X-Ray Lines from Dark Matter Annihilation at the keV Scale.

@article{Brdar2018XRayLF,
  title={X-Ray Lines from Dark Matter Annihilation at the keV Scale.},
  author={V. Brdar and J. Kopp and J. Liu and Xiaoping Wang},
  journal={Physical review letters},
  year={2018},
  volume={120 6},
  pages={
          061301
        }
}
In 2014, several groups reported hints for a yet unidentified line in astrophysical x-ray signals from galaxies and galaxy clusters at an energy of 3.5 keV. While it is not unlikely that this line is simply a reflection of imperfectly modeled atomic transitions, it has renewed the community's interest in models of keV-scale dark matter, whose decay would lead to such a line. The alternative possibility of dark matter annihilation into monochromatic photons is far less explored, a lapse that we… Expand
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