Gießen 2007 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Plenarvorträge

HK 56.2: Plenarvortrag

Freitag, 16. März 2007, 09:45–10:30, A

Aspects of confinement and dynamical quark mass generation in Landau gauge QCD — •Christian Fischer — Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt

We review recent results on the infrared properties of Landau gauge QCD from a nonperturbative functional integral approach. We discuss a unique analytic solution for the low momentum behaviour of dressed propagators and vertices. The resulting running coupling has a universal infrared fixed point. Gluon confinement is realised via positivity violations. In the quark sector we find a realisation of quark confinement due to infrared singularities in the quark-gluon vertex. We discuss numerical solutions for the quark propagator and resulting properties of light mesons.