitudes
Insights into the structure of the Lambda(1405) resonance
Application of unitarity and chiral constraints in resonance analysis
Abstract
The structure of baryon resonance in coupled-channel meson-baryon scattering is studied from the viewpoint of chiral dynamics. The meson-baryon scattering amplitude can be successfully described together with the properties of the resonance in the scattering, by implementing the unitarity condition for the amplitude whose low energy structure is constrained by chiral theorem. Recently, there have been a major progress in the study of the structure of the resonance in chiral dynamics. We review the methods to clarify the structure of the resonance by focusing on the Lambda(1405) resonance.
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