How Universal is the Coupling in the Sigma Model?
arXiv:0804.3949 · doi:10.1063/1.2973492
Abstract
We calculate pion-pion scattering lengths and sigma, rho and a1 decay widths from a gauged linear sigma model with two flavours and its globally invariant generalisation.
Presented at the workshop SCADRON 70 "Scalar Mesons and Related Topics" February 11-16, 2008, at IST in Lisbon, Portugal. 5 pages, 1 figure