Massive Gravity and Lorentz Symmetry

TL;DR

This paper examines how ghost-free massive gravity theories may violate Lorentz symmetry, leading to observable effects in gravitational waves and Newtonian gravity.

Contribution

It analyzes Lorentz-symmetry properties of a specific massive gravity theory and identifies potential observable Lorentz-violating signals.

Findings

Potential Lorentz-violating effects in gravitational-wave signals

Possible deviations from Newton's law due to Lorentz symmetry breaking

Identification of observable signatures in gravitational experiments

Abstract

We consider Lorentz-symmetry properties of the ghost-free massive gravity theory proposed by de Rham, Gabadadze, and Tolley. In particular, we present potentially observable effects in gravitational-wave propagation and in Newton's law, including Lorentz-violating signals.