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
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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