2002/11/30 by Mar Bastero-Gil, M. Bastero-Gil, V. Di Clemente +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.67.083504
published as Phys.Rev. D67 (2003) 083504 · Version to appear in PRD. Latex, 1+17 pages, style file included
arxiv created 2003/04/02 · openalex publication_date 2003/04/21 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We embed the supersymmetric standard model of hybrid inflation based on the next-to-minimal superpotential term \ensuremathλNHuHd supplemented by an inflaton term \ensuremathκ\ensuremathφN2 into an extra-dimensional framework, in which all the Higgs fields and singlets live in the bulk, while all the matter fields live on the brane. All the parameters of the effective 4D model can then be naturally understood in terms of a fundamental (``string'') scale M*\ensuremath∼1013GeV and a brane supersymmetry breaking scale 108GeV, of the same order as the height of the inflaton potential during inflation. In particular, the very small Yukawa couplings \ensuremathλ\ensuremath∼\ensuremathκ\ensuremath∼10^\ensuremath-10, necessary for the model to solve the strong CP problem and to generate the correct effective \ensuremathμ term after inflation, can be naturally understood in terms of volume suppression factors. The brane scalar masses are naturally of order a TeV while the bulk inflaton mass is naturally in the MeV range sufficient to satisfy the slow roll constraints. Curvature perturbations are generated after inflation from the isocurvature perturbations of the supersymmetric Higgs field as discussed in a companion paper.