Neutrino degeneracy and the primordial abundance of helium and deuterium

Details Neutrino degeneracy and the primordial abundance of helium and deuterium Neutrino degeneracy and the primordial abundance of helium and deuterium

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983japa....4..301k&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 4, Dec. 1983, p. 301-306.

Astronomy and Astrophysics

Astrophysics

1

Abundance, Big Bang Cosmology, Deuterium, Helium, Neutrinos, Universe, Antineutrinos, Degeneration, Nuclear Fusion, Particle Mass

Scientific paper

Recent observations indicate that the primordial abundance of 4He could be smaller than 0.24. It may then be necessary to invoke neutrino degeneracy in the early universe to explain the primordial abundances of helium and deuterium. It is shown here that the necessary degeneracy, though small, gives rise to a large asymmetry between the present number densities of neutrinos and antineutrinos. The effect of degeneracy on the upper limit to the neutrino masses is also considered.

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