Mechanism for dark matter depopulation
arXiv:1712.05170 · doi:10.1103/PhysRevD.98.095026
Abstract
Early decoupling of thermally produced dark matter particles due to feeble interactions with the surrounding plasma typically results in their excessive abundance. In this work we propose a simple mechanism for dark matter depopulation. It relies on a specific cosmological evolution under which dark matter particles become temporarily unstable and hence decay away reducing the overall abundance. The instability phase may be followed by an incomplete regeneration phase until the final abundance is established. We explicitly demonstrate this mechanism within a simple toy model of fermionic dark matter and discuss how it can be implemented in theoretically well motivated theories, such as the minimal supersymmetric standard model (MSSM) and for fermionic dark matter in the scotogenic model.
14 pages, 3 figures, Updated to match PRD
References in corpus (8)
- Results from a search for dark matter in the complete LUX exposure
- Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
- Cold Dark Matter, Radiative Neutrino Mass, mu to e gamma, and Neutrinoless Double Beta Decay
- Evolution of Universe to the present inert phase
- Probing the scotogenic model with lepton flavor violating processes
- Changes in Dark Matter Properties After Freeze-Out
- Light Dark Matter through Assisted Annihilation
- Different vacua in 2HDM
Cited by in corpus (5)
- Dark matter direct detection of a fermionic singlet at one loop
- Variations on the Vev Flip-Flop: Instantaneous Freeze-out and Decaying Dark Matter
- Dark matter transient annihilations in the early Universe
- Supersymmetric Naturalness Beyond MSSM
- Thermal dark matter abundance under non-standard macroscopic conditions in the early universe