Lorentz-violating neutrino oscillations

Lorentz-violating neutrino oscillation refers to the quantum phenomenon of neutrino oscillations described in a framework that allows the breakdown of Lorentz invariance. Today, neutrino oscillation or change of one type of neutrino into another is an experimentally verified fact; however, the details of the underlying theory responsible for these processes remain an open issue and an active field of study.

Source: Wikipedia — Lorentz-violating neutrino oscillations (CC BY-SA 4.0)