Light neutrinos as cold dark matter

Details Light neutrinos as cold dark matter Light neutrinos as cold dark matter

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phlb..192...65r&link_type=abstract

Physics Letters B, Volume 192, Issue 1-2, p. 65-70.

Physics

24

Scientific paper

In the majoron model of Gelmini and Roncadelli, the neuutrino mean free path in the early universe is very small due to the large ν-ν scattering rate from majoron exchange. Free streaming of neutrinos would be entirely suppressed, because the free streaming scale is now replaced by a very short diffusion scale. If majorons have a mass larger than the lightest neutrino species, these neutrinos would constitute the dark matter of the universe and would form structure according to a cold dark-matter scenario, in spite of their small mass.

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