  The stochastic model of classical system of particles (partons), which
dynamics includes random walk in plane as well as processes of death,
splitting, annihilation and fusion of partons, is considered. A set of
equations for multiparticle distribution functions for this system can be
described in terms of diagrams of the Reggeon Field Theory (RFT) with
supercritical pomeron, where rapidity plays a role of the time variable. The
multiparticle inclusive distributions of partons correspond to multi-pomeron
states in this analogy. In order to calculate the amplitude of hadron
interaction at given energy we define an operator of linkage of any pair of
partons from two parton sets (the projectile and the target). The form of the
hadron-interaction (parton-linkage) operator is determined from the requirement
for the result to be in correspondence to the RFT formulas. It is shown that
the requirement of Lorentz invariance of the amplitude is fulfilled in this
interpretation only at definite relation between the probabilities of parton
splitting, annihilation and fusion. Interpretation of various methods of
s-channel unitarization is discussed in terms of the model.
