The soft fermion dispersion relation at next-to-leading order in hot QED

Abstract

We study next-to-leading order contributions to the soft static fermion dispersion relation in hot QED. We derive an expression for the complete next-to-leading order contribution to the retarded fermion self-energy. The real and imaginary parts of this expression give the next-to-leading order contributions to the mass and damping rate of the fermionic quasi-particle. Many of the terms that are expected to contribute according to the traditional power counting argument are actually subleading. We explain why the power counting method over estimates the contribution from these terms. For the electron damping rate in QED we obtain: ${\gamma }_{QED}=\frac{e^{2}T}{4\pi }(2.70)$. We check our method by calculating the next-to-leading order contribution to the damping rate for the case of QCD with two flavours and three coulours. Our result agrees with the result obtained previously in the literature. The numerical evaluation of the nlo contribution to the mass is left to a future publication.

arXiv comment15 pages, 5 figures

References in corpus (4)

• The Nonabelian Debye Mass at Next-to-Leading Order
• Lifetime of quasiparticles in hot QED plasmas
• Comment on ``High Temperature Fermion Propagator -- Resummation and Gauge Dependence of the Damping Rate''
• Gauge Independence of Limiting Cases of One-Loop Electron Dispersion Relation in High-Temperature QED

Cited by in corpus (8)

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• Next-to-leading order static gluon self-energy for anisotropic plasmas
• Thermal field theory at next-to-leading order in the hard thermal loop expansion
• Non-Fermi liquid behavior of the drag and diffusion coefficients in QED plasma
• Systematics of High Temperature Perturbation Theory: The Two-Loop Electron Self-Energy in QED
• NLO quark self-energy and dispersion relation using the hard thermal loop resummation
• NLO Dispersion Laws for Slow-Moving Quarks in HTL QCD