  A number of characteristics of the new fundamental interaction are described.
The interaction is carried by a massless pseudoscalar boson and extends to at
least the electron neutrino, proton, and neutron. A substantiation of the
existence of such an interaction is supported by an good agreement between the
theoretical and experimental rates of all the five observed processes with
solar neutrinos. A bright manifestation of the new interaction is expected in
the observation that its contribution to the rate of splitting of a number of
light stable nuclei by reactor antineutrinos is approximately six orders of
magnitude greater than the contribution of electroweak interaction.
