1997/08/05 by F. Karsch, Karsch, F., A. Patkos +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9708244
Talk presented at Eotvos Conference in Science - 1997, Strong and Electroweak Matter '97, 21-25 May 1997, Eger, Hungary, 5 pages, LaTeX, 2 figures
arxiv created 1997/08/05 · arxiv updated 2009/11/30
A new perturbative scheme is proposed for the evaluation of the free energy density of field theories at finite temperature. The screened loop expansion takes into account exactly the phenomenon of screening in thermal propagators.The approach is tested in the N-component scalar field theory at 2-loop level and also at 3-loop in the large N limit. The perturbative series generated by the screened loop expansion shows much better numerical convergence than previous expansions generated in powers of the quartic coupling.