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Journal Article

Atmospheric neutrinos, νe-vs oscillations, and a novel neutrino evolution equation


Akhmedov,  Evgeny Kh.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Akhmedov, E. K. (2016). Atmospheric neutrinos, νe-vs oscillations, and a novel neutrino evolution equation. Journal of high energy physics: JHEP, 2016(08): 153. doi:10.1007/JHEP08(2016)153.

Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-9948-A
If a sterile neutrino nu_s with an eV-scale mass and a sizeable mixing to the electron neutrino exists, as indicated by the reactor and gallium neutrino anomalies, a strong resonance enhancement of nu_e-nu_s oscillations of atmospheric neutrinos should occur in the TeV energy range. At these energies neutrino flavour transitions in the 3+1 scheme depend on just one neutrino mass squared difference and are fully described within a 3-flavour oscillation framework. We demonstrate that the flavour transitions of atmospheric nu_e can actually be very accurately described in a 2-flavour framework, with neutrino flavour evolution governed by an inhomogeneous Schroedinger-like equation. Evolution equations of this type have not been previously considered in the theory of neutrino oscillations.