Abstract
To research for a coplanarity of most energetic subcores of γ-ray–hadron families observed in cosmic-ray experiments at E 0 ≳ 10 16 eV (√ s ≳ 5 TeV), a new phenomenological FANSY 2.0 model is designed. The model makes it possible to simulate interactions for both traditional and coplanar hadron generation options, reproduces LHC data, including high-η and x F data on γ-rays and neutrons. An experiment at the LHC is proposed to test the model.