# Ricci dark energy in bumblebee gravity model

## TL;DR

This paper explores Ricci dark energy within bumblebee gravity, a Lorentz-violating theory, by solving modified Friedmann equations in different coupling scenarios to understand its cosmological implications.

## Contribution

It introduces the study of Ricci dark energy in bumblebee gravity, analyzing solutions with and without coupling, highlighting the effects of Lorentz symmetry breaking on cosmological models.

## Key findings

- Solutions for the modified Friedmann equations in two cases.
- Impact of the coupling constant on the cosmological evolution.
- Insights into Lorentz symmetry breaking effects on dark energy models.

## Abstract

The Ricci dark energy is a model inspired by the holographic dark energy models with the dark energy density being proportional to Ricci scalar curvature. Here this model is studied in the bumblebee gravity theory. It is a gravitational theory that exhibit spontaneous Lorentz symmetry breaking. Then the modified Friedmann equation is solved for two cases. In the first case the coupling constant $\xi$ is equal to zero. And in the second case a solution in the vacuum, where the bumblebee field becomes a constant that minimizes the potential, is considered. The coupling constant controls the interaction gravity-bumblebee.