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Neutrino spin oscillations in gravitational fields

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Abstract

We study neutrino spin oscillations in black hole backgrounds. In the case of a charged black hole, the maximum frequency of oscillations is a monotonically increasing function of the charge. For a rotating black hole, the maximum frequency decreases with increasing angular momentum. In both cases, the frequency of spin oscillations decreases as the distance from the black hole grows. As a phenomenological application of our results, we study a simple bipolar neutrino system which is an interesting example of collective neutrino oscillations. We show that the precession frequency of the flavor pendulum as a function of the neutrino number density will be higher for a charged non-rotating black hole as compared with a neutral rotating one.

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Correspondence to S. A. Alavi.

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Alavi, S.A., Hosseini, S.F. Neutrino spin oscillations in gravitational fields. Gravit. Cosmol. 19, 129–133 (2013). https://doi.org/10.1134/S0202289313020023

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  • DOI: https://doi.org/10.1134/S0202289313020023

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