Abstract
Spin-flavor oscillations of Dirac neutrinos in matter and a magnetic field are studied using the method of relativistic quantum mechanics. Using the exact solution of the wave equation for a massive neutrino, taking into account external fields, the effective Hamiltonian governing neutrino spin-flavor oscillations is derived. Then the The consistency of our approach with the commonly used quantum mechanical method is demonstrated. The obtained correction to the usual effective Hamiltonian results in the appearance of the new resonance in neutrino oscillations. Applications to spin-flavor neutrino oscillations in an expanding envelope of a supernova are discussed. In particular, transitions between right-polarized electron neutrinos and additional sterile neutrinos are studied for realistic background matter and magnetic field distributions. The influence of other factors such as the longitudinal magnetic field, the matter polarization, and the non-standard contributions to the neutrino effective potential, is also analyzed.
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Original Russian Text © M.S. Dvornikov, 2012, published in Yadernaya Fizika, 2012, Vol. 75, No. 2, pp. 249–261.
The text was submitted by the author in English.
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Dvornikov, M.S. Spin-flavor oscillations of Dirac neutrinos described by relativistic quantum mechanics. Phys. Atom. Nuclei 75, 227–238 (2012). https://doi.org/10.1134/S1063778812020068
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DOI: https://doi.org/10.1134/S1063778812020068