ИСТИНА

A new QFT approach is applied to describe neutrino oscillations. It is based on the Feynman diagram technique in the coordinate representation supplemented by modified rules of passing to the momentum representation. The latter reflect the geometry of neutrino oscillation experiments and lead to a modification of the Feynman propagators of the neutrino mass eigenstates in the momentum representation. The approach allows one to consistently describe oscillations in vacuum, field or matter, and to consider processes with charged and neutral weak currents. The advantages of the approach are technical simplicity and physical transparency. Particles are described by plane waves.