COPLANAR EMISSION OF NEUTRAL AND CHARGED COMPONENTS OF GAMMA-HADRON FAMILIES AT ENERGIES 10(15)-10(17) EV

Separate treatment of gamma-quanta and hadrons in gamma - h families a nd considerably increased statistic of experimental events enabled us to determine some new features of the mechanism responsible for the co planar emission phenomenon of most energetic secondaries in nuclear in teractions at 10(15) divided by 10(17) eV. The influence of selection criteria and methodical distortions on the search for coplanar events is analyzed. It is shown that model combining the semihard diffraction of the projectile hadron and, probably, generation of baryons of new higher-color quark sextet can produce the experimental effects rather than well-known physical factors.