High temperature fermion propagator: Resummation and gauge dependence of the damping rate
Dec, 199115 pages
Published in:
- Phys.Rev.D 45 (1992) R4381-R4384
Report number:
- BI-TP-91-38
Citations per year
Abstract: (APS)
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.- fermion: propagator
- temperature: high
- quantum electrodynamics
- quantum chromodynamics
- dependence: gauge
- perturbation theory
- Ward identity
- plasma: damping
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