On the Mass Eigenstate Composition of the 8B Neutrinos from the Sun

The present data of gallium experiments provide indirectly the only experimental limit on the fraction of $ν_2$ mass eigenstate for the $^8$B neutrinos from the Sun. However, if to use the experimental data alone, the fraction of $ν_2$ and, consequently, $sin^2θ_{sol}$ still is allowed to be varied within a rather broad range. The further experimental efforts are needed to clear this point.

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