We study the properties of the oscillation effects in the matter of the Earth on antineutrino fluxes from supemovae. We show that these effects can provide an explanation of the difference in the energy spectra of the events detected by Kamiokande-2 and 1MB detectors from SN 1987A as well as the absence of high-energy events with E≥40 MeV. This explanation requires the neutrino oscillation parameters Am2 and sin22θ to be in the region of the large mixing angle solution of the solar neutrino problem and the normal mass hierarchy if |Ue3|2≤10-3. The hierarchy can be inverted if | Ue|2≤ 10~3. The solution of the solar neutrino problem based on vf conversion to a pure sterile state is disfavored by SN 1987A data.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)