Cosmology in doubly coupled massive gravity: constraints from SNIa, BAO and CMB

TL;DR

This paper tests a massive gravity model with a doubly coupled matter field against cosmological observations, finding it compatible with supernova, BAO, and CMB data at the one sigma level, supporting its viability as a dark energy candidate.

Contribution

First analysis of observational constraints on a doubly coupled massive gravity model using SNIa, BAO, and CMB data, demonstrating compatibility with background cosmological observations.

Findings

Model admits stable de Sitter solutions.

All background data are mutually compatible at one sigma.

Supports the model as a viable dark energy candidate.

Abstract

Massive gravity in the presence of doubly coupled matter field via en effective composite metric yields an accelerated expansion of the universe. It has been recently shown that the model admits stable de Sitter attractor solutions and could be used as a dark energy model. In this work, we perform a first analysis of the constraints imposed by the SNIa, BAO and CMB data on the massive gravity model with the effective composite metric and show that all the background observations are mutually compatible at the one sigma level with the model.