Comment on “ Neutrino oscillations in the early universe : how can large lepton asymmetry be generated ? ”

@inproceedings{Bari2000CommentO,
  title={Comment on “ Neutrino oscillations in the early universe : how can large lepton asymmetry be generated ? ”},
  author={P. Di Bari and Robert Foot and Raymond R. Volkas and Y. Y. Wong},
  year={2000}
}
We comment on the recent paper by A. D. Dolgov, S. H. Hansen, S. Pastor and D. V. Semikoz (DHPS) [Astropart. Phys. 14, 79 (2000)] on the generation of neutrino asymmetries from active–sterile neutrino oscillations. We demonstrate that the approximate asymmetry evolution equation obtained therein is an expansion, up to a minor discrepancy, of the well-established static approximation equation, valid only when the supposedly new higher order correction term is small. In the regime where this so… CONTINUE READING