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arXiv 2203.09439astro-ph.CO
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衰变的暗物质能缓解$H_0$和$σ_8$的紧张关系吗?

Can decaying dark matter scenarios alleviate both $H_0$ and $σ_8$ tensions?

Zahra Davari, Nima Khosravi

摘要:

目前宇宙学中的紧张局势,包括$H_0$和$σ_8$,提供了一个强有力的理由来怀疑存在超越宇宙学标准模型($Λ$ CDM)的物理学。在本文中,我们调查,如果有这些紧张局势之间的关系,并超越冷暗物质的情况。为了模拟非CDM,我们假设一个衰变的暗物质(DDM)是不稳定的,可能会衰变成两个子粒子,冷暗物质,温暖的暗物质,和暗辐射的组合,探索一个广阔的时代的可能性。我们根据CMB数据检查了我们的模型,可以表明衰变的暗物质似乎不是解决宇宙学紧张局势的有希望的候选者。

英文摘要:

Current tensions in cosmology, including $H_0$ and $σ_8$, provide one of the strong reasons to suspect the existence of physics beyond the standard model of cosmology ($Λ$CDM). In this paper, we investigate if there is a relation between these tensions and beyond cold dark matter scenarios. To model non-CDM, we assume a decaying dark matter (DDM) which is unstable and may decay into two daughter particles, a combination of cold dark matter, warm dark matter, and dark radiation, to explore a vast era of possibilities. We checked our model against CMB data and could show that decaying dark matter seems not a promising candidate to address the cosmological tensions.

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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