Neutrino oscillations in a magnetic field are considered in the framework of the perturbative quantum field-theoretical approach with the distance-dependent propagator. This formalism is applied to describe the specific processes of solar neutrino oscillations, the extension and inhomogeneity of the source, which is the core of the Sun, are taken into account. Asymptotic formulas are obtained for the probability of neutrino oscillations in cases where neutrinos are detected through the weak charged- and neutral-current interactions. It is shown that the results obtained are in good agreement with the results of experiments on measuring the solar neutrino flux.
11.10.-z Field theory
14.60.Pq Neutrino mass and mixing
$^1$D.V. Scobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University
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