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Isocurvature Perturbations and Non-Gaussianity of Gravitationally Produced Nonthermal Dark Matter

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arxiv 1110.5931 v2 pith:CQFXO23S submitted 2011-10-26 astro-ph.CO gr-qchep-phhep-th

classification astro-ph.COgr-qchep-phhep-th
keywords darkmatternonthermalparticlesisocurvaturelocalnon-gaussianitiesphase
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Gravitational particle production naturally occurs during the transition from the inflationary phase to the non-inflationary phase. If the particles are stable and very weakly interacting, they are natural nonthermal dark matter candidates. We show that such nonthermal dark matter particles can produce local non-Gaussianities large enough to be observed by ongoing and near future experiments without being in conflict with the existing isocurvature bounds. Of particular interest is the fact that these particles can be observable through local non-Gaussianities even when they form a very small fraction of the total dark matter content.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The effects of non Bunch-Davies initial conditions on gravitationally produced relics

    gr-qc 2026-03 conditional novelty 6.0 of 10

    Non-Bunch–Davies initial conditions can drastically change gravitationally produced vector dark matter abundances, opening a wider viable mass range.

  2. Free streaming of warm wave dark matter in modified expansion histories

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    Warm wave dark matter free streaming can shift by up to roughly 40% in a very early dark energy cosmology, while early matter domination moves the signal to unobservably small scales.

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