Effects of Dark Matter Annihilation on the Cosmic Microwave Background
Toru Kanzaki, Masahiro Kawasaki, Kazunori Nakayama
TL;DR
This paper investigates how dark matter annihilation impacts the cosmic microwave background, providing constraints on dark matter properties based on observational data.
Contribution
It offers a detailed analysis of energy deposition from dark matter annihilation and derives new constraints on annihilation cross sections from WMAP data.
Findings
Stringent constraints on dark matter annihilation cross section for TeV masses.
Impact of annihilation on CMB anisotropy is significant during recombination.
Provides a framework for future CMB-based dark matter studies.
Abstract
We study the effects of dark matter annihilation during and after the cosmic recombination epoch on the cosmic microwave background anisotropy, taking into account the detailed energy deposition of the annihilation products. It is found that a fairly stringent constraint on the annihilation cross section is imposed for TeV scale dark matter masses from WMAP observations.
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