Late-time acceleration driven by shift-symmetric Galileon in the presence of Torsion

TL;DR

This paper introduces a novel shift-symmetric Galileon model incorporating spacetime torsion, demonstrating its capability to produce late-time cosmic acceleration consistent with standard cosmology when torsion is absent.

Contribution

First construction of a shift-symmetric Galileon model with spacetime torsion, applied to cosmology to explain late-time acceleration.

Findings

Model leads to late-time cosmic acceleration for various torsional structures.

Reproduces standard cosmological results when torsion vanishes.

Demonstrates the role of torsion in modifying cosmic evolution.

Abstract

A shift-symmetric Galileon model in presence of spacetime torsion has been constructed for the first time. This has been realized by localizing (or, gauging) the Galileon symmetry in flat spacetime in an appropriate manner. We have applied the above model to study the evolution of the universe at a cosmological scale. Interestingly, for a wide class of torsional structures we have shown that the model leads to late time cosmic acceleration. Furthermore, as torsion vanishes, our model reproduces the standard results.