Pi Pi scattering in an effective chiral Lagrangian

Abstract

In this talk I summarize a recently proposed mechanism to understand pi pi scattering to 1 GeV. The model is motivated by the 1/Nc expansion to QCD, and includes a current algebra contact term and resonant pole exchanges. Chiral symmetry plays an important role in restricting the form of the interactions. The existence of a broad low energy scalar (sigma) is indicated.

10 pages (LaTeX), 4 PostScript figures are included as uuencoded-compressed-tar file at the end (need epsf.tex). Talk given at Montreal-Rochester-Syracuse-Toronto meeting (May 9--10, 1996)