The Free Energy of Hot QED at Fifth Order

Abstract

The order $e^5$ contribution to the pressure of massless quantum electrodynamics at nonzero temperature is determined explicitly. An identity is also obtained relating a gauge-invariant piece of the pressure at order $e^{2n+3}(n\ge 1)$ (from diagrams with only one fermion loop) to the pressure at order $e^{2n}$.

Comments: 1+9+1 pages (figures attached as .ps file after end{document}); preprint SPhT/94-065