  Hamiltonian eikonal model for multiple production in high energy
hadron-hadron collisions is presented and worked out with the aim of providing
a simple frame for various different observables. An important role is played
by unitarity which is built in by construction in the Hamiltonian formulation.
The eikonal approximation allows both a very effective simplification of the
dynamics, and facilitates the discussion on the relevance of possible spatial
inhomogeneities of the hadrons. The model is intended to describe only the hard
interaction of the constituents, the structure of the incoming hadrons and the
final hadronization processes are outside the scope of the present
investigation.
