Two-photon annihilation of singlet cold dark matters due to noncommutative space-time

@article{Ettefaghi2012TwophotonAO,
  title={Two-photon annihilation of singlet cold dark matters due to noncommutative space-time},
  author={M. M. Ettefaghi},
  journal={Physical Review D},
  year={2012},
  volume={86},
  pages={085038}
}
Detecting the cosmic rays, in particular gamma-ray, coming from the dark matter annihilation or decay is an indirect way to survey the nature of the dark matter. In the commutative space-time, the annihilation of the dark matter candidates (WIMPs) to photons proceeds through loop corrections. However, it is possible for WIMPs as well as the other standard model singlet particles to couple with photons directly in the noncommutative space-time. In this paper, we study two-photon annihilation of… 
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