The pressure of QED from the two-loop 2PI effective action

Details The pressure of QED from the two-loop 2PI effective action The pressure of QED from the two-loop 2PI effective action

2007-09-14

arxiv.org/abs/0709.2316v1

Phys.Lett.B661:88-94,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 latex pages with 3 figures

Scientific paper

10.1016/j.physletb.2008.02.011

We compute the pressure of hot quantum electrodynamics from the two-loop truncation of the 2PI effective action. Since the 2PI resummation guarantees gauge-fixing independence only up to the order of the truncation, our result for the pressure presents a gauge dependent contribution of O(e^4). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for xi<1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.

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