Earth matter effects on the supernova neutrino spectra

Abstract

We explore the earth matter effects on the energy spectra of neutrinos from a supernova. We show that the observations of the energy spectra of ${\nu }_e$ and ${\bar{\nu }}_e$ from a galactic supernova may enable us to identify the solar neutrino solution, to determine the sign of $\Delta m_{32}^2$, and to probe the mixing matrix element $|U_{e3}{|}^2$ to values as low as $10^{-3}$. We point out scenarios in which the matter effects can even be established through the observation of the spectrum at a single detector.

Comments: 8 pages LaTeX, 2 eps figures, uses Rinton-P9x6.cls. Talk given at CICHEP '2001, Cairo, Egypt, January 2001