Gauge dependence of the fermion quasiparticle poles in hot gauge theories

Details Gauge dependence of the fermion quasiparticle poles in hot gauge theories Gauge dependence of the fermion quasiparticle poles in hot gauge theories

2004-05-31

arxiv.org/abs/hep-ph/0406002v2

Phys.Rev. D70 (2004) 065011

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, final version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.70.065011

The gauge dependence of the complex fermion quasiparticle poles corresponding to soft collective excitations is studied in hot gauge theories at one-loop order and next-to-leading order in the high-temperature expansion, with a view towards going beyond the leading order hard thermal loops and resummations thereof. We find that for collective excitations of momenta k ~ eT the dispersion relations are gauge independent, but the corresponding damping rates are gauge dependent. For k<

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