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arXiv 2406.01682hep-phastro-ph.COhep-ex
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中微子-超轻暗物质相互作用对宇宙中微子背景的影响

Effects of Neutrino-Ultralight Dark Matter Interaction on the Cosmic Neutrino Background

Pablo Martínez-Miravé, Yuber F. Perez-Gonzalez, Manibrata Sen

AI总结:

本文研究了超轻暗物质与惰性中微子相互作用通过活性-惰性混合对宇宙中微子背景的影响,发现该作用会引起中微子质量的红移依赖性,需重新解释质量总和限制,并可能改变早期宇宙中微子质量排序及PTOLEMY类实验的事件率。

摘要:

与惰性中微子相互作用的超轻暗物质会通过活性-惰性中微子混合改变宇宙中微子背景的演化和性质。我们研究了此类相互作用如何在中微子质量中引起红移依赖性。我们强调,由于中微子-暗物质相互作用产生的有效质量,对中微子质量总和的宇宙学限制需要重新解释。此外,我们给出了一个例子,说明与今天预期的情况相比,此类相互作用如何改变早期宇宙中中微子的质量排序。我们还探讨了在类似PTOLEMY实验中预期的事件率变化,该实验旨在通过中微子俘获探测宇宙中微子背景,并讨论了预期的限制。

英文摘要:

Ultralight dark matter interacting with sterile neutrinos would modify the evolution and properties of the cosmic neutrino background through active-sterile neutrino mixing. We investigate how such an interaction would induce a redshift dependence in neutrino masses. We highlight that cosmological constraints on the sum of neutrino masses would require reinterpretation due to the effective mass generated by neutrino-dark matter interactions. Furthermore, we present an example where such interactions can alter the mass ordering of neutrinos in the early Universe, compared to what we expect today. We also address the expected changes in the event rates in a PTOLEMY-like experiment, which aims to detect the cosmic neutrino background via neutrino capture, and discuss projected constraints.

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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