Study of muon signal discrepancy between data and simulations at 10^17.5 eV in hybrid events

B. ANDRADA, F. SANCHEZ, A. ALMELA, A. M. BOTTI, A. ETCHEGOYEN, J. M. FIGUEIRA, A. FUSTER, B. GARCIA,; F. GESUALDI, N. GONZALEZ, M. R. HAMPEL, J. HULSMAN, A. LUCERO, D. MELO, S. MULLER, M. PERLIN,; M. PLATINO, D. RAVIGNANI, M. RONCORONI, C. SARMIENTO-CANO, M. SCORNAVACCHE, G. SILLI, A. TABOADA, B. WUNDHEILER

Encuentro; Pierre Auger Internal GAP-Note 2019_047; 2019

In this work, we present the first results of a study of signal discrepancies between data and simulations with Golden Hybrid events measured with the SD-750 and HeCo. We follow the strategy of previous works but at lower energies. We see a difference in the signal of the Water-Cherenkov detectors between the acquired and simulated events of about 25% and 20% for proton and iron initiated showers andQGSJet-II-04 respectively. The observed discrepancy is attributable to the muon deficit in simulations. These results are compatible with those obtained with the Underground Muon Detector in the same energy range.