Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/01/003
Keywords
dark matter theory; particle physics - cosmology connection
Funding
- Goran Gustafsson Foundation
- European Union through the FP7 Marie Curie Actions CIG NeuProbes [PCIG11-GA-2012-321582]
- European Union through the ITN INVISIBLES [PITN-GA-2011-289442]
- Spanish MINECO through the Ramon y Cajal programme [RYC2011-07710]
- Spanish MINECO [FPA2009-09017]
- Comunidad Autonoma de Madrid [HEPHACOS P-ESP-00346]
- Spanish MINECO's Centro de Excelencia Severo Ochoa Programme [SEV-2012-0249]
- [FPA2010-17747]
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The popular freeze-out paradigm for Dark Matter (DM) production, relies on DM-baryon couplings of the order of the weak interactions. However, different search strategies for DM have failed to provide a conclusive evidence of such (non-gravitational) interactions, while greatly reducing the parameter space of many representative models. This motivates the study of alternative mechanisms for DM genesis. In the freeze-in framework, the DM is slowly populated from the thermal bath while never reaching equilibrium. In this work, we analyse in detail the possibility of producing a frozen-in DM via a mediator particle which acts as a portal. We give analytical estimates of different freeze-in regimes and support them with full numerical analyses, taking into account the proper distribution functions of bath particles. Finally, we constrain the parameter space of generic models by requiring agreement with DM relic abundance observations.
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