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Constraints to the decays of Dirac neutrinos from SN 1987AThe decay mode of a keV-mass Dirac neutrino is addressed with reference to the nineteen neutrino events associated with SN 1987A that were detected by the Kamiokande II and Irvine-Brookhaven-Michigan detectors. A complementary constraint is presented which is based upon a distinctive signal associated with the decay of wrong-helicity neutrinos that was not seen: high-energy (50 MeV and higher) neutrino events. The absence of such events excludes the decay of wrong-helicity neutrinos into proper-helicity neutrinos for a Dirac neutrino of mass between 1 and 300 keV. The constraint also rules out models of the 17-keV neutrino.
Document ID
19920053625
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dodelson, Scott
(NASAFermilab Astrophysics Center Batavia, IL, United States)
Frieman, Joshua A.
(NASA Lewis Research Center Cleveland, OH, United States)
Turner, Michael S.
(NASAFermilab Astrophysics Center Batavia; Chicago, University, IL, United States)
Date Acquired
August 15, 2013
Publication Date
April 27, 1992
Publication Information
Publication: Physical Review Letters
Volume: 68
Issue: 17 A
ISSN: 0031-9007
Subject Category
Nuclear And High-Energy Physics
Accession Number
92A36249
Funding Number(s)
CONTRACT_GRANT: NAGW-2381
Distribution Limits
Public
Copyright
Other

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