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arXiv 0811.0375astro-ph
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UHE中微子的cosmic ray结果的意义

Implications of cosmic ray results for UHE neutrinos

Subir Sarkar

摘要:

最近对高能宇宙射线的光谱和成分的测量表明,它们的河外来源可能是加速质子以外的重核。相对于通常对全质子组成的预期,这可以抑制宇宙成因中微子通量。因此,宇宙中微子探测器可能需要比目前计划的更大,但相反,它们也将能够提供有关天体物理加速器的有价值的信息。此外,对高能宇宙中微子相互作用的测量可以提供一种独特的探测高部分子密度下QCD动力学的方法。

英文摘要:

Recent measurements of the spectrum and composition of ultrahigh energy cosmic rays suggest that their extragalactic sources may be accelerating heavy nuclei in addition to protons. This can suppress the cosmogenic neutrino flux relative to the usual expectation for an all-proton composition. Cosmic neutrino detectors may therefore need to be even larger than currently planned but conversely they will also be able to provide valuable information concerning astrophysical accelerators. Moreover measurement of ultrahigh energy cosmic neutrino interactions can provide an unique probe of QCD dynamics at high parton density.

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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