Bigravity and Horndeski gravity connected by a disformal coupling

RADOUANE GANNOUJI , Md Wali Hossain, Nur Jaman, M. Sami

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this paper, we study bigravity theory in a very specific limit in which we focused only on 1 degree of freedom generated by the massive graviton. We analyze the model in the context of cosmology and demonstrate that the model can give rise to late-time cosmic acceleration as an attractor of the dynamical system. However, the observational constraints due to tensor perturbations are stringent, giving rise to large fine-tuning.

Original languageEnglish
Article number043504
JournalPhysical Review D
Volume99
Issue number4
DOIs
StatePublished - 15 Feb 2019

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