Time-of-night variation of solar neutrinos

Abstract

We investigate the time-of-night variation of solar neutrino rate which will be of relevance to Super-Kamioka and Sudbury neutrino detectors in the framework of oscillations among the three flavors. An analytical method of computing the regeneration in the earth is presented. If day-night effect is seen, we show how the study of the time-of-night variation will allow the determination of the neutrino parameters.

4 Pages Revtex with three embedded figures. In the revised version the earth-regeneration effect has been calculated in an analytical formulation that takes into account the variation (both smooth and discontinuous) of the density in the earth. More graphs and refrences are also added