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

Journal Article · Mon Jun 15 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.R4381· OSTI ID:7035837

Baier, R ^[1]; Kunstatter, G ^[2]; Schiff, D ^[3]

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1. Fakultaet fuer Physik, Universitaet Bielefeld, D-4800 Bielefeld 1 (Germany)
2. Department of Physics and Winnipeg Institute for Theoretical Physics, University of Winnipeg, Winnipeg, Manitoba, R3B 2E9 (Canada)
3. Laboratoire de Physique Theorique et Hautes Energies, Universite Paris-Sud, Batiment 211, F-91405 Orsay (France)

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.

• OSTI ID: 7035837
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:12; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662220 -- Quantum Electrodynamics-- (1992-)
662230 -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRODYNAMICS
ENERGY
FERMIONS
FIELD THEORIES
PERTURBATION THEORY
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
SELF-ENERGY
TEMPERATURE DEPENDENCE