Two anomalous halo events obtained during the Hadron-44 experiment on Tien-Shan cosmic ray station

During the “Hadron-44” experiment on Tien-Shan cosmic ray station, two anomalous halo events were obtained. These events are characterized by two peaks in calorimeter layers: at 500 g/cm and at 1000 g/cm. Monte Carlo simulation (Corsika and Geant4 packages were used) showed that the obtained experimental data can’t be explained by simulation perfectly. In xrec-part of an installation simulation predict a higher primary energy than experimental methods gave. In calorimeter part the second peak can be hardly explained by high-energy muon interactions with a matter of calorimeter. Simulation gives a probability about 0,5%.