Abstract
One of phenomena observed in cosmic-ray experiments at E_0 gtrsim 10^{16} eV (sqrt{s} gtrsim 5 TeV) is a so-called coplanarity of most energetic subcores of gamma -ray–hadron families. This effect requires appearance of some coplanar generation of most energetic particles in hadron-nucleus interactions. To improve research for this phenomenon, a few versions of the new phenomenological FANSY 2.0 model are designed. This model makes it possible to simulate interactions via both traditional and coplanar hadron generation modes. The model reproduces ALICE, ATLAS, CMS, TOTEM data on low-rapidity particle generation, LHCf’s high-x_text {F} and high-eta data on gamma -rays and neutron-like hadrons as well as low-energy data on generation of stable and resonance hadrons, light-quark, strange and charmed particles. Features of coplanar particle generation of hadrons at superhigh energies are discussed. A test experiment at the LHC is proposed.
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