http://arxiv.org/abs/1404.1927
We propose different scenarios where a keV dark matter annihilates to produce a monochromatic signal. The process is generated through the exchange of a light scalar of mass of order 300 keV – 50 MeV coupling to photon through loops or higher dimensional operators. For natural values of the couplings and scales, the model can generate a gamma-ray line which can fit with the recently identified 3.5 keV X-ray line.
E. Dudas, L. Heurtier and Y. Mambrini
Thu, 15 May 14
8/55
Comments: 10 pages, 8 figures
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