Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215..387c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 2, May 1989, p. 387-398.
Astronomy and Astrophysics
Astrophysics
Neutrinos, Nuclear Astrophysics, Particle Mass, Supernova 1987A, Correlation, Emission Spectra, Neutron Stars, Pair Production
Scientific paper
A modified correlation mass method for calculating the value of a possible neutrino mass from neutrino bursts of astrophysical origin is proposed which can more sensitively detect small neutrino masses than previous methods. Application of the method to the neutrinos detected from SN 1987 A yields a value of 3.6 + or - 0.3 eV for the neutrino mass energy with a confidence level of 97 percent. Assuming a neutrino mass of 3.6 eV, and transforming all of the detected neutrino events back to the point of emission, it is shown that bursts are composed of a short initial pulse (which lasts for about 0.1 sec and contains 30-40 percent of the total neutrinos) and an extended emission lasting for about 10 sec.
Chan Kwing L.
Chiu Hong-Yee
Kondo Yoji
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