Cosmological models with interacting components and mass-varying neutrinos

TL;DR

This paper investigates a cosmological model of a flat universe with interacting dark energy, dark matter, and neutrinos, focusing on mass-varying neutrinos and their effects on cosmic evolution.

Contribution

It introduces and compares models where dark energy interacts with dark matter and neutrinos, highlighting the equivalence of different interaction models for slowly varying scalar fields.

Findings

Models reproduce observed red-shift behavior of the universe

Interacting models yield similar results for slowly varying fields

Mass-varying neutrinos influence cosmic evolution

Abstract

A model for a homogeneous and isotropic spatially flat Universe, composed of baryons, radiation, neutrinos, dark matter and dark energy is analyzed. We infer that dark energy (considered to behave as a scalar field) interacts with dark matter (either by the Wetterich model, or by the Anderson and Carroll model) and with neutrinos by a model proposed by Brookfield et al.. The latter is understood to have a mass-varying behavior. We show that for a very-softly varying field, both interacting models for dark matter give the same results. The models reproduce the expected red-shift performances of the present behavior of the Universe.