Unitarized Chiral Perturbation Theory and the meson spectrum

TL;DR

This paper reviews how unitarized Chiral Perturbation Theory, combined with dispersion relations, effectively models meson-meson scattering, generates light resonances, and relates their properties to fundamental QCD parameters.

Contribution

It demonstrates a successful approach to describing meson spectra and resonances using unitarized Chiral Perturbation Theory with dispersion relations, linking phenomenology to QCD.

Findings

Accurately describes meson-meson scattering data

Generates light resonances consistent with experimental observations

Relates resonance properties to QCD parameters

Abstract

In this talk we briefly review how the unitarization of Chiral Perturbation Theory with dispersion relations can successfully describe the meson-meson scattering data and generate light resonances, whose mass, width and nature can be related to QCD parameters like quark masses and the number of colors.