A model for a non-minimally coupled scalar field interacting with dark matter

TL;DR

This paper explores a cosmological model where a non-minimally coupled scalar field interacts with dark matter, successfully explaining the Universe's accelerated expansion and matching key observational parameters.

Contribution

It introduces a novel cosmological model with a non-minimally coupled scalar field interacting with dark matter, aligning theoretical predictions with observational data.

Findings

Model reproduces density parameter evolution

Matches observed deceleration parameter

Aligns with luminosity distance measurements

Abstract

In this work we investigate the evolution of a Universe consisted of a scalar field, a dark matter field and non-interacting baryonic matter and radiation. The scalar field, which plays the role of dark energy, is non-minimally coupled to space-time curvature, and drives the Universe to a present accelerated expansion. The non-relativistic dark matter field interacts directly with the dark energy and has a pressure which follows from a thermodynamic theory. We show that this model can reproduce the expected behavior of the density parameters, deceleration parameter and luminosity distance.