On the hadronic contribution to sterile neutrino production

  title={On the hadronic contribution to sterile neutrino production},
  author={Takehiko Asaka and Mikko Laine and Mikhail Shaposhnikov},
Sterile neutrinos with masses in the keV range are considered to be a viable candidate for warm dark matter. The rate of their production through active-sterile neutrino transitions peaks, however, at temperatures of the order of the QCD scale, which makes it difficult to estimate their relic abundance quantitatively, even if the mass of the sterile neutrino and its mixing angle were known. We derive here a relation, valid to all orders in the strong coupling constant, which expresses the… CONTINUE READING

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