On Quantum Fields at High Temperature

Abstract

Revisiting the fast fermion damping rate calculation in a thermalized momentum scale eT (QED) and/or momentum scale gT (QCD) plasma at 4-loop order, focus is put on a peculiar perturbative structure which has no equivalent at zero-temperature. Not surprisingly, and in agreement with previous C ★ -algebraic analyses, this structure renders the use of thermal perturbation theory quite questionable.

Keywords

• QED and QCD resummation programs
• hard thermal loops
• infrared/mass singularities
• C ★ -algebras