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Dodelson, S; Widrow, LM
Physical review letters, 01/1994, Letnik: 72, Številka: 1Journal Article
The simplest model that can accommodate a viable nonbaryonic dark matter candidate is the standard electroweak theory with the addition of right-handed (sterile) neutrinos. We consider a single generation of neutrinos with a Dirac mass mu and a Majorana mass ital M for the right-handed component. If ital Mmuch gtmu (standard hot dark matter corresponds to ital M=0), then sterile neutrinos are produced via oscillations in the early Universe with energy density independent of ital M. However, ital M is crucial in determining the large scale structure of the Universe; for ital Msimilar to100 eV, sterile neutrinos make an excellent warm dark matter candidate.
