Resolution of the factor-of-two discrepancy in the subleading soft waveform

Resolve the factor-of-two discrepancy between the Self-Force EFT prediction and the classical soft-graviton-theorem prediction for the \(\omega\log^2\omega\) term in the massless-massless gravitational-scattering waveform.

Background

The paper compares the soft-frequency expansion of the 1SF waveform with predictions from classical soft-graviton theorems. The linear-memory $1/\omega$ term and the $\log\omega$ tail agree with the external prediction, but the coefficient of the subleading $\omega\log^2\omega$ term differs by an overall factor of two.

The authors do not resolve whether the discrepancy arises from the Self-Force calculation, the soft-theorem prediction, conventions, or an omitted contribution. The issue is therefore left as an explicitly unresolved consistency problem.