Analytic Amplitude Models for Forward Scattering

Abstract

We report on fits of a large class of analytic amplitude models for forward scattering against the comprehensive data for all available reactions. To differentiate the goodness of the fits of many possible parametrizations to a large sample of data, we developed and used a set of quantitative indicators measuring statistical quality of the fits over and beyond the typical criterion of the ${\mathrm{X}}^2/dof$. These indicators favor models with a universal $lo{g}^{2}s$ Pomeron term, which enables one to extend the fit down to $\sqrt{s}=4$ GeV.

Comments: 13 pages, COMPETE Collaboration, talk presented at the 9th International Conference (Blois Workshop) on Elastic and Diffractive Scattering