Role of π-mesonic sea of a nucleon in production of mesons with hidden flavor (phi, I/PSI, UPSILON)

Contribution of π-meson exchange mechanism to processes of meson hadroproduction with hidded flavor (phi, J/psi, psi') is discussed. Parametrization of differential cross sections of these meson production in πN collisions has been performed. Partoninterpretation of the model and, in particlar, parton compostion of pion cloud of nucleon is discussed Problem of hidden flavor meson production associatively with open flavor particules and related problem of overlapping of π-meson exchange diagrams have been considered. Results of calculations of psi, J/psi, phi' and UPSILON meson production cross sections in nucleon-nucleon collisions are given. A method for separation of contributions of quark-antiquark annihilation mechanisms and gluon-gluon coalescence to these processes has been suggested