Exploring evidence of interaction between dark energy and dark matter

TL;DR

This paper investigates potential interactions between dark energy and dark matter using multiple cosmological observations, finding significant evidence for such interactions in two models, though further research is necessary for confirmation.

Contribution

It provides new constraints on dark sector interaction models by combining diverse observational data, including recent BOSS BAO measurements.

Findings

Two models show >3σ evidence of interaction.

Combining multiple probes enhances detection sensitivity.

Further studies are needed to confirm interactions.

Abstract

In this work we use the latest observations on SNIa, $H(z)$, BAO, $f_{gas}$ in clusters and CMBR, to constrain three models showing an explicit interaction between dark matter and dark energy. In particular, we use the BOSS BAO measurements at $z \simeq 0.32$, $0.57$ and $2.34$, using the full 2-dimensional constraints on the angular and line of sight BAO scale. We find that using all five observational probes together, two of the interaction models show positive evidence at more than 3 $ \sigma $. Although significant, further study is needed to establish this statement firmly.