Dark matter annihilation: The origin of cosmic gamma-ray background at 1-20 MeV
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.
- Authors:
-
- Department of Astronomy, University of Texas at Austin, 1 University Station, C1400, Austin, Texas 78712 (United States)
- Publication Date:
- OSTI Identifier:
- 20713503
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review. D, Particles Fields
- Additional Journal Information:
- Journal Volume: 72; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.72.061301; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; COSMIC GAMMA SOURCES; COSMIC PHOTONS; COSMOLOGY; GAMMA RADIATION; GAMMA SPECTRA; KEV RANGE; MEV RANGE; NONLUMINOUS MATTER; PHOTON EMISSION
Citation Formats
Ahn, Kyungjin, and Komatsu, Eiichiro. Dark matter annihilation: The origin of cosmic gamma-ray background at 1-20 MeV. United States: N. p., 2005.
Web. doi:10.1103/PhysRevD.72.061301.
Ahn, Kyungjin, & Komatsu, Eiichiro. Dark matter annihilation: The origin of cosmic gamma-ray background at 1-20 MeV. United States. https://doi.org/10.1103/PhysRevD.72.061301
Ahn, Kyungjin, and Komatsu, Eiichiro. 2005.
"Dark matter annihilation: The origin of cosmic gamma-ray background at 1-20 MeV". United States. https://doi.org/10.1103/PhysRevD.72.061301.
@article{osti_20713503,
title = {Dark matter annihilation: The origin of cosmic gamma-ray background at 1-20 MeV},
author = {Ahn, Kyungjin and Komatsu, Eiichiro},
abstractNote = {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.},
doi = {10.1103/PhysRevD.72.061301},
url = {https://www.osti.gov/biblio/20713503},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 6,
volume = 72,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 2005},
month = {Thu Sep 15 00:00:00 EDT 2005}
}
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