Neutrinos as Hot or Warm Dark Matter (Active + Sterile)
Neutrinos as Hot or Warm Dark Matter (Active + Sterile)
Neutrinos as Hot or Warm Dark Matter (Active + Sterile)
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As T ~ a few MeV in the Universe, the survival relativistic particleswere photons, electrons, positrons, neutrinos and antineutrinos.Electroweak reactions:F<strong>or</strong>mation of CB<strong>Neutrinos</strong> decoupled from matter:Weak interactionsNumber density of 6 relic ’s:Hubble expansion’s in thermal contact with cosmic pl<strong>as</strong>maneutrino and photontemperatures (blue)neutrino decoupling’s not in thermal contact with matterarrow of time
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