Yang-Mills theory at non-vanishing temperature

Abstract

We compute ghost and gluon propagators of Yang-Mills theory in the Landau gauge at non-vanishing temperature within a functional renormalisation group setting. We construct purely thermal flows, that project onto thermal fluctuations only. For temperatures and momenta above the confinement-deconfinement temperature Tc the electric propagator shows a thermal suppression due to Debye screening. The magnetic gluon propagator shows a thermal scaling and tends towards the three-dimensional one. In this region both propagators match the lattice propagators. The thermal scaling is also reflected in the infrared suppression of the ghost-gluon vertex. For temperatures below Tc the electric propagator shows an enhancement which is in qualitative agreement with the lattice behaviour.

Talk given by LF at the International Workshop on QCD Green's Functions, Confinement and Phenomenology (QCD-TNT-II), 5-9 September 2011, Trento, Italy; 12 pages, 9 figures