Determination of Probabilistic Parameters in the Neutrino–Antineutrino System

Using some results of our previous investigations, we calculate the probabilistic parameters describing the transformations νi → νj, $${{\bar {\nu }}_{i}}$$ → $${{\bar {\nu }}_{j}}$$ (i, j = e, μ, τ; i ≠ j), and νi $$ \leftrightarrow $$ $${{\bar {\nu }}_{j}}$$ (i, j = e, μ, τ), which occur, among other things, with the nonconservation of the neutrino lepton numbers, as well as average numbers of ν and $$\bar {\nu }$$ . A possible contribution of such mutual transformations to the known effect of solar neutrino deficit is considered.