Gravitational waves from the R^-1 high order theory of gravity

TL;DR

This review discusses gravitational waves in the R^-1 high order gravity theory, highlighting a massive scalar mode that produces a longitudinal force detectable by interferometers, offering a way to test gravitational theories.

Contribution

It reviews previous research on gravitational waves from the R^-1 gravity theory and analyzes the unique longitudinal effects of the scalar mode on interferometer responses.

Findings

Massive scalar mode causes a longitudinal force.

Interferometer response to this mode is computed.

Potential to distinguish gravitational theories using signals.

Abstract

This paper is a review of a previous research on gravitational waves from the R^-1 high order theory of gravity. It is shown that a massive scalar mode of gravitational waves from the R^-1 theory generates a longitudinal force in addition of the transverse one which is proper of the massless gravitational waves and the response of an arm of an interferometer to this longitudinal effect in the frame of a local observer is computed. Important conseguences from a theoretical point of view could arise from this approach, because it opens to the possibility of using the signals seen from interferometers to understand which is the correct theory of gravitation.