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

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.

5 pages, 3 figures, accepted for publication in PRL

References in corpus (10)

• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• New Gamma-Ray Contributions to Supersymmetric Dark Matter Annihilation
• Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects
• Fermi 130 GeV gamma-ray excess and dark matter annihilation in sub-haloes and in the Galactic centre
• On the Importance of Electroweak Corrections for Majorana Dark Matter Indirect Detection
• Three Exceptions for Thermal Dark Matter with Enhanced Annihilation to Gamma Gamma
• Right-handed Sneutrino Dark Matter in Supersymmetric B-L Model
• The 130 GeV Fingerprint of Right-Handed Neutrino Dark Matter
• Dark matter in the supersymmetric radiative seesaw model with an anomalous U(1) symmetry
• Signals of dark matter in a supersymmetric two dark matter model

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