Neutralino Dark Matter and the Curvaton

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dc.creatorLemoine, Martin
dc.creatorMartin, Jerome
dc.date2006-11-30
dc.date2007-03-09
dc.date.accessioned2026-07-07T11:20:47Z
dc.date.available2026-07-07T11:20:47Z
dc.descriptionWe build a realistic model of curvaton cosmology, in which the energy content is described by radiation, WIMP dark matter and a curvaton component. We calculate the curvature and isocurvature perturbations, allowing for arbitrary initial density perturbations in all fluids, following all species and their perturbations from the onset of dark matter freeze-out onto well after curvaton decay. We provide detailed numerical evaluations as well as analytical formulae which agree well with the latter. We find that substantial isocurvature perturbations, as measured relatively to the total curvature perturbation, can be produced even if the curvaton energy density is well underdominant when it decays; high precision measurements of cosmic microwave background anisotropies may thus open a window on underdominant decoupled species in the pre-nucleosynthesis early Universe. We also find that in a large part of parameter space, curvaton decay produces enough dark matter particles to restore WIMP annihilations, leading to the partial erasure of any pre-existing dark matter - radiation isocurvature perturbation.
dc.description21 pages, 11 figures. Version to appear in PRD (minor changes)
dc.identifierhttps://arxiv.org/abs/astro-ph/0611948
dc.identifierhttp://arxiv.org/abs/astro-ph/0611948
dc.identifierPhys.Rev.D75:063504,2007
dc.identifierdoi:10.1103/PhysRevD.75.063504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194070
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleNeutralino Dark Matter and the Curvaton
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