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Analytic parametrizations of the non-perturbative Pomeron and QCD-inspired models

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

We consider several classes of analytic parametrizations of hadronic scattering amplitudes, and compare their predictions to all available forward data (proton- proton, antiproton-proton, pion-proton, kaon-proton, photon-proton, photon- photon, sigma-proton). Although these parametrizations are very close for energy larger than 9 GeV, it turns out that they differ markedly at low energy, where a universal Pomeron term ~(ln s)**2 enables one to extend the fit down to 4 GeV.

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B. Nicolescu, J. R. Cudell, V. V. Ezhela, P. Gauron, K. Kang, Yu. V. Kuyanov, S. B. Lugovsky, N. P. Tkachenko. 2001-11-27. Analytic parametrizations of the non-perturbative Pomeron and QCD-inspired models. https://arxiv.org/abs/hep-ph/0110170

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