Spin-3/2 Nucleon Resonances in Kaon Photoproduction

Abstract

We have investigated two different formulations of propagators and vertex factors of spin-3/2 nucleon resonances by means of the isobar model for kaon photoproduction γp → K + Λ. The results obtained from both formulations are fitted to experimental data by allowing the coupling constants to vary as free parameters. It is found that the gauge invariant formulation of the interaction vertex leads to a better agreement with the experimental data.