CMB data constraint on self-annihilation of dark matter particles

Details CMB data constraint on self-annihilation of dark matter particles CMB data constraint on self-annihilation of dark matter particles

2010-01-26

arxiv.org/abs/1001.4691v3

INVISIBLE UNIVERSE: AIP Conference Proceedings Volume 1241, pp.216-223, 2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

a talk presented at the Invisible Universe International Conference at the Palais de l'UNESCO, Paris, v2: references added

Scientific paper

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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