Photon decay into neutrinos in a strong magnetic field

@article{DeRaad1976PhotonDI,
  title={Photon decay into neutrinos in a strong magnetic field},
  author={Lester L. DeRaad and Kimball A. Milton and N. D. Hari Dass},
  journal={Physical Review D},
  year={1976},
  volume={14},
  pages={3326-3334}
}
The real photon decay, $\ensuremath{\gamma}\ensuremath{\rightarrow}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, is calculated in strong magnetic fields ($H\ensuremath{\sim}{10}^{13}$ G) using a version of Schwinger's mass operator technique, which makes use of the explicit form of the electron Green's function. The reaction is kinematically allowed by an index of refraction less than one. This latter condition may arise either from quantum electrodynamics (high frequencies) or from the effects… 

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