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SN1987A and Constraint on the Mass and Lifetime of Tau Neutrinos

Published online by Cambridge University Press:  12 April 2016

Mariko Takahara  and
Katsuhiko Sato
Mariko Takahara
Affiliation:
Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
Katsuhiko Sato
Affiliation:
Departments of Physics, University of Tokyo, Tokyo, Japan

Extract

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Recently it has been suggested that neutrinos have nonvanishing mass from both experimental and theoretical investigations. Accelerator experiments and cosmology, however, impose the constraints on mass mv and lifetime τv of vτ (see Fig. 1). As we showed in the previous paper [1], supernova explosion also imposes the stringent constraint on them. The purpose of this paper is to investigate the constraint imposed on mv and τv of vτ from SN1987A.

Tau neutrinos are emitted from the central part of the iron core together with the electron neutrinos because they are also in thermal equilibrium with matter there.

Type
Part III. Chemical and Dynamical Structures of Exploding Stars
Information
International Astronomical Union Colloquium , Volume 108: Atmospherics Diagnostics of Stellar Evolution: Chemical Peculiarity, Mass Loss, and Explosion , 1988 , pp. 428 - 429
Copyright
Copyright © Springer-Verlag 1988

References

[1] Takahara, M. and Sato, K., Phys. Lett. 174B (1986) 373.CrossRefGoogle Scholar
[2] Takahara, M. and Sato, K., Modern Phys. Lett., A2 (1987) 293.CrossRefGoogle Scholar