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arXiv 2405.04568hep-phastro-ph.COastro-ph.HE
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来自宇宙射线储库的遗迹中微子背景

Relic Neutrino Background from Cosmic-Ray Reservoirs

Andrea Giovanni De Marchi, Alessandro Granelli, Jacopo Nava, Filippo Sala

AI总结:

本文计算星系团宇宙射线储库中UHECR向上散射的RνB通量,结合截面、成分和味信息给出IceCube限制及未来实验检验范围。

摘要:

我们计算了在充当宇宙射线(CR)储库的星系团中,被超高能(UHE)宇宙射线向上散射的遗迹中微子背景(RνB)通量。UHECR的长捕获时间使该通量大于UHECR在前往地球途中向上散射的RνB通量,我们也计算了后一种通量。我们发现IceCube排除了星系团中大于10^10的RνB加权过密度,而PUEO、RNO-G、GRAND和IceCube-Gen2将检验低至10^8的数值。我们的处理纳入了中微子–核截面的动量转移依赖性、深度非弹性散射、混合UHECR成分,以及在中微子质量谱正序和倒序两种情形下向上散射RνB通量的味信息,为可能区分向上散射RνB与宇宙成因中微子提供了新的抓手。

英文摘要:

We compute the flux of relic neutrino background (R$ν$B) up-scattered by ultra-high-energy (UHE) cosmic rays (CRs) in clusters that act as CR-reservoirs. The long trapping times of UHECRs make this flux larger than that of R$ν$B up-scattered by UHECRs on their way to Earth, which we also compute. We find that IceCube excludes R$ν$B weighted overdensities larger than $10^{10}$ in clusters, and that PUEO, RNO-G, GRAND and IceCube-Gen2 will test values down to $10^{8}$. Our treatment incorporates the momentum transfer dependence of the neutrino-nucleus cross section, deep inelastic scattering, a mixed UHECR composition, and flavour information on the up-scattered R$ν$B fluxes for both cases of neutrino mass spectrum with normal and inverted ordering, providing new handles to possibly disentangle the up-scattered R$ν$B from cosmogenic neutrinos.

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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