Do neutrino rest masses affect cosmological helium production

Details Do neutrino rest masses affect cosmological helium production Do neutrino rest masses affect cosmological helium production

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrvl..45..669s&link_type=abstract

Physical Review Letters, vol. 45, Aug. 25, 1980, p. 669-672.

Physics

17

Big Bang Cosmology, Cosmic Rays, Elementary Particle Interactions, Helium, Neutrinos, Abundance, Dirac Equation, Distribution Functions, Relativistic Particles, Thermodynamic Equilibrium

Scientific paper

It is shown that the possibility of nonzero neutrino rest masses of 10 eV/sq cm does not alter previous predictions of the standard big-bang model for the primordial He-4 abundance. Although both leftand right-handed neutrinos could then be present, reactions mediated by the standard Weinberg-Salam-Glashow model extended to include Dirac neutrinos with nonzero rest mass cannot maintain right-handed neutrinos in thermal equilibrium.

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