Bounds on Dark Matter annihilations from 21 cm data
Cosmology and Nongalactic Astrophysics
2018-07-11 v2 High Energy Physics - Phenomenology
Abstract
The observation of an absorption feature in the 21 cm spectrum at redshift implies bounds on Dark Matter annihilations for a broad range of masses, given that significant heating of the intergalactic medium would have erased such feature. The resulting bounds on the DM annihilation cross sections are comparable to the strongest ones from all other observables.
Keywords
Cite
@article{arxiv.1803.03629,
title = {Bounds on Dark Matter annihilations from 21 cm data},
author = {Guido D'Amico and Paolo Panci and Alessandro Strumia},
journal= {arXiv preprint arXiv:1803.03629},
year = {2018}
}
Comments
8 pages. v2: improved treatment of energy deposition