Perturbation Theory of Pion-Pion Interaction .2. -Pion Approximation
Journal
Physical Review
Journal Volume
126
Journal Issue
6
Pages
2219-&
Date Issued
1962
Author(s)
Wu, Tt
Abstract
On the basis of the model of a four-particle direct interaction without derivative coupling, relations are obtained between the various renormalized quantities related to pion-pion interaction. By considering only two-pion intermediate states but preserving crossing symmetry and unitarity up to the production threshold, closed systems of nonlinear integral equations are obtained from these relations to describe approximately the low-energy pion-pion scattering.
SDGs
Type
journal article