Update on the Combined Analysis of Muon Measurements from Nine Air Shower Experiment. (arXiv:2108.08341v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Soldin_D/0/1/0/all/0/1">Dennis Soldin</a> (for the EAS-MSU, IceCube, KASCADE-Grande, NEVOD-DECOR, Pierre Auger, SUGAR, Telescope Array, and Yakutsk EAS Array Collaborations)
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.
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.
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