A comparison study of CORSIKA and COSMOS simulations for extensive air showers
Soonyoung Roh (1,2), Jihee Kim (1), Dongsu Ryu (1), Hyesung Kang (3),, Katsuaki Kasahara (4), Eiji Kido (4), Akimichi Taketa (5) ((1) Chungnam, National University, Korea, (2) Nagoya University, Japan, (3) Pusan National, University, Korea, (4) ICRR, University of Tokyo, Japan
TL;DR
This study compares two Monte Carlo simulation codes, CORSIKA and COSMOS, for modeling extensive air showers caused by ultra-high energy cosmic rays, highlighting differences and implications for cosmic ray experiments.
Contribution
It provides a detailed comparison of CORSIKA and COSMOS simulation outputs for extensive air showers, which aids in interpreting UHECR experimental data.
Findings
Differences in longitudinal particle distribution between codes
Variations in depth of shower maximum predictions
Discrepancies in ground-level energy and particle distributions
Abstract
Cosmic rays with energy exceeding ~ 10^{18} eV are referred to as ultra-high energy cosmic rays (UHECRs). Monte Carlo codes for extensive air shower (EAS) simulate the development of EASs initiated by UHECRs in the Earth's atmosphere. Experiments to detect UHECRs utilize EAS simulations to estimate their energy, arrival direction, and composition. In this paper, we compare EAS simulations with two different codes, CORSIKA and COSMOS, presenting quantities including the longitudinal distribution of particles, depth of shower maximum, kinetic energy distribution of particle at the ground, and energy deposited to the air. We then discuss implications of our results to UHECR experiments.
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