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T: Fachverband Teilchenphysik

T 58: Cosmic Rays III

T 58.6: Vortrag

Mittwoch, 2. April 2025, 17:30–17:45, VG 3.102

comparing hadronic interaction models with air shower parameters at the IceCube Neutrino Observatory — •Fahim Varsi¹, Mark Weyrauch², Dennis Soldin³, and Timo Peter Lemmer¹ for the IceCube collaboration — ¹Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, Karlsruhe, Germany — ²Karlsruhe Institute of Technology, Institute for Astroparticle Physics, Karlsruhe, Germany — ³Department of Physics and Astronomy, University of Utah, Salt Lake City, USA

The IceCube Neutrino Observatory studies cosmic-ray extensive air showers (EASs) using a surface array of ice-Cherenkov detectors, known as IceTop, by detecting the electromagnetic component and low-energy (~GeV) muons of EASs. A new reconstruction method, utilizing different lateral distribution functions (LDFs) for the electromagnetic and muonic components of the detector signals, is applied to estimate the shower size and low-energy muon content of EASs on an event-by-event basis. However, due to systematic uncertainties in high-energy hadronic interaction models, the simulated predictions of these EAS parameters show a significant dependence on the high-energy interaction models. Consequently, a detailed study of these systematic uncertainties in the reconstructed parameters provides insights into model-dependent variations in cosmic-ray air shower studies. In this work, we compare the EAS parameters reconstructed using three hadronic interaction models: Sibyll 2.1, QGSJet-II.04, and EPOS-LHC, and the results will be presented at the conference.

Keywords: cosmic rays; extensive air shower; hadronic interaction models; air shower reconstruction