Neutrino Dark Matter
Caldwell, David O.
Original · EN
There is a puzzling contradiction: direct observations favor a low-mass density universe, but the only model which fits universe structure over more than three orders of magnitude in distance scale has a mix of hot (neutrino) and cold dark matter consistuting a critical density universe. If all present indications for neutrino mass are valid, that hot dark matter is shared by two neutrino species (nuₘu and nuₜau). These results also require at least one light sterile neutrino to exist to explain the solar nuₑ deficit (nuₑ -> nuₛ), so that nuₘu -> nuₜau accounts for the atmospheric neutrino anomaly, with anti-nuₘu -> anti-nuₑ being observed in the LSND experiment. This experiment, when analyzed appropriately, does not conflict with any others and is compatible with the mass difference needed for dark matter. Support for this mass pattern is provided by the need for a sterile neutrino to make possible heavy-element nucleosynthesis in supernovae.
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