Dark Matter Assimilation into the Baryon Asymmetry
arXiv:1111.5615 · doi:10.1088/1475-7516/2012/03/010
Abstract
Pure singlets are typically disfavored as dark matter candidates, since they generically have a thermal relic abundance larger than the observed value. In this paper, we propose a new dark matter mechanism called "assimilation", which takes advantage of the baryon asymmetry of the universe to generate the correct relic abundance of singlet dark matter. Through assimilation, dark matter itself is efficiently destroyed, but dark matter number is stored in new quasi-stable heavy states which carry the baryon asymmetry. The subsequent annihilation and late-time decay of these heavy states yields (symmetric) dark matter as well as (asymmetric) standard model baryons. We study in detail the case of pure bino dark matter by augmenting the minimal supersymmetric standard model with vector-like chiral multiplets. In the parameter range where this mechanism is effective, the LHC can discover long-lived charged particles which were responsible for assimilating dark matter.
27 pages, 9 figures, 4 tables; v2, references added, switched to JCAP format; v3, references added, version published in JCAP
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Cited by in corpus (23)
- On Relating the Genesis of Cosmic Baryons and Dark Matter
- Testing the Origin of High-Energy Cosmic Rays
- Dark Nuclei I: Cosmology and Indirect Detection
- Realistic neutron star constraints on bosonic asymmetric dark matter
- Connecting Dark Matter UV Complete Models to Direct Detection Rates via Effective Field Theory
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- Closing in on Asymmetric Dark Matter I: Model independent limits for interactions with quarks
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- Fermi LAT study of cosmic-rays and the interstellar medium in nearby molecular clouds
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- Light Dark Matter from Leptogenesis
- On baryogenesis from dark matter annihilation
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- Hot Leptogenesis from Thermal Dark Matter
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- Generation of WIMP Miracle-like Densities of Baryons and Dark Matter