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arXiv 2408.01489hep-phastro-ph.HE
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中子星作为宇宙中微子背景的探针

Neutron Stars as a Probe of Cosmic Neutrino Background

Garv Chauhan

AI总结:

本研究探讨了宇宙中微子背景(CνB)与致密中子物质相干散射导致中子星(NS)额外冷却的机制,发现该冷却仅在存在大过密度时高效,并指出其可用于约束短尺度上的过密度及评估新物理场景的影响。

摘要:

宇宙中微子背景(CνB)构成了标准宇宙学模型中最后一个可观测的预测,但尚未被直接探测到。在本研究中,我们展示了中微子与致密中子物质相干散射如何在 neutron stars (NSs) 中导致一个额外的冷却通道。我们还考虑了引力捕获和加速效应,但发现只有在存在大过密度的情况下,这种冷却才是高效的。我们进一步讨论了来自邻近 NSs 的加速 CνB 通量在地球上的预测,以及未来邻近银河系超新星情况下的潜在探测前景。尽管目前这些想法并未提供任何探测前景,但它们可用于约束短长度尺度 $\mathcal{O}(10\text{ km})$ 上的过密度 $η\lesssim 10^{11}\textrm{-}10^{14}$。我们还讨论了新物理场景(如长程力)通过 CνB 对 NS 冷却的影响。

英文摘要:

The Cosmic Neutrino Background (C$ν$B) constitutes the last observable prediction of the standard cosmological model, which has yet to be detected directly. In this work, we show how the coherent scattering of neutrinos off dense neutron matter can lead to an additional cooling channel in neutron stars (NSs). We also include the effects of gravitational capture and boosting, but find that the cooling is efficient only in the presence of large overdensities. We further discuss the prediction of a boosted C$ν$B flux on Earth from nearby NSs and the potential detection prospects in the case of a future nearby galactic supernova. Although currently these ideas do not offer any detection prospects, they can be used to constrain overdensities $η\lesssim 10^{11}\textrm{-}10^{14}$ on short length scales $\mathcal{O}(10\text{ km})$. We also discuss the impact of new physics scenarios, such as long-range forces, on NS cooling through the C$ν$B.

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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