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Enhancement of dark matter relic density from the late time dark matter conversions

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arxiv 1101.4148 v3 pith:7XZBYBZU submitted 2011-01-21 hep-ph

Ze-Peng Liu , Yue-Liang Wu , Yu-Feng Zhou This is my paper · ORCID
classification hep-ph
keywords darkmattercomponentsconversionsdensityenhancementlaterelic
verification ladder T0 review T1 audit T2 compute T3 formal
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We demonstrate that if the dark matter (DM) in the Universe contains multiple components,the interactions between the DM components may induce DM conversions. It is then possible that the lightest DM component with an annihilation cross section much larger than that of the typical weakly interacting massive particle (WIMP) can obtain a relic density in consistent with the cosmological observations, due to an enhancement from the DM conversion process at late time after the thermal decoupling. This provides an alternative source of large boost factor required to explain the excesses reported by the recent DM indirect search experiments.

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Cited by 3 Pith papers

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

  1. Probing the Phenomenology of Dark Matter from Decoupled Freeze-Out

    hep-ph 2025-11 conditional novelty 6.0 of 10

    In a scalar-plus-pseudoscalar mediator model, decoupled freeze-out can produce the observed dark matter relic density via s-wave annihilation while evading CMB limits, though indirect-detection and BBN bounds leave on...

  2. Unveiling the inert Triplet desert region with a pNGB Dark Matter and its Gravitational Wave signatures

    hep-ph 2025-05 conditional novelty 6.0 of 10

    A two-component dark matter model combining an inert scalar triplet with a pseudo-Goldstone singlet revives the sub-TeV triplet desert region and predicts gravitational waves detectable by LISA, BBO, and DECIGO.

  3. FIMPs in a two-component dark matter model with $Z_2 \times Z_4$ symmetry

    hep-ph 2026-02 conditional novelty 5.0 of 10

    In this two-component dark matter model, freeze-in works with masses up to 3 TeV only if the scalar portal coupling is as small as 10^-25, far below usual FIMP values.

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