Property of \sigma(600) and Chiral Symmetry
  The iso-singlet scalar resonance \sigma(600), found in the recent \pi\pi phase shift analysis, is pointed out to have the properties of the \sigma meson in the \sigma model. The role of the \lambda\phi^4 interaction as a source of the ``background phase", which was essential there, is also discussed. 
M. Y. Ishida