Ultrahigh energy neutrino scattering onto relic light neutrinos in galactic halo as a possible source of highest energy extragalactic cosmic rays

  title={Ultrahigh energy neutrino scattering onto relic light neutrinos in galactic halo as a possible source of highest energy extragalactic cosmic rays},
  author={D.Fargion and B.Mele and A.Salis},
The diffuse relic neutrinos with light mass are transparent to Ultrahigh energy (UHE) neutrinos at thousands EeV, born by photoproduction of pions by UHE protons on relic 2.73 K BBR radiation and originated in AGNs at cosmic distances. However these UHE ν s may interact with those (mainly heaviest ν µ r , ν τ r and respective antineutrinos) clustered into HDM galactic halos. UHE photons or protons, secondaries of νν r scattering, might be the final observed signature of such high-energy chain… 

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