Unitarized Chiral Perturbation Theory and the meson spectrum

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.

Comments: Invited plenary talk to HADRON09, the XIII International Conference on Hadron Spectroscopy Nov.29-Dec.4, 2009, Florida State University