Radiative Lifting of Flat Directions of the MSSM in de Sitter Background

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dc.creatorGarbrecht, Bjorn
dc.date2006-12-01
dc.date2006-12-03
dc.date.accessioned2026-07-07T10:37:30Z
dc.date.available2026-07-07T10:37:30Z
dc.descriptionThe one-loop effective potential for a charged scalar field in de Sitter background is studied. We derive an approximate form for the gauge boson propagator with a general covariant gauge-fixing parameter ξ. This expression is used to derive an explicitly gauge-invariant effective potential, which agrees with earlier results obtained in Landau gauge. Adding the scalar- and fermion-loop contributions, that arise in a supersymmetric Higgs model, we find that the effective potential is vanishing to first order in the Hubble rate H^2. The contribution due to a chiral multiplet running in the loop is however non-vanishing. When applied to a flat direction of the MSSM with VEV w, a logarithmically running correction of order $h^2 H^2 w^2$ arises, where h is Yukawa coupling. This is of particular importance for D-term inflation or models endowed with a Heisenberg symmetry, where Hubble scale mass terms for flat directions from supergravity corrections are absent.
dc.description14 pages
dc.identifierhttps://arxiv.org/abs/hep-ph/0612011
dc.identifierhttp://arxiv.org/abs/hep-ph/0612011
dc.identifierNucl.Phys.B784:118-131,2007
dc.identifierdoi:10.1016/j.nuclphysb.2007.06.013
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180400
dc.subjectHigh Energy Physics - Phenomenology
dc.titleRadiative Lifting of Flat Directions of the MSSM in de Sitter Background
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