Gravitational memory contributions to waveform and effective action

TL;DR

This paper employs Effective Field Theory to derive gravitational waveforms and effective actions, highlighting radiation-reaction effects and confirming energy-momentum balance consistent with gravitational radiation fluxes.

Contribution

It introduces a novel EFT-based derivation of gravitational waveforms and effective actions, emphasizing radiation-reaction effects and energy-momentum balance.

Findings

Waveform matches previous multipolar-post-Minkowskian results

Effective action reproduces energy and angular momentum balance equations

Radiation-reaction terms significantly influence the energy-momentum exchange

Abstract

We use Effective Field Theory techniques to derive the quadrupole-quadrupole part of the gravitational wave, obtaining a waveform in agreement with previous results found within the multipolar-post-Minkowskian method. In particular we emphasize the role of radiation-reaction terms, which affect the energy-momentum balance between source and radiation. An in-in effective action is then derived along the same principles and it is shown to provide energy and angular momentum balance equations in agreement with the corresponding fluxes carried at infinity by gravitational radiation.