Speaker
Description
The results of direct measurements of the muon density in extensive air showers (EAS) with zenith angles $\theta \leq 45^\circ$ and energies $Е_0\geq 10^{17}$ eV obtained in the Auger experiment and at the Yakutsk array are considered. In both cases muons were registered by underground scintillation detectors with the same threshold energy $Е_{\mu}\approx 1.0 \times \sec \theta$ GeV. The measured values are compared with the theoretical values calculated within the framework of QGSjet-II-04 hadron interaction model using the CORSIKA code. They differ from each other by the factor of 1.53 ± 0.13(stat). It is shown that this difference is due to the muon density overestimation by a factor of 1.22 and the primary energy underestimation by a factor of 1.25 in the Auger experiment.
