Multiparton scattering and production: an attempt

In previous treatments of multiple scattering in hadron-hadron collisions a sharp distinction was introduced between a soft part of the interaction, w hich generates the parton population and the hard part which produces the s cattering between forward and backward partons, this last being followed by other soft processes that give rise to the hadronization. This description is now modified in order to introduce into the dynamics th e possibility of hard production. The topics is not yet fully developed, bu t some definite examples are given and worked out.