Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-10-05
POSLAT2007:286,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 7 figures; contribution to the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensbu
Scientific paper
Employing functional approaches the infrared behaviour of Landau gauge QCD vertex functions is investigated. Results for the ghost-gluon, three-gluon and quark-gluon vertex functions are presented. As can be analytically shown a linear rising potential between heavy quarks is generated by infrared singularities in the dressed quark-gluon vertex. The selfconsistent mechanism that generates these singularities implies the existence of scalar Dirac amplitudes of the full vertex and the quark propagator. These amplitudes can only be present when chiral symmetry is broken, either explicitly or dynamically. The corresponding relations thus constitute a novel mechanism that directly links chiral symmetry breaking with confinement.
Alkofer Reinhard
Fischer Christian S.
Llanes-Estrada Felipe J.
Schwenzer Kai
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