1996/06/10 by Jacques Bros, Detlev Buchholz · 1 citation
Physics and Astronomy · #hep-th #hep-ph
published as Annales Poincare Phys.Theor. 64 (1996) 495-522 · 23 pages, TEX, no figures, to appear in Ann. Inst. H. Poincare
arxiv created 1996/06/10 · arxiv updated 2009/11/30
We provide an axiomatic framework for Quantum Field Theory at finite temperature which implies the existence of general analyticity properties of the n -point functions; the latter parallel the properties derived from the usual Wightman axioms in the vacuum representation of Quantum Field Theory. Complete results are given for the propagators, including a generalization of the Källén-Lehmann representation. Some known examples of ``hard-thermal-loop calculations'' and the representation of ``quasiparticles'' are discussed in this general framework.