Inverted hierarchy of neutrino masses disfavored by supernova 1987A

Oct, 2000
15 pages
Published in:
  • Phys.Lett.B 504 (2001) 301-308
e-Print:
Report number:
  • TMUP-HEL-0019,
  • KIAS-P00067

Citations per year

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Abstract:
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}.
Note:
  • RevTex file, 15 pages, 4 postscript figures, typos corrected, version to appear in Physics Letters B Report-no: TMUP-HEL-0019, KIAS-P00067
  • supernova
  • neutrino: mass
  • mass: hierarchy
  • neutrino: mixing angle
  • flavor: 3
  • numerical calculations: interpretation of experiments