In this work we have discussed a simple dark matter model that may lead to a significant gamma ray spectral feature. It consists of real scalar DM particle that interacts with SM leptons through heavy vector-like charged fermions (the so-called ve...
In this work, we have studied further the constraints that may be set, using the Fermi-LAT data on the isotropic diffuse gamma-ray emission, on the parameter space of two simple, albeit generic, DM candidates, which has been shown to be consistent...
We thank Jean-Marie Frère for stimulating discussions. One of us (S.A.) thanks Michael Krämer. This work is supported by the FNRS, the IISN and the Belgian Federal Science Policy (IAP VI/11). Preprint ULB-TH/08-27.
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