Wednesday, July 24, 2013

1307.6181 (Takashi Toma)

Internal Bremsstrahlung Signature of Real Scalar Dark Matter and
Consistency with Thermal Relic Density

Takashi Toma
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.
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