Axion and dark photon limits from Crab Nebula high-energy gamma rays

  title={Axion and dark photon limits from Crab Nebula high-energy gamma rays},
  author={Xiao-Jun Bi and Yu Gao and Junguang Guo and Nick Houston and Tianjun Li and Fangzhou Xu and Xin Zhang},
  journal={Physical Review D},
  • X. Bi, Yu Gao, Xin Zhang
  • Published 5 February 2020
  • Physics, Materials Science
  • Physical Review D
The observation of cosmic sub-PeV gamma rays from the Crab Nebula opens up the possibility of testing cosmic ray photon transparency at the multi-hundred-TeV scale. Assuming no deviation from a source gamma-ray emission due to accelerated electron inverse-Compton scattering, higher event energies can extend constraints on the effects of new physics; we consider oscillation between gamma rays and axions, plus attenuation effects from gamma-ray absorption in the case of dark photon dark matter… 

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