Nonperturbative quark-gluon dynamics

Details Nonperturbative quark-gluon dynamics Nonperturbative quark-gluon dynamics

2007-10-10

arxiv.org/abs/0710.1915v1

ECONFC070910:223,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages; Talk given by CF at the 11th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU

Scientific paper

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.

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