Testing models of interaction between dark energy and dark matter
Black holes in an expanding universe and interaction betweend dark matter and dark...
Dark matter in galaxies: from Astrophysics to Fundamental Physics
| Full text | |
| Author(s): |
Bernal, Nicolas
;
Chu, Xiaoyong
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Journal of Cosmology and Astroparticle Physics; v. N/A, n. 1, p. 19-pg., 2016-01-01. |
| Abstract | |
Dark matter with strong self-interactions provides a compelling solution to several small-scale structure puzzles. Under the assumption that the coupling between dark matter and the Standard Model particles is suppressed, such strongly interacting massive particles (SIMPs) allow for a successful thermal freeze-out through N-to-N' processes, where N dark matter particles annihilate to N' of them. In the most common scenarios, where dark matter stability is guaranteed by a Z(2) symmetry, the seemingly leading annihilating channel, i.e. 3-to- 2 process, is forbidden, so the 4-to-2 one dominate the production of the dark matter relic density. Moreover, cosmological observations require that the dark matter sector is colder than the thermal bath of Standard Model particles, a condition that can be dynamically generated via a small portal between dark matter and Standard Model particles, a la freeze-in. This scenario is exempli fied in the context of the Singlet Scalar dark matter model. (AU) | |
| FAPESP's process: | 11/11973-4 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Research Projects - Thematic Grants |