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arXiv · 2404.18147

The Cosmological Impact of Brane-Chern-Simons Massive Gravity

Sobhan Kazempour·Amin Rezaei Akbarieh
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Abstract

In this paper, we present a novel extension of massive gravity theory; the Brane-Chern-Simons massive gravity theory. We explore the cosmological implications of this theory by deriving the background equations and demonstrating the existence of self-accelerating solutions. Interestingly, our theory suggests the existence of self-accelerating mechanisms that originate from an effective cosmological constant, leading to intriguing possibilities for understanding the nature of cosmic acceleration. Furthermore, we perform a tensor perturbation analysis to investigate the propagation of gravitational waves in this framework. We derive the dispersion relation for gravitational waves and study their behavior in the Friedmann-Lema\^itre-Roberson-Waker cosmology within the context of Brane-Chen-Simons massive gravity. Utilizing the latest Union2 type Ia supernova dataset comprising $557$ SNIa events, we provide observational support for our theoretical framework, indicating that the Brane-Chern-Simons massive gravity theory is consistent with cosmological observations.

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Sobhan Kazempour, Amin Rezaei Akbarieh. 2024-04-28. The Cosmological Impact of Brane-Chern-Simons Massive Gravity. https://doi.org/10.1007/jhep11(2024)135

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