On the gauge dependence of vacuum transitions at finite temperature

Abstract

In principle, observables as for example the sphaleron rate or the tunneling rate in a first-order phase transition are gauge-independent. However, in practice a gauge dependence is introduced in explicit perturbative calculations due to the breakdown of the gradient expansion of the effective action in the symmetric phase. We exemplify the situation using the effective potential of the Abelian Higgs model in the general renormalizable gauge. Still, we find that the quantitative dependence on the gauge choice is small for gauges that are consistent with the perturbative expansion.

49 pages, 14 figures; matches published version

References in corpus (1)

• Gravity Waves from a Cosmological Phase Transition: Gauge Artifacts and Daisy Resummations

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