The Cosmology of Asymmetric Brane Modified Gravity

TL;DR

This paper explores an asymmetric brane modified gravity model that can explain late-time cosmic acceleration, comparing it to standard and DGP models, and analyzing how an extra parameter influences the universe's expansion.

Contribution

It introduces a one-parameter extension of the DGP model within asymmetric brane gravity and studies its impact on cosmological expansion.

Findings

The asymmetric brane model can produce late-time acceleration.

The model extends DGP gravity with an additional parameter.

The expansion history is significantly affected by this parameter.

Abstract

We consider the asymmetric branes model of modified gravity, which can produce late time acceleration of the universe and compare the cosmology of this model to the standard $\Lambda$CDM model and to the DGP braneworld model. We show how the asymmetric cosmology at relevant physical scales can be regarded as a one-parameter extension of the DGP model, and investigate the effect of this additional parameter on the expansion history of the universe.