Lectures on the theory of Strong Interactions [MatSciRep:23]

Abstract

This Report is based on the Lectures given by the then visiting Professor Dr. M. Jacob, from Service de Physique Theorique, CEN de Saclay, Seine et Oise, France. And these lecture notes are prepared by K. Raman. The different possible ways of using Dispersion Relations in the description of the strong interactions of elementary particles are mainly discussed in these lectures. These lectures are complementary to Prof. Roman's Lectures, where given an exhaustive discussion of dispersion relations for potential scattering. In a theory using Dispersion relations, it is examined that restrictions can be obtained on the amplitude for a scattering or reaction process, when the prescribed requirements of analyticity, unitarity, and crossing symmetry are imposed. The main advantage of the technique of the dispersion relations is that experimental information can be easily incorporated into the theory, and that the relations can be derived between the amplitudes for different processes, which can be checked with experiments, like relating pion-pion interaction and nucleon form factors.