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arXiv 2402.01210astro-ph.COgr-qcnucl-th
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大爆炸核合成对能量-动量平方引力的约束:$\mathbb{T}^{2}$ 模型

Big Bang Nucleosynthesis constraints on the Energy-Momentum Squared Gravity: The $\mathbb{T}^{2}$ model

Dukjae Jang, Mayukh R. Gangopadhyay, Myung-Ki Cheoun, Toshitaka Kajino, M. Sami

AI总结:

本文利用大爆炸核合成的最新观测约束,限定能量-动量平方引力模型中弗里德曼方程的修正项,报告了相对于标准宇宙膨胀速率的允许偏差。

摘要:

尺度无关的能量-动量平方引力(EMSG)允许不同类型的源具有不同的引力耦合,并已被证明在宇宙学中具有有趣的影响。本文利用大爆炸核合成(BBN)形式体系以及关于核丰度的最新观测约束,来限定这类修正引力模型的参数范围。利用BBN对EMSG情景下弗里德曼方程中修正项的严格约束,我们报告了相对于标准宇宙膨胀速率的允许偏差。

英文摘要:

Scale-independent energy-momentum squared gravity (EMSG) allows different gravitational couplings for different types of sources and has been proven to have interesting implications in cosmology. In this paper, the Big Bang Nucleosynthesis (BBN) formalism and the latest observational constraints on nuclear abundances are being used to put bounds on this class of modified gravity models. Using the tight constraint from BBN on the correction term in the Friedmann equation in EMSG scenario, we report the allowed deviation from the standard cosmic expansion rate.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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