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Constraints on power law and exponential models in f(Q) gravity
Physics Letters B ( IF 4.3 ) Pub Date : 2024-11-05 , DOI: 10.1016/j.physletb.2024.139113
Dalale Mhamdi, Farida Bargach, Safae Dahmani, Amine Bouali, Taoufik Ouali

In this paper, we observationally test the f(Q) gravity model at both background and perturbation levels using Pantheon+, Hubble measurements, and Redshift Space Distortion Data. We obtain the best-fit parameters by solving numerically the modified Friedmann equations for two distinct cosmological models of f(Q) gravity namely the Power law and Exponential models. This involves performing a Markov Chain Monte Carlo analysis for these specific forms of f(Q). To evaluate the statistical significance of the f(Q) gravity models, we use the Bayesian and corrected Akaike Information Criteria. Our results indicate that the Exponential model in f(Q) gravity is statistically favored over both the Power-law model and the ΛCDM model.

中文翻译:


f(Q) 引力中幂律和指数模型的约束



在本文中,我们使用 Pantheon+、哈勃测量和 Redshift 空间畸变数据在背景和扰动水平上对 f(Q) 重力模型进行了观测测试。我们通过对 f(Q) 引力的两个不同宇宙学模型(即幂定律和指数模型)的修正弗里德曼方程进行数值求解来获得最佳拟合参数。这涉及对这些特定形式的 f(Q) 执行马尔可夫链蒙特卡洛分析。为了评估 f(Q) 重力模型的统计显著性,我们使用贝叶斯和校正的 Akaike 信息准则。我们的结果表明,f(Q) 引力中的指数模型在统计上优于幂律模型和 ΛCDM 模型。
更新日期:2024-11-05
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