# Chiral symmetry breaking and the Unruh effect

## TL;DR

This paper investigates how acceleration can lead to chiral symmetry restoration in quantum chromodynamics, demonstrating that the Unruh effect has tangible consequences in particle physics.

## Contribution

It shows that chiral symmetry is restored at high accelerations, establishing a novel connection between the Unruh effect and QCD phase transitions.

## Key findings

- Chiral symmetry is restored at accelerations above 4πf_π.
- The results are analogous to finite-temperature chiral symmetry restoration.
- The study confirms the ontic nature of the Unruh effect in QCD context.

## Abstract

The possibility of chiral symmetry restoration by acceleration is considered. The Thermalization Theorem formalism and the large $N$ limit (with $N$ being the number of pions) are employed to solve the lowest-order approximation to QCD at low energies in Rindler spacetime. It is shown that chiral symmetry is restored for accelerations higher than the critical value $a_c=4\pi f_\pi$, with $f_\pi$ being the pion decay constant. The results are completely analogous to those obtained in the inertial, finite-temperature case, evincing the ontic character of the Unruh effect.