Hadronic scattering amplitudes: medium-energy constraints on asymptotic behaviour
High Energy Physics - Phenomenology
2009-11-07 v2
Abstract
We consider several classes of analytic parametrisations of hadronic scattering amplitudes, and compare their predictions to all available forward data (p p, pbar p, pi p, K p, gamma p, gamma gamma, Sigma p). Although these parametrisations are very close for sqrt(s) > 9 GeV, it turns out that they differ markedly at low energy, where a universal pomeron term ~log^2(s) enables one to extend the fit down to sqrt(s)=4 GeV.
Cite
@article{arxiv.hep-ph/0107219,
title = {Hadronic scattering amplitudes: medium-energy constraints on asymptotic behaviour},
author = {J. R. Cudell and V. Ezhela and P. Gauron and K. Kang and Yu. V. Kuyanov and S. Lugovsky and B. Nicolescu and N. Tkachenko},
journal= {arXiv preprint arXiv:hep-ph/0107219},
year = {2009}
}
Comments
33 pages. Notations revised, clarified and corrected, appendix added with the formulae used, one reference added, typos corrected