DBI Galileon and Late time acceleration of the universe

TL;DR

This paper explores a DBI Galileon model derived from a brane-world scenario to explain late-time cosmic acceleration, comparing it with DM and constraining parameters with observational data.

Contribution

It introduces a DBI Galileon effective field theory from brane embedding to model late-time universe acceleration, analyzing deviations from DM and fitting observational constraints.

Findings

Model shows deviations from DM in late-time acceleration.

Constraints on model parameters from observational data.

Potential to explain cosmic acceleration beyond standard DM.

Abstract

We consider 1+3 dimensional maximally symmetric Minkowski brane embedded in a 1+4 dimensional maximally symmetric Minkowski background. The resulting 1+3 dimensional effective field theory is of DBI (Dirac-Born-Infeld) Galileon type. We use this model to study the late time acceleration of the universe. We study the deviation of the model from the concordance \Lambda CDM behaviour. Finally we put constraints on the model parameters using various observational data.