Screening Masses and Improvement in Pure SU(2) Lattice Gauge Theory at High Temperatures

Abstract

From the long-distance behaviour of gluon and Polyakov loop correlation functions we extract masses resp. energies in the electric and magnetic sectors. We discuss their dependence on the temperature and on the momentum as well as the relevance of an improvement of the lattice discretization of the action.Comment: Talk presented at LATTICE97 (Finite Temperature and Density) by J. Rank, 3 pages, LaTeX File, espcrc2.sty Style File and 2 eps figures include