Decay widths of resonances and pion scattering lengths in a globally invariant linear sigma model with vector mesons

Abstract

We calculate low-energy meson decay processes and pion-pion scattering lengths in a two-flavour linear sigma model with global chiral symmetry, exploring the scenario in which the scalar mesons $f_0$(600) and $a_0$(980) are assumed to be $\bar{q}q$ states.

Comments: Talk at the 8th Conference on Quark Confinement and the Hadron Spectrum, Mainz (Germany), 1-6 September 2008; 6 pages