Non-perturbative momentum dependence of the coupling constant and hadronic models
High Energy Physics - Phenomenology
2011-04-05 v2
Abstract
Models of hadron structure are associated with a hadronic scale which allows by perturbative evolution to calculate observables in the deep inelastic region. The resolution of Dyson-Schwinger equations leads to the freezing of the QCD running coupling (effective charge) in the infrared, which is best understood as a dynamical generation of a gluon mass function, giving rise to a momentum dependence which is free from infrared divergences. We use this new development to understand why perturbative treatments are working reasonably well despite the smallness of the hadronic scale.
Keywords
Cite
@article{arxiv.1102.1599,
title = {Non-perturbative momentum dependence of the coupling constant and hadronic models},
author = {A. Courtoy and S. Scopetta and V. Vento},
journal= {arXiv preprint arXiv:1102.1599},
year = {2011}
}
Comments
Changes in Acknowledgments and PACS numbers