Hadronic total cross sections, Wilson loop correlators and the QCD spectrum

2014/09/25 by Giordano, Matteo, Meggiolaro, Enrico
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1409.7376

Abstract

We show how to obtain rising hadronic total cross sections in QCD, in the framework of the nonperturbative approach to soft high-energy scattering based on Wilson-loop correlators. Total cross sections turn out to be of "Froissart"-type, i.e., the leading energy dependence is of the form σ_{\rm tot} ∼ B log² s, in agreement with experiments. The observed universality of the prefactor B is obtained rather naturally in this framework. In this case, B is entirely determined by the stable spectrum of QCD, and predicted to be B_th = 0.22 \rm mb, in fair agreement with experiments.

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