Electroproduction from Nucleons in a Relativistic Quark Model

Abstract

A relativistic formulation of the quark model recently proposed by Feynman, Kislinger, and Ravndal is applied to electroproduction of nucleonic resonances. Formulas for the ratio of longitudinal to transverse photoabsorption cross sections that are relevant to both the resonance and deep-inelastic regions are derived. This formulation is found to be much more successful than the nonrelativistic symmetric quark model and is consistent with the existing data.