Screening masses and improvement in pure SU(2) lattice gauge theory at high temperatures

Heller UM, Karsch F, Rank J. Screening masses and improvement in pure SU(2) lattice gauge theory at high temperatures. In: Nuclear Physics B - Proceedings Supplements. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. Vol 63. ELSEVIER SCIENCE BV; 1998: 421-423.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