Cosmological Probes of Dark Matter
ORAL · Invited
Abstract
84% of the matter in the universe is "dark", presently invisible to us except through its gravitational interactions. However, even tiny interactions between dark and visible matter could have striking effects on the primordial history of our universe, and leave distinctive traces of their existence -- for example, in the low-energy background photons that pervade the cosmos. I will first outline the space of possibilities for dark matter, and the power of cosmological probes to constrain that space. I will then discuss recent work mapping out the range of dark-matter-induced signals that could be imprinted in observations of the redshifted 21cm line of neutral hydrogen, and in distortions to the cosmic microwave background radiation.
*This work was supported by the Simons Foundation (Grant Number 929255, T.R.S) and by the U.S. Department of Energy, Office of Science, Office of High Energy Physics of U.S. Department of Energy under grant contract Number DE-SC001256.
–
Publication: Liu et al PRD108 (2023) 4, 043531
Liu et al PRD 108 (2023) 4, 043530
Sun et al, Phys.Rev.D 111 (2025) 4, 043015
Agius & Slatyer, arXiv:2510.26791
Presenters
-
Tracy R Slatyer
- Massachusetts Institute of Technology