Large gauge effects and the structure of amplitudes

Andrea Cristofoli*, Asaad Elkhidir, Anton Ilderton, Donal O’Connell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We show that large gauge transformations modify the structure of momentum conservation leading to non-vanishing three-point amplitudes in a simple toy model of a gravitational wave event. This phenomenon resolves an apparent tension between perturbative scattering amplitude computations and exact methods in field theory. The tension is resolved to all orders of perturbation theory once large gauge effects are included via a modified LSZ prescription; if they are omitted, perturbative methods only recover a subset of terms in the full non-perturbative expression. Although our results are derived in the context of specific examples, several aspects of our work have analogues in dynamical gravitational scattering processes.

Original languageEnglish
Article number204
Pages (from-to)1-40
Number of pages40
Journal Journal of High Energy Physics
Issue number6
Publication statusPublished - 29 Jun 2023

Keywords / Materials (for Non-textual outputs)

  • Classical Theories of Gravity
  • Scattering Amplitudes


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