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arXiv 2602.08338astro-ph.COgr-qchep-ph
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永恒之暗物质

Dark Matter from Eternity

Università degli Studi di Padova(帕多瓦大学);INFN, Sezione di Padova(意大利国家核物理研究所帕多瓦分部);CERN(欧洲核子研究组织);Université de Genève(日内瓦大学)

G. Franciolini, M. Peloso, A. Riotto

AI总结:

该研究提出暗物质可能源于永恒膨胀,通过引力坍缩形成原始黑洞,并预测了引力波背景的特性。

摘要:

我们提出宇宙中全部暗物质可能源于宇宙膨胀的关键特性,即其可能永恒性:在宇宙原始加速膨胀结束时,某些区域从未被重新加热,但持续永恒膨胀,这些区域在我们可观测的宇宙中表现为原始黑洞。这种机制可以提供比标准情况更大的原始黑洞丰度,因为辐射阶段中较大的过密度会通过引力坍缩形成。它还预测了曲率扰动的宽谱和一个平坦的随机引力波背景,其水平约为Ω_GW h²≈10⁻¹⁰,直到mHz范围。

英文摘要:

We propose that the totality of dark matter in the universe might ascribe its origin to one of the key properties of cosmological inflation, that it may be eternal: regions that at the end of the primordial accelerated expansion of the universe never reheated, but keep eternally inflating, manifest themselves as primordial black holes in our observable universe. This mechanism can provide a primordial black hole abundance which is larger than the standard one due to the gravitational collapse of sizeable overdensities in the radiation phase. It also predicts a broad spectrum for the curvature perturbation and a flat stochastic gravitational wave background at a level of $Ω_\text{GW} h^2 \simeq 10^{-10}$ up to the mHz.

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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