XXth International Conference on Neutrino Physics and Astrophysics

Poster Abstract

Jai Sam Kim

Full Numerical Estimation of Neutrino Mixing Parameters from Solar Neutrino Data

We present the results of our lengthy numerical analysis of the solar neutrino data. Within the framework of three active neutrinos undergoing MSW mechanism through the solar interior and the earth and full chi^2 analysis we give an estimation of the best fit values of mixing parameters by looking for the minimum of the minima of chi^2.

m_2^2-m_1^2 = 5.38 x 10^(-6) eV^2
sin^2(2 theta_12) = 5.51 x 10^(-3)
theta_13 = 5 deg

with the minimum of chi_min^2 = 13.1 for the three rates (Cl + Ga + SK) only. Inclusion of SNO yields similar numbers. The chi_min^2 in the LMA region are ~30 and thus ruled out. We tried two values for (m_2^2-m_1^2), 2.2 x 10^(-4) and 2.2 x 10^(-3). The lower value is slightly favored (13.1 vs 13.5) not decisive.

Based on Kim et al., Comp. Phys. Comm. 120, 41 (1999) and Comp. Phys. Comm. 135, 176 (2001).

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