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arXiv 2012.04472gr-qcastro-ph.COastro-ph.GAhep-ph
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外尔不变引力与暗物质的性质

Weyl-Invariant Gravity and the Nature of Dark Matter

Meir Shimon

摘要:

通常被视为暗物质证据的星系和星系团中明显缺失的质量可能源自引力耦合参数$G$和活动引力质量$M_{act}$的梯度,而不是假设的超标准模型粒子。我们认为,在(弱场极限)的Weyl不变广义相对论的扩展,人们可以简单地影响的变化$Φ_{b}(x)\rightarrowΦ_{b}(x) + Φ_{DM}(x)$,其中$Φ_{b}$是重子源的潜力和$Φ_{DM}$是“过剩”的潜力。这是由$GM_{act}$的梯度和$O(-4Φ_{DM}(x))$的重子密度的分数增加,远低于目前的检测阈值在所有相关的尺度补偿。

英文摘要:

The apparent missing mass in galaxies and galaxy clusters, commonly viewed as evidence for dark matter, could possibly originate from gradients in the gravitational coupling parameter, $G$, and active gravitational mass, $M_{act}$, rather than hypothetical beyond-the-standard-model particles. We argue that in (the weak field limit of) a Weyl-invariant extension of General Relativity, one can simply affect the change $Φ_{b}(x)\rightarrowΦ_{b}(x) + Φ_{DM}(x)$, where $Φ_{b}$ is the baryon-sourced potential and $Φ_{DM}$ is the `excess' potential. This is compensated by gradients of $GM_{act}$ and a fractional increase of $O(-4Φ_{DM}(x))$ in the baryon density, well below current detection thresholds on all relevant scales.

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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