Classical and quantum double copy of back-reaction

Tim Adamo*, Anton Ilderton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We consider radiation emitted by colour-charged and massive particles crossing strong plane wave backgrounds in gauge theory and gravity. These backgrounds are treated exactly and non-perturbatively throughout. We compute the back-reaction on these fields from the radiation emitted by the probe particles: classically through background-coupled worldline theories, and at tree-level in the quantum theory through three-point amplitudes. Consistency of these two methods is established explicitly. We show that the gauge theory and gravity amplitudes are related by the double copy for amplitudes on plane wave backgrounds. Finally, we demonstrate that in four-dimensions these calculations can be carried out with a background-dressed version of the massive spinor-helicity formalism.

Original languageEnglish
Article number200
Journal Journal of High Energy Physics
Issue number9
Publication statusPublished - 30 Sept 2020

Keywords / Materials (for Non-textual outputs)

  • Classical Theories of Gravity
  • Nonperturbative Effects
  • Scattering Amplitudes


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