Phenomenology of theories of gravity without Lorentz invariance: the preferred frame case

TL;DR

This paper reviews the phenomenological implications of gravity theories lacking Lorentz invariance, focusing on models with a preferred frame, which are potential low-energy limits of quantum gravity.

Contribution

It provides a comprehensive overview of the consequences of preferred frame theories of gravity, highlighting their phenomenological features and potential experimental signatures.

Findings

Preferred frame theories predict deviations from General Relativity.

These theories suggest possible observable effects in gravitational experiments.

They serve as low-energy effective models for quantum gravity.

Abstract

Theories of gravitation without Lorentz invariance are candidates of low-energy descriptions of quantum gravity. In this review we will describe the phenomenological consequences of the candidates associated to the existence of a preferred time direction