Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-09-29
Phys.Rev. D63 (2001) 073009
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, latex, 4 figures. New material is added to fig. 1. The discussion on Kamiokande and IMB signals (sect. 3) is extende
Scientific paper
10.1103/PhysRevD.63.073009
We study properties of the oscillation effects in the matter of the Earth on antineutrino fluxes from supernovae. We show that these effects can provide explanation of the difference in the energy spectra of the events detected by Kamiokande-2 and IMB detectors from SN1987A as well as the absence of high-energy events with $E\gta 40$ MeV. This explanation requires the neutrino oscillation parameters $\Delta m^2$ and $\sin^2 2\theta $ to be in the region of the LMA solution of the solar neutrino problem and the normal mass hierarchy if $|U_{e 3}|^2\gta 10^{-3}$. The hierarchy can be inverted if $|U_{e 3}|^2\ll 10^{-3}$. The solution of the solar neutrino problem based on $\nu_e$-conversion to a pure sterile state is disfavoured by SN1987A data.
Lunardini Cecilia
Smirnov Alexei Yu.
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