Cosmological aspects of a vector field model

TL;DR

This paper explores a DGP-inspired braneworld model with Lorentz invariance violation, demonstrating its ability to explain phantom divide crossing, match observed cosmological evolution, and exhibit Rip singularities.

Contribution

It introduces a Lorentz violating DGP brane model with parameters that account for phantom crossing and cosmological evolution, including Rip singularity solutions.

Findings

Model can explain crossing of phantom divide line.

Model aligns with observed cosmological behavior.

Identifies Rip singularity solutions in the model.

Abstract

We have studied a DGP-inspired braneworld scenario where the idea of Lorentz invariance violation has been combined into a specifying preferred frame that embed a dynamical normal vector field to brane. We propose the Lorentz violating DGP brane models with enough parameters can explain crossing of phantom divide line. Also we have considered the model for proper cosmological evolution that is according to the observed behavior of the equation of state. In other view point, we have described a Rip singularity solution of model that occur in this model.