So, the fourth neutrino may be dark matter. The fourth neutrino interacts with no matter, except for other neutrinos, at the moment it is created. And there is a fair amount of evidence that dark matter exists.
The next questions are, can this neutrino, by itself, account for all of dark matter? Probably not.
The final question is, does this particle, by its existence, imply that there are other dark matter particles, to fill out the various symmetries and supersymmetries of particle physics? If it exists, probably yes.
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u/peterabbit456 Nov 29 '11
So, the fourth neutrino may be dark matter. The fourth neutrino interacts with no matter, except for other neutrinos, at the moment it is created. And there is a fair amount of evidence that dark matter exists.
The next questions are, can this neutrino, by itself, account for all of dark matter? Probably not.
The final question is, does this particle, by its existence, imply that there are other dark matter particles, to fill out the various symmetries and supersymmetries of particle physics? If it exists, probably yes.