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arXiv · 1808.04137

Bigravity and Horndeski gravity connected by a disformal coupling

Radouane Gannouji·Md. Wali Hossain·Nur Jaman·M. Sami
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Abstract

In this paper, we have studied bi-gravity theory in a very specific limit where we focused only on one degree of freedom generated by the massive graviton. We have analyzed the model in the context of cosmology and demonstrated 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.

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Radouane Gannouji, Md. Wali Hossain, Nur Jaman, M. Sami. 2018-08-13. Bigravity and Horndeski gravity connected by a disformal coupling. https://doi.org/10.1103/physrevd.99.043504

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