Late time cosmic acceleration in modified SáezBallester theory
Abstract
We establish an extended version of the modified SáezBallester (SB) scalartensor theory in arbitrary dimensions whose energy momentum tensor as well as potential are pure geometrical quantities. This scenario emerges by means of two scalar fields (one is present in the SB theory and the other is associated with the extra dimension) which widens the scope of the inducedmatter theory. Moreover, it bears a close resemblance to the standard SáezBallester scalartensor theory, as well as other alternative theories to general relativity, whose construction includes either a minimally or a nonminimally coupled scalar field. However, contrary to those theories, in our framework the energy momentum tensor and the scalar potential are not added by hand, but instead are dictated from the geometry. Concerning cosmological applications, our herein contribution brings a new perspective. We firstly show that the dark energy sector can be naturally retrieved within a strictly geometric perspective, and we subsequently analyze it. Moreover, our framework may provide a hint to understand the physics of lower gravity theories.
 Publication:

arXiv eprints
 Pub Date:
 November 2019
 arXiv:
 arXiv:1911.03901
 Bibcode:
 2019arXiv191103901R
 Keywords:

 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 19 pages, 1 figure