%0 Journal Article
%T Pion Scattering Revisited
%A M. Ruiz-Altaba
%A J. L. Lucio
%A M. Napsuciale
%J Physics
%D 1999
%I arXiv
%R 10.1063/1.1301413
%X Chiral Ward identities lead to consistent accounting for the sigma's width in the linear sigma model's Feynman rules. Reanalysis of pion scattering data at threshold imply a mass for the sigma of 600+ 200 - 100 MeV.
%U http://arxiv.org/abs/hep-ph/9904224v1