Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density
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- 27 August 2013
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 111 (9) , 091301
Abstract
A gamma-ray excess from the Galactic center consistent with line emission around 130 GeV was recently found in the Fermi-LAT data. Although the Fermi-LAT Collaboration has not confirmed its significance, such a signal would be a clear signature of dark matter annihilation. Until now, there have been many attempts to explain the excess by dark matter. However, these efforts tend to give too-small cross sections into photons if consistency with the correct thermal relic density of dark matter is required. In this Letter, we consider a simple Yukawa interaction that can be compatible with both aspects and show which parameters are favored.Keywords
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