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High-temperature fermion propagator: Resummation and gauge dependence of the damping rate

R. Baier, G. Kunstatter, and D. Schiff
Phys. Rev. D 45, R4381(R) – Published 15 June 1992
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Abstract

The gauge-fixing dependence of the damping rate of the QED and QCD fermionic excitations at high temperatures and long wavelengths is reexamined in detail using the effective leading-order perturbation expansion developed by Braaten and Pisarski. In contrast with what is expected from recent formal discussions, explicit calculations in covariant gauges yield a fermionic damping rate that is gauge parameter dependent. This result has general implications for gauge theories at nonzero temperature.

  • Received 19 December 1991

DOI:https://doi.org/10.1103/PhysRevD.45.R4381

©1992 American Physical Society

Authors & Affiliations

R. Baier

  • Fakultät für Physik, Universität Bielefeld, D-4800 Bielefeld 1, Federal Republic of Germany

G. Kunstatter

  • Physics Department and Winnipeg Institute for Theoretical Physics, University of Winnipeg, Winnipeg, Manitoba, Canada R3B 2E9

D. Schiff

  • Laboratoire de Physique Théorique et Hautes Énergies, Université Paris-Sud, Bâtiment 211, F-91405 Orsay, France

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Vol. 45, Iss. 12 — 15 June 1992

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