近日，北京理工大学的S. Kazempour及其研究团队取得一项新进展。经过不懈努力，他们揭示布莱恩-陈-西蒙斯大质量引力的宇宙学影响。相关研究成果已于2024年11月26日在国际知名学术期刊《高能物理杂志》上发表。

在本文中，研究人员提出一种新的大规模引力理论扩展——布莱恩-陈-西蒙斯大质量引力理论。研究人员通过推导背景方程并证明自加速解的存在性，探索了该理论的宇宙学意义。有趣的是，该理论表明存在一种源自有效宇宙学常数的自加速机制，这为理解宇宙加速的本质提供了非常有趣的可能性。

此外，研究人员还进行了张量扰动分析，以研究在此框架下引力波的传播。他们推导了引力波的色散关系，并在布兰-陈-西蒙斯大规模引力的框架下，研究了它们在弗里德曼-勒梅特-罗伯逊-沃克宇宙学中的行为。

附：英文原文

Title: The cosmological impact of Brane-Chern-Simons massive gravity

Author: Kazempour, S., Akbarieh, A. R.

Issue&Volume: 2024-11-26

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-Lematre-Robertson-Walker cosmology within the context of Brane-Chern-Simons massive gravity.

DOI: 10.1007/JHEP11(2024)135

Source: https://link.springer.com/article/10.1007/JHEP11(2024)135