Master Formula Approach to Chiral Symmetry Breaking: Pi-Pi scattering

Abstract

The master formula approach to chiral symmetry breaking is used to analyze the phase shifts for $\pi \pi$ scattering in the elastic region. The results are in excellent agreement with the data for the phase shifts up to the K-K bar threshold. Our analysis shows that the pi-pi data near threshold in the scalar channel favors a large quark condensate in the vacuum, i.e. <q bar q> \sim -(240 MeV)^3.

Comments: 17 pages, LaTeX, 1 postscript file of 12 figures in addition. Equation 2 is changed, the rest is the same