Revisiting CMB constraints on dark matter annihilation
Cosmology and Nongalactic Astrophysics
2021-12-15 v2 High Energy Physics - Phenomenology
Abstract
The precision measurements of the cosmic microwave background power spectrum put a strong constraint on the dark matter annihilation cross section since the electromagnetic energy injection by the dark matter annihilation affects the ionization history of the universe. In this paper, we update our previous simulation code for calculating the ionization history with the effect of dark matter annihilation by including Helium interactions and improving the precision of calculations. We give an updated constraint on the annihilation cross section and mass of dark matter using the modified RECFAST code with the Planck 2018 datasets.
Cite
@article{arxiv.2105.08334,
title = {Revisiting CMB constraints on dark matter annihilation},
author = {Masahiro Kawasaki and Hiromasa Nakatsuka and Kazunori Nakayama and Toyokazu Sekiguchi},
journal= {arXiv preprint arXiv:2105.08334},
year = {2021}
}
Comments
25pages, 9 figures