Neutrino propagator in media: spin properties and spectral representation
1 Irkutsk State University, K. Marx str., 1, 664003, Irkutsk, Russia
2 Joint Institute for Nuclear Research, 141980, Dubna, Russia
Published online: 3 April 2019
We have found that in case of propagation of neutrino in the moving matter or external magnetic field there is a fixed 4-axis of polarization, which corresponds to spin projectors commute with a propagator. It means that, states with the definite spin projection on this axis in media have a definite dispersion law. The presence of this axis essentially simplifies the eigenvalue problem and allows one to build spectral representation of the propagator in media.
© The Authors, published by EDP Sciences, 2019
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