Research Article

Quasi-Classical Gravity Effect on Neutrino Oscillations in a Gravitational Field of a Heavy Astrophysical Object

Figure 1

The quasi-classical gravity processes which destroy the coherence of the neutrino flavor eigenstate () at the quantum level effectively turning it to a mass eigenstate (), the gravitational Bethe-Heitler-type scattering of neutrino off a massive object, for example, a black hole (a) and the gravitational Compton scattering (b). The dark ellipse is a projection to a fixed mass state and the shaded circle is a classical source of the gravitational field.