Hadronic scattering amplitudes: medium-energy constraints on asymptotic behaviour

Details Hadronic scattering amplitudes: medium-energy constraints on asymptotic behaviour Hadronic scattering amplitudes: medium-energy constraints on asymptotic behaviour

2001-07-20

arxiv.org/abs/hep-ph/0107219v2

Phys.Rev. D65 (2002) 074024

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages. Notations revised, clarified and corrected, appendix added with the formulae used, one reference added, typos correc

Scientific paper

10.1103/PhysRevD.65.074024

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.

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