Comparison to Experiment of the Amatic-Leader-Vitale Multipion-Exchange Contributions

Abstract

The phase shifts obtained by Amati, Leader, and Vitale (ALV), using the Cini-Fubini approach to the Mandelstam representation, are compared to proton-proton scattering data at 51.8, 96.5, 142, 210, and 310 MeV. The ALV phases yield a considerably better fit to the data than do pure one-pion exchange, but considerably poorer than modified phase analyses. The unusual behavior of the ALV ${}_{}{}^3{}_{}{}^{}F_2^{}{}_{}{}^{}$ and ${\epsilon }_4$ is not confirmed. The lower angular momentum phases from ALV+data are generally not greatly different from those of modified phase analyses.