Abstract
We study the quark propagator at finite temperature on euclidean lattices in the Landau gauge, and compare the results to an O( g 2) lattice weak coupling calculation. The screening mass obtained from spatial correlation functions in the chiral symmetric phase is close to the Matsubara frequency. The temporal correlation functions yield a much smaller screening mass, which approaches the perturbative result, m eff 2= g 2 T 2/6, for T≳1.75 T c. Deviations from the perturbative behaviour are seen for T c⩽ T⩽1.75 T c. For T⩽ T c, the screening masses from both spatial and temporal correlation functions are large and close to half the mass of the ϱ-meson. Dispersion relations do not show any significant deviations from free particle behaviour.
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