Nonperturbative quark-gluon dynamics
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
We summarize recent results on the nonperturbative quark-gluon interaction in Landau gauge QCD. Our analytical analysis of the infrared behaviour of the quark-gluon vertex reveals infrared singularities, which lead to an infrared divergent running coupling and a linear rising quark-antiquark potential when chiral symmetry is broken. In the chirally symmetric case we find an infrared fixed point of the coupling and, correspondingly, a Coulomb potential. These findings provide a new link betwen dynamical chiral symmetry breaking and confinement.
Cite
@article{arxiv.0710.1915,
title = {Nonperturbative quark-gluon dynamics},
author = {Christian S. Fischer and Reinhard Alkofer and Felipe J. Llanes-Estrada and Kai Schwenzer},
journal= {arXiv preprint arXiv:0710.1915},
year = {2008}
}
Comments
4 pages; Talk given by CF at the 11th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU07), September 10-14, 2007, Forschungzentrum Juelich, Germany