Model for Scattering at all Angles

Abstract
We present a simple absorptive optical model for all scattering angles. For simplicity, we discuss the case of pion-nucleon charge-exchange scattering and show how the model contains in a unified way the dip structures in both forward and backward directions. For comparison with experiment, we present a fit to elastic π+p scattering at 3 GeVc where data are available at all angles.