Astrophysics and cosmology closing in on neutrino masses

Details Astrophysics and cosmology closing in on neutrino masses Astrophysics and cosmology closing in on neutrino masses

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990sci...250.1529d&link_type=abstract

Science (ISSN 0036-8075), vol. 250, Dec. 14, 1990, p. 1529-1533.

Astronomy and Astrophysics

Astrophysics

1

Cosmology, Neutrinos, Nuclear Astrophysics, Particle Mass, Muons, Neutron Stars, Strong Interactions (Field Theory), Weak Interactions (Field Theory)

Scientific paper

Massive neutrinos are expected in most grand unified theories that attempt to unify the strong and electroweak interactions. So far, heroic laboratory experiments have yielded only upper bounds on the masses of the elusive neutrinos. These bounds, however, are not very restrictive and cannot even exclude the possibility that the dark matter in the universe consists of neutrinos. The astrophysical and cosmological bounds on the masses of the muon and tau neutrinos, m(numu) and m(nutau), which already are much more restrictive than the laboratory bounds, and the laboratory bound on the mass of the electron neutrino, m(nue) can be improved significantly by future astrophysical and cosmological observations that perhaps will pin down the neutrino masses. Indeed, the recent results from the solar neutrino experiments combined with the seesaw mechanism for generating neutrino masses suggest that m(nue) of about 10 to the -8th electron volts, m(numu) of about 0.001 electron volts, and m(nutau) of about 10 electron volts, which can be tested in the near future by solar neutrino and accelerator experiments.

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