Gauge dependence ambiguity and chemical potential in thermal U(1) theory

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dc.creatorLoewe, M.
dc.creatorMendizabal, S.
dc.creatorSantos, R. A.
dc.date2006-08-29
dc.date2007-03-05
dc.date.accessioned2026-07-07T11:05:37Z
dc.date.available2026-07-07T11:05:37Z
dc.descriptionIn this letter we explore the dependence on the gauge fixing condition of several quantities in the U(1) Higgs model at finite temperature and chemical potential. We compute the effective potential at the one loop level, using a gauge fixing condition that depends on $μ$ and which allows to decouple the contributions of the different fields in the model. In this way we get the mass spectrum and the characterization of the phase transition, pointing out in each case how these quantities depend on the gauge fixing parameter $ξ$. When $μ$ vanishes, we agree with previous results if $ξ=0$. The gauge dependence problem is also analyzed from the perspective of the Nielsen identities.
dc.descriptionfourteen pages, we add an analysis of the problem from the perspective of Nielsen identities, to be published in Modern Letters Physics A
dc.identifierhttps://arxiv.org/abs/hep-ph/0608311
dc.identifierhttp://arxiv.org/abs/hep-ph/0608311
dc.identifierMod.Phys.Lett.A22:2763-2773,2007
dc.identifierdoi:10.1142/S0217732307023377
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189259
dc.subjectHigh Energy Physics - Phenomenology
dc.titleGauge dependence ambiguity and chemical potential in thermal U(1) theory
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