A study of dark matter-dark energy interaction under the DESI DR2 data constraint

TL;DR

This paper investigates a field-theoretic model where dark matter and dark energy interact, analyzing its impact on cosmological parameters and tensions using DESI DR2 data.

Contribution

It introduces a novel interacting dark sector model with a thorough analysis of its effects and constraints based on recent cosmological data.

Findings

Constraints on interaction strength from DESI DR2 data

Impact on dark energy equation of state

Potential alleviation of Hubble tension

Abstract

While $\Lambda$CDM provides a good fit to cosmological data, it fails to address many of the outstanding questions in contemporary cosmology. Chief among these are the Hubble tension and the apparent dynamical nature of dark energy as inferred from the recent DESI DR2 analysis. In this work, we analyze a field-theoretic description of cosmology where both dark energy and dark matter are interacting spin zero fields. We give a thorough study of a wide range of the interaction strength and demonstrate the effect on the dark energy equation of state and the Hubble tension. Using the recent cosmological data, we extract constraints on cosmological parameters including the free parameters of the model.