Large-angle antiproton-proton elastic scattering between 1.50 and 2.06 GeV/c

Differential cross-sections for antiproton-proton elastic scattering are presented at eight laboratory momenta from 1.50 to 2.06 GeV/c. The data are analysed using an S-parameter optical model a la Frahn and Venter. However, the best representation of the differential cross-sections is obtained by combining the glory model with a parametrization of the scattering amplitude in terms of coherent exponentials. Both representations show the dominance of the partial wave with orbital angular momentum equal to four