出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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.
