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arXiv 1208.4181astro-ph.HE
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最小宇宙成因中微子

Minimal Cosmogenic Neutrinos

Markus Ahlers, Francis Halzen

摘要:

观测到的超高能(UHE)宇宙射线(CR)通量保证了高能宇宙成因中微子的存在,这些中微子是通过CR在星系际空间传播的光强子相互作用产生的。这种中微子通量并不具有与未知CR源环境相关的许多不确定性。宇宙成因中微子的化学成分,源分布或演化和最大注入能量的UHE CR的有很强的模型依赖性。我们讨论的宇宙成因中微子光谱的下限,这取决于所观察到的UHE CR光谱和组合物,并直接涉及到实验观察和模型无关的数量。我们显示了明确的限制保守的假设源的演变。

英文摘要:

The observed flux of ultra-high energy (UHE) cosmic rays (CRs) guarantees the presence of high-energy cosmogenic neutrinos that are produced via photo-hadronic interactions of CRs propagating through intergalactic space. This flux of neutrinos doesn't share the many uncertainties associated with the environment of the yet unknown CR sources. Cosmogenic neutrinos have nevertheless a strong model dependence associated with the chemical composition, source distribution or evolution and maximal injection energy of UHE CRs. We discuss a lower limit on the cosmogenic neutrino spectrum which depends on the observed UHE CR spectrum and composition and relates directly to experimentally observable and model-independent quantities. We show explicit limits for conservative assumptions about the source evolution.

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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