# Neutrino oscillations in the Unruh radiation

## TL;DR

This paper demonstrates that neutrino oscillations occur in the Unruh thermal bath and that flavor neutrinos are essential as asymptotic states, extending the understanding of quantum field theory in accelerated frames.

## Contribution

It extends previous work on Unruh radiation by incorporating neutrino mixing and shows that neutrino oscillations naturally occur in the accelerated frame's thermal bath.

## Key findings

- Neutrino oscillations occur in the Unruh thermal bath.
- Flavor neutrinos are necessary as asymptotic states.
- The analysis confirms the consistency of neutrino mixing with the Unruh effect.

## Abstract

The study of the decay of an accelerated proton recently provided a theoretical proof of the Unruh effect. On the basis of general covariance of Quantum Field Theory, indeed, it was found that the decay rates in the inertial and comoving frames do coincide only when the thermal nature of the accelerated vacuum is taken into account. Such an analysis was then extended to the case with neutrino mixing. In this Letter, we show that, by further embedding neutrino oscillations in the above framework, general covariance necessarily entails the use of flavor neutrinos as asymptotic states, as well as the occurrence of neutrino oscillations in the Unruh thermal bath.