Cosmological implications of Bumblebee vector models

TL;DR

This paper investigates how Bumblebee vector models, which involve spontaneous Lorentz symmetry breaking, can influence cosmological evolution, potentially explaining late-time accelerated expansion and constraining model parameters.

Contribution

It introduces a cosmological analysis of Bumblebee models with a non-zero time component, deriving dynamic equations and exploring their implications for universe expansion.

Findings

Late-time de Sitter expansion can be achieved

Constraints on the potential parameters are proposed

The model's physical significance in cosmology is analyzed

Abstract

The Bumblebee Model of spontaneous Lorentz symmetry breaking is explored in a cosmological context, considering a single non-zero time component for the vector field. The relevant dynamic equations for the evolution of the Universe are derived and its properties and physical significance studied. We conclude that a late-time de Sitter expansion of the Universe can be replicated, and attempt to constrain the parameter of the potential driving the spontaneous symmetry breaking.