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arXiv 2107.09583astro-ph.HE
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用IceTop测量GeV μ子的密度

Density of GeV Muons Measured with IceTop

Dennis Soldin

摘要:

我们提出了一个测量的GeV μ介子的密度在近垂直的空气淋浴使用三年的数据记录的冰顶阵列在南极。我们推导出μ介子密度作为能量的函数,在600米和800米的参考距离为2.5 PeV和40 PeV之间的初级能量和9 PeV和120 PeV之间,分别在大气深度约$690\,\mathrm{g/cm}^2$。假设任何物理上合理的宇宙线通量模型,测量结果与从Sibyll~2.1获得的预测μ子密度一致。然而,与后LHC模型QGSJet-II.04和EPOS-LHC的比较表明,后LHC模型产生的μ子密度比Sibyll 2.1预测的要高,并且与2.5 PeV和120 PeV之间的空气簇射能量的实验数据有矛盾。

英文摘要:

We present a measurement of the density of GeV muons in near-vertical air showers using three years of data recorded by the IceTop array at the South Pole. We derive the muon densities as functions of energy at reference distances of 600 m and 800 m for primary energies between 2.5 PeV and 40 PeV and between 9 PeV and 120 PeV, respectively, at an atmospheric depth of about $690\,\mathrm{g/cm}^2$. The measurements are consistent with the predicted muon densities obtained from Sibyll~2.1 assuming any physically reasonable cosmic ray flux model. However, comparison to the post-LHC models QGSJet-II.04 and EPOS-LHC shows that the post-LHC models yield a higher muon density than predicted by Sibyll 2.1 and are in tension with the experimental data for air shower energies between 2.5 PeV and 120 PeV.

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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