Abstract
We study dark matter (DM) for gaugino-mediated supersymmetry breaking and compactdimensions of order of the grand unification scale. Higgs fields are bulk fields and ingeneral their masses differ from those of squarks and sleptons at the unificationscale. As a consequence, at different points in parameter space, the gravitino, aneutralino or a scalar lepton can be the lightest (LSP) or next-to-lightest (NLSP)superparticle. We investigate the constraints from primordial nucleosynthesis on thedifferent scenarios. While neutralino DM and gravitino DM with a NLSP are consistent for a wide range of parameters, gravitino DM with a NLSP is strongly constrained. Gravitino DM with aχ0 NLSP is excluded.
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