SU(3) Chiral approach to meson and baryon dynamics

TL;DR

This paper discusses an advanced chiral unitary approach that extends the applicability of chiral perturbation theory to higher energies, successfully describing meson and baryon interactions up to 1.2 GeV and exploring new physical processes.

Contribution

It demonstrates the larger convergence radius of the chiral unitary approach compared to standard chiral perturbation theory, enabling new insights into meson-baryon dynamics and reactions.

Findings

Reproduces meson-meson interaction data up to 1.2 GeV

Models meson-baryon interactions near baryonic resonances

Analyzes reactions like K^- p→Λ(1405)γ and N*(1535) couplings

Abstract

We report on recent progress on the chiral unitary approach, which is shown to have a much larger convergence radius than ordinary chiral perturbation theory, allowing one to reproduce data for meson meson interaction up to 1.2 GeV and meson baryon interaction up to the first baryonic resonances. Applications to physical processes so far unsuited for a standard chiral perturbative approach are presented, concretely the K^- p\to\Lambda(1405)\gamma reaction and the N^\ast (1535)N^\ast(1535)\pi and \eta couplings.