The present data of gallium experiments provide indirectly the only
experimental limit on the fraction of ν2​ mass eigenstate for the 8B
neutrinos from the Sun. However, if to use the experimental data alone, the
fraction of ν2​ and, consequently, sin2θsol​ still is allowed to
be varied within a rather broad range. The further experimental efforts are
needed to clear this point.Comment: 13 pages, 1 figure, 1 table. Corrected version, published in
JCAP04(2007)00