Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-01-13
Phys.Rev.Lett. 80 (1998) 2039-2042
Astronomy and Astrophysics
Astrophysics
4 pages including 1 figure, accepted by Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.80.2039
We present a new strategy for measuring the electron neutrino mass ($\mnue$) by future detection of a Galactic supernova in large underground detectors such as the Super-Kamiokande (SK). This method is nearly model-independent and one can get a mass constraint in a straightforward way from experimental data without specifying any model parameters for profiles of supernova neutrinos. We have tested this method using virtual data generated from a numerical model of supernova neutrino emission by realistic Monte-Carlo simulations of the SK detection. It is shown that this method is sensitive to $\mnue$ of $\sim$ 3 eV for a Galactic supernova, and this range is as low as the prediction of the cold+hot dark matter scenario with a nearly degenerate mass hierarchy of neutrinos, which is consistent with the current observations of solar and atmospheric neutrino anomalies and density fluctuations in the universe.
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