CMB data constraint on self-annihilation of dark matter particles

Jaiseung Kim; Pavel Naselsky

doi:10.1063/1.3462637

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arXiv · 1001.4691

CMB data constraint on self-annihilation of dark matter particles

Jaiseung Kim·Pavel Naselsky

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Abstract

Recently, self-annihilation of dark matter particles is proposed to explain the "WMAP Haze" and excess of energetic positrons and electrons in ATIC and PAMELA results. If self-annihilation of dark matter occurs around the recombination of cosmic plasma, energy release from self-annihilation of dark matter delays the recombination, and hence affects CMB anisotropy. By using the recent CMB data, we have investigated the self-annihilation of dark matter particles. In this investigation, we do not find statistically significant evidence, and impose an upper bound on / m_chi. The upcoming data from Planck surveyor and the Fermi Gamma-ray telescope will allow us to break some of parameter degeneracy and improve constraints on self-annihilation of dark matter particles.

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Jaiseung Kim, Pavel Naselsky. 2010-08-10. CMB data constraint on self-annihilation of dark matter particles. https://doi.org/10.1063/1.3462637

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