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Analytic Amplitude Models for Forward Scattering

K. Kang, J. R. Cudell, V. V. Ezhela, P. Gauron, Yu. V. Kuyanov, S. B. Lugovsky, B. Nicolescu, N. P. Tkachenko

hep-pharXiv:hep-ph/0111360

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 2 /dof. These indicators favor models with a universal log2 s Pomeron term, which enables one to extend the fit down to s = 4 GeV.

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