## XXth International Conference on Neutrino Physics and Astrophysics

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).