# Accelerated-Cherenkov radiation and signatures of radiation reaction

## TL;DR

This paper investigates how acceleration and recoil influence Cherenkov radiation emitted by a charged particle in an optical medium, revealing a resonance at the superluminal threshold that could enable precise tests of radiation reaction effects.

## Contribution

It introduces a theoretical framework combining acceleration and recoil effects in Cherenkov radiation, highlighting a resonance phenomenon useful for testing radiation reaction.

## Key findings

- Recoil and acceleration produce a sharp resonance in Cherenkov emission.
- A low-frequency spectral cutoff appears due to acceleration.
- The resonance peak can be used for high-precision radiation reaction tests.

## Abstract

In this manuscript we examine an accelerated charged particle moving through an optical medium, and explore the emission of accelerated-Cherenkov radiation. The particle's reaction to acceleration creates a low-frequency spectral cutoff in the Cherenkov emission that has a sharp resonance at the superluminal threshold. Moreover, the effect of recoil on the radiation is incorporated kinematically through the use of an Unruh-DeWitt detector by setting an energy gap, i.e., the change in electron energy, to the recoil energy of the emitted photon. The simultaneous presence of recoil and acceleration conspire to produce a localized resonance peak in the emission. These theoretical considerations could be used to construct high precision tests of radiation reaction using Cherenkov emission under acceleration.