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Cosmic ray energy spectra derived from KASCADE-Grande data using post-LHC hadronic interaction models

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arxiv 2508.21646 v1 pith:XL3ET4JV submitted 2025-08-29 astro-ph.HE

Cosmic ray energy spectra derived from KASCADE-Grande data using post-LHC hadronic interaction models

classification astro-ph.HE
keywords energyhadronickascade-grandemodelscomponentcosmicinteractionmass
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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KASCADE-Grande was dedicated to measuring the energy spectrum and mass composition of cosmic rays in the energy range of 10 PeV to 1 EeV. We observed a knee-like structure in the heavy mass component at around 100 PeV and an ankle-like structure in the light component. In this contribution, we present updated energy spectra based on shower size measurements, using the post-LHC hadronic models QGSJet-II-04, EPOS-LHC, and SIBYLL 2.3d, including accounting for shower-to-shower fluctuations. In addition, the newly released EPOS-LHC-R model is tested for the first time with KASCADE-Grande. We will compare and discuss the results obtained using the different hadronic interaction models.

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