Abstract
The conservative hypothesis that the Universe is dominated by nonbaryonic matter made up of particles that have already been observed in the laboratory is not tenable within a standard big-bang cosmology if all neutrino species are stable. It can be salvaged only if one neutrino species has a mass in the range 0.1–250 MeV and decays on a short mass-dependent time scale, while a second species has a mass in the range 10–50 eV and is stable.
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Hut, P., White, S. Can a neutrino-dominated Universe be rejected?. Nature 310, 637–640 (1984). https://doi.org/10.1038/310637a0
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DOI: https://doi.org/10.1038/310637a0
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