skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
;  [1]
  1. 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}
}