Constraining disformal couplings with Redshift Space Distortion
General Relativity and Quantum Cosmology
2023-03-10 v2 Cosmology and Nongalactic Astrophysics
Abstract
We study a quintessence model for which the scalar field is disformally coupled to dark matter. The background mimics the LCDM cosmological evolution and the quintessence potential is not specified. A disformal effect due to the quintessential mass is seen in the growth rate of the cosmological structure on large scales. The disformal parameter renders no appreciable effect on the evolution of the total matter perturbation. An analysis of the conformal parameter and quintessential mass is investigated using the Redshift Space Distortion data to find the best-fit values that might explain the well-known sigma-8 tension.
Cite
@article{arxiv.2112.04736,
title = {Constraining disformal couplings with Redshift Space Distortion},
author = {Avishek Dusoye and Alvaro de la Cruz-Dombriz and Peter Dunsby and Nelson J. Nunes},
journal= {arXiv preprint arXiv:2112.04736},
year = {2023}
}
Comments
20 pages, 3 figures, 1 table, Version published in JCAP01(2023)001, Minor Changes