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 ${\ensuremath{\pi}}^{+}p$ scattering at $3 \frac{\mathrm{GeV}}{c}$ where data are available at all angles.