Constraint on the mass and lifetime of heavy neutrinos from the supernova 1987A in the Large Magellanic Cloud
If heavy neutrinos were emitted from the supernova 1987A in the Large Magellanic Cloud (LMC) and decayed outside the star, a ..gamma..-ray burst would have been observed after the ..nu..-burst. If this ..gamma..-ray burst was not observed, it would impose a constraint on the mass, m/sub ..nu../, and lifetime, tau/sub ..nu../, of heavy neutrinos. The authors investigate this constraint on the assumption that the ..gamma..-ray burst was not observed and obtain a more stringent constraint than that imposed by cosmology. They find that the range of mass and lifetime of tau neutrinos (m/sub ..nu../ -- 50 MeV, tau/sub ..nu../ -- 10/sup 3/ sec), which is allowed by previous constraints from experiments and cosmology, is completely prohibited by the present constraint provided that the radius of the progenitor of this supernova is less than 10/sup 13/ cm.
- Research Organization:
- Dept. of Astronomy, Faculty of Science, Univ. of Tokyo, Tokyo
- OSTI ID:
- 5800957
- Journal Information:
- Mod. Phys. Lett. A; (United States), Vol. 2:5
- Country of Publication:
- United States
- Language:
- English
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC NEUTRINOS
LIFETIME
MASS
NEUTRINOS
SUPERNOVAE
COSMIC GAMMA BURSTS
COSMOLOGY
HEAVY LEPTONS
LIMITING VALUES
COSMIC RADIATION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
POSTULATED PARTICLES
PRIMARY COSMIC RADIATION
RADIATIONS
STARS
VARIABLE STARS
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