Determination of solar neutrino oscillation parameters using 1496 days of Super-Kamiokande-I data

Abstract

A number of different fits to solar neutrino mixing and mass square difference were performed using 1496 days of Super-Kamiokande-I's solar neutrino data. These data select two allowed areas at large neutrino mixing when combined with either the solar B-8 flux prediction of the standard solar model or the SNO interaction rate measurements. A global fit combining SK data with the solar neutrino interaction rates measured by Homestake, SNO, Gallex/GNO and SAGE prefers a single allowed area, the Large Mixing Angle solution, at the 98.9% confidence level. The mass square difference Deltam(2) between the two mass eigenstates ranges from about 3 to 19 X 10(-5) eV(2), while the mixing angle theta is in the range of tan(2)theta approximate to 0.25-0.65. (C) 2002 Elsevier Science B.V. All rights reserved.