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Revisiting CMB constraints on dark matter annihilation

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arxiv 2105.08334 v2 pith:TU4ECEQ5 submitted 2021-05-18 astro-ph.CO hep-ph

Masahiro Kawasaki , Hiromasa Nakatsuka , Kazunori Nakayama , Toyokazu Sekiguchi This is my paper
classification astro-ph.COhep-ph
keywords annihilationdarkmattercodeconstraintcrosshistoryionization
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 1 Pith paper

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  1. Topological Freeze-out by Semi-Annihilation

    hep-ph 2025-06 conditional novelty 6.0 of 10

    A dark QCD sector with gauged baryon number yields a p-wave semi-annihilation channel that can set the dark matter relic abundance for pion masses between 10 MeV and 1 TeV.

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