Lorentz violation in gravity

TL;DR

This paper discusses the theoretical framework and phenomenological implications of gravity models that violate Lorentz invariance, emphasizing the role of a preferred time direction in such theories.

Contribution

It introduces the construction and advantages of Lorentz-violating gravitational theories and explores their phenomenological consequences.

Findings

Identification of key features of Lorentz-violating gravity models

Discussion of phenomenological implications of a preferred time direction

Highlights of advantages in alternative gravitational theories

Abstract

The study of gravitational theories without Lorentz invariance plays an important role to understand different aspects of gravitation. In this short contribution we will describe the construction, main advantages and some phenomenological considerations associated with the presence of a preferred time direction.