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arXiv 2404.00577gr-qchep-th
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在$f(Q)$引力中探究重子生成

Probing Baryogenesis in $f(Q)$ gravity

Sai Swagat Mishra, Aaqid Bhat, P. K. Sahoo

AI总结:

该研究在修改引力框架下探究重子不对称起源问题,结合$f(Q)$引力与引力重子生成,通过两类模型计算重子熵比并与观测值比对,同时约束该理论的额外自由度。

摘要:

宇宙中物质主导的起源是粒子物理与宇宙学领域最引人关注的未解谜题之一。尽管理论研究已取得诸多进展,但重子-反重子不对称性背后的真正成因仍未明确。本文的研究目标是在修改引力理论的框架下考察这一现象,这类理论已出色地解释了宇宙当前的加速膨胀及早期演化阶段。因此,本快讯聚焦于将修改引力的一个特定变体——即$f(Q)$引力——与引力重子生成相结合并对其加以约束的研究任务。我们考虑了幂律模型与近期提出的类DGP $f(Q)$模型,计算重子熵比并将其与观测值${n_B}/s=9.42\times 10^{-11}$进行比较。此外,我们还对该修改引力理论引入的额外自由度施加了约束。

英文摘要:

The origin of matter domination in the Universe is one of the most exciting open puzzles in particle physics and cosmology. Despite many theoretical developments, the actual reason behind baryon-antibaryon asymmetry is still unknown. Our aim here is to examine this phenomenon in the framework of modified gravity theories, which have impressively elucidated the contemporary accelerated expansion of the universe as well as the early phase. Consequently, this letter sets its sights on the task of constraining a specific variant of modified gravity, namely, $f(Q)$ gravity, in conjunction with gravitational baryogenesis. The Power Law model and recently proposed DGP-like $f(Q)$ models are considered to find the baryon-to-entropy ratio and compare them with the observed value, that is ${n_B}/s=9.42\times 10^{-11}$. Furthermore, we impose constraints on the additional degrees of freedom introduced by this modified theory of gravity.

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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