Cosmic abundances of SIMP dark matter
Abstract
Thermal production of light dark matter with sub-GeV scale mass can be attributed to 3 → 2 self-annihilation processes. We consider the thermal average for annihilation cross sections of dark matter at 3 → 2 and general higher-order interactions. A correct thermal average for initial dark matter particles is important, in particular, for annihilation cross sections with overall velocity dependence and/or resonance poles. We apply our general results to benchmark models for SIMP dark matter and discuss the effects of the resonance pole in determining the relic density.
- Publication:
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Journal of High Energy Physics
- Pub Date:
- April 2017
- DOI:
- 10.1007/JHEP04(2017)154
- arXiv:
- arXiv:1702.07860
- Bibcode:
- 2017JHEP...04..154C
- Keywords:
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- Beyond Standard Model;
- Cosmology of Theories beyond the SM;
- High Energy Physics - Phenomenology;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 21 pages, 6 figures, Version to appear in Journal of High Energy Physics