Analysis ofπ+pElastic Scattering from 2.74 to 4.0 GeV/cat All Angles

Abstract

We analyze ${\pi }^{+}p$ elastic scattering in terms of $s$-channel helicity amplitudes. We demonstrate that the data are consistent at all angles with the picture of scattering from an interaction region of radius 0.8 F, with special edge effects accounting for backward scattering.