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arXiv · 2307.12561

Majorana Phase And Matter Effects In Neutrino Chiral Oscillation

Ming-Wei Li·Zhong-Lv Huang·Xiao-Gang He
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Abstract

Due to finite masses and mixing, for neutrinos propagation in space-time, there is a chiral oscillation between left- and right- chiral neutrinos, besides the usual oscillation between different generations. The probability of chiral oscillation is suppressed by a factor of $m^2/E^2$ making the effect small for relativistic neutrinos. However, for non-relativistic neutrinos, this effect can be significant. In matter, the equation of motion is modified. When neutrinos produced in weak interaction pass through the matter, the eigen-energies are split into two different ones depending on the helicity of the neutrino. This results in different oscillation behavior for neutrinos with different helicity, in particular there is a new resonant effect related to the helicity state of neutrino different than the usual MSW effect. For Majorana neutrinos, chiral oscillation also depends on Majorana phases.

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Ming-Wei Li, Zhong-Lv Huang, Xiao-Gang He. 2023-07-24. Majorana Phase And Matter Effects In Neutrino Chiral Oscillation. https://doi.org/10.1016/j.physletb.2024.138778

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