Light neutrinos as cosmological dark matter and the next supernova
- Department of Physics, Tokyo Metropolitan University, Setagaya, Tokyo 158, Japan (JP)
We point out that the light-neutrino hypothesis for cosmological dark matter can be tested by observing a neutrino burst from a type-II supernova. With the luck of a nearby ({similar to}10 kpc) event watched by enlarged water Cherenkov detectors, such as the proposed super-Kamiokande, it might be possible to measure the tau- (heaviest-)neutrino mass. In such a case the statistically significant (4000--6000) {bar {nu}}{sub {ital e}} absorption events would allow the precise determination of the neutrino flux and the temperature. By using a simple model of neutrino emission based on the simulation by Mayle, Wilson, and Schramm, we show that the existence of the neutrino mixing can be signaled by 20--30 % excess of the scattering events in the water Cherenkov detector, and by factor {similar to}3 larger rate in Davis's {sup 37}Cl detector. The effect on the recoil electron energy spectrum is also analyzed.
- OSTI ID:
- 6807720
- Journal Information:
- Physical Review, D (Particles Fields); (USA), Vol. 41:10; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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