Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-10-20
Phys.Lett. B504 (2001) 301-308
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTex file, 15 pages, 4 postscript figures, typos corrected, version to appear in Physics Letters B
Scientific paper
10.1016/S0370-2693(01)00254-4
We discuss the flavor conversion of supernova neutrinos in the three-flavor mixing scheme of neutrinos. We point out that by neutrino observation from supernova one can discriminate the inverted hierarchy of neutrino masses from the normal one if s_{13}^2 \gsim a few \times 10^{-4}, irrespective of which oscillation solution to the solar neutrino problem is realized in nature. We perform an analysis of data of SN1987A and obtain a strong indication that the inverted mass hierarchy is disfavored unless s_{13}^2 \lsim a few \times 10^{-4}.
Minakata Hisakazu
Nunokawa Hiroshi
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