Quantum Field-Theoretical Description of Neutrino Oscillations in a Magnetic Field and the Solar Neutrino Problem

It is shown that the processes of neutrino oscillations in a magnetic field can be consistently described framework new quantum field-theoretical approach without use flavor states. based on Feynman diagram technique with modified distance-dependent propagator, which takes into account geometry oscillation experiments. Processes field, where neutrinos are detected through weak charged- and neutral-current interaction, have been studied numerical calculations carried out for some specific examples. Implications solar briefly discussed, formulas asymptotic values normalized probability derived, coincide observable ratio measurable flux to predicted by standard model.