Covariant perturbation expansion in chiral theories with pions and nucleons: M. Daniel, II. Institut für Theoretische Physik der Universität Hamburg; and R. R. Horgan, Deutsches Elektronen-Synchrotron, DESY, Hamburg

Abstract

A comprehensive study of pp and np Bremsstrahlung based upon the potential model formalism was initiated to explore properties of two nucleon t-matrices. Underlying potentials of t-matrices either were generated by Gelfand-Levitan-Marchenko inversion of the latest NN phase shifts or are the Paris and Bonn-R potentials. The Bremsstrahlung amplitudes associated with external, internal and exchange currents, by exact treatment of the Coulomb potential in on- and half-off-shell t-matrices, and the relativistic spin corrections were all computed and for both coplanar and non coplanar geometries. The results are a successful analysis of ppγ TRIUMF data and allow us to set experimental boundaries for planned new experiments. They also give a perspective of the off-shell t-matrix information inherent in this reaction.