The Unruh effect for mixing neutrinos

TL;DR

This paper demonstrates that the Unruh effect remains valid for mixing neutrinos by explicitly calculating decay rates for both inertial and accelerated observers, confirming their agreement despite previous concerns.

Contribution

The study clarifies the compatibility of the Unruh effect with neutrino mixing, providing explicit calculations that resolve prior doubts.

Findings

Decay rates agree for inertial and accelerated observers

Unruh effect is valid for mixing neutrinos

Resolves previous concerns about neutrino mixing and the Unruh effect

Abstract

Recently, the inverse $\beta$-decay rate calculated with respect to uniformly accelerated observers (experiencing the Unruh thermal bath) was revisited. Concerns have been raised regarding the compatibility of inertial and accelerated observers' results when neutrino mixing is taken into account. Here, we show that these concerns are unfounded by discussing the properties of the Unruh thermal bath with mixing neutrinos and explicitly calculating the decay rates according to both sets of observers and confirming that they are in agreement. The Unruh effect is perfectly valid for mixing neutrinos.