Neutral and charged pion production in the S-matrix approach

Abstract

The S-matrix approach is applied to charged and neutral pion production in pp collisions, in which the spin/isospin channels filter differently the rescattering mechanism. The chiral perturbation theory rescattering amplitude is employed. The contributions from the single-nucleon, Z-diagrams and Delta-isobar mechanisms are also included. For the reactions investigated, the convergence of the partial wave series is quite satisfactory and J=0 is enough to describe the data close to threshold.

To appear in the proceedings of the 6th International Conference on Nuclear Physics at Storage Rings (STORI'05), Julich - Bonn, Germany, 23-26 May 2005