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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2108.08341 (astro-ph)
[Submitted on 18 Aug 2021 (v1), last revised 20 Aug 2021 (this version, v2)]

Title:Update on the Combined Analysis of Muon Measurements from Nine Air Shower Experiments

Authors:Dennis Soldin (for the EAS-MSU, IceCube, KASCADE-Grande, NEVOD-DECOR, Pierre Auger, SUGAR, Telescope Array, and Yakutsk EAS Array Collaborations)
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Abstract:Over the last two decades, various experiments have measured muon densities in extensive air showers over several orders of magnitude in primary energy. While some experiments observed differences in the muon densities between simulated and experimentally measured air showers, others reported no discrepancies. We will present an update of the meta-analysis of muon measurements from nine air shower experiments, covering shower energies between a few PeV and tens of EeV and muon threshold energies from a few 100 MeV to about 10 GeV. In order to compare measurements from different experiments, their energy scale was cross-calibrated and the experimental data has been compared using a universal reference scale based on air shower simulations. Above 10 PeV, we find a muon excess with respect to simulations for all hadronic interaction models, which is increasing with shower energy. For EPOS-LHC and QGSJet-II.04 the significance of the slope of the increase is analyzed in detail under different assumptions of the individual experimental uncertainties.
Comments: Presented at the 37th International Cosmic Ray Conference (ICRC 2021)
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Report number: PoS-ICRC2021-349
Cite as: arXiv:2108.08341 [astro-ph.HE]
  (or arXiv:2108.08341v2 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2108.08341

Submission history

From: Dennis Soldin [view email]
[v1] Wed, 18 Aug 2021 18:33:04 UTC (2,180 KB)
[v2] Fri, 20 Aug 2021 19:18:44 UTC (2,180 KB)
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