High-temperature fermion propagator: Resummation and gauge dependence of the damping rate
- 15 June 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 45 (12) , R4381-R4384
- https://doi.org/10.1103/physrevd.45.r4381
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.Keywords
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