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arXiv:astro-ph/0506520 (astro-ph)
[Submitted on 22 Jun 2005 (v1), last revised 12 Sep 2005 (this version, v3)]

Title:Dark Matter Annihilation: the origin of cosmic gamma-ray background at 1-20 MeV

Authors:Kyungjin Ahn, Eiichiro Komatsu
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Abstract: The origin of the cosmic gamma-ray background at 1-20 MeV remains a mystery. We show that gamma-ray emission accompanying annihilation of 20 MeV dark matter particles explains most of the observed signal. Our model satisfies all of the current observational constraints, and naturally provides the origin of "missing" gamma-ray background at 1-20 MeV and 511 keV line emission from the Galactic center. We conclude that gamma-ray observations support the existence of 20 MeV dark matter particles. Improved measurements of the gamma-ray background in this energy band undoubtedly test our proposal.
Comments: 5 pages, 3 figurs; Note added in proof, in response to Rasera et al. (astro-ph/0507707); published version in PRD, Rapid Communication
Subjects: Astrophysics (astro-ph); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:astro-ph/0506520
  (or arXiv:astro-ph/0506520v3 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0506520
Journal reference: Phys.Rev.D72:061301,2005
Related DOI: https://doi.org/10.1103/PhysRevD.72.061301

Submission history

From: Kyungjin Ahn [view email]
[v1] Wed, 22 Jun 2005 00:34:22 UTC (34 KB)
[v2] Thu, 23 Jun 2005 03:45:08 UTC (34 KB)
[v3] Mon, 12 Sep 2005 23:15:53 UTC (34 KB)
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