Limit on electron antineutrino mass from observation of the beta decay of molecular tritium

Details Limit on electron antineutrino mass from observation of the beta decay of molecular tritium Limit on electron antineutrino mass from observation of the beta decay of molecular tritium

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..67..957r&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 67, Aug. 19, 1991, p. 957-960.

Other

86

Antineutrinos, Electron Radiation, Energy Spectra, Particle Energy, Particle Mass, Tritium, Atomic Energy Levels, Computerized Simulation, Inelastic Scattering, Maximum Entropy Method, Monte Carlo Method

Scientific paper

An experimental upper limit of 9.3 eV is reported for the electron antineutrino with a 95 percent confidence level from measurements of the shape of the beta decay spectrum of free molecular tritium. An assumption of no new physics other than that of mass is made. If the Hubble constant is 50 km/s Mpc or greater, the electron neutrino cannot by itself close the universe. The data also show that the time dispersion of neutrino events from SN 1987A is not dominated by neutrino mass, but rather must reflect the actual cooling of the protoneutron star.

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