The multiplicity distribution of charged particles in pp-collisions in the range 5–300 GeV/c is explained on the basis of a dynamical model which leads to a specific mixture of Poisson distributions.

Topological cross sections for diffractive and nondiffractive components in pp collisions are deduced on the basis of a dynamical model proposed earlier to explain the multiplicity distribution of charged particles. The model has an important prediction for the angular and momentum distributions of charged particles in diffractive events.

The charge transfer from one hemisphere to the other, observed inpp-collisions is explained on the basis of a ‘mixed two component’ model, which has been proposed previously to account for the multiplicity distribution of charged particles. Results of the calculations, based on the model, for various measurable quantities relating to charge transfer are compared with the available experimental data.

We calculate the yield ofψ (3105) particles in N-N collisions in a model which associates the production of heavy particles with largeP_T phenomenon. Our results show thatψ (3105) has a fairly strong coupling to other hadrons. We propose a criterion in the search for charmed particles and a parametrization for the expected yields of such particles.

A connection between the elastic scattering and the inclusive one-particlek_T² distribution is pointed out in the context of thes channel unitarity. One of the implications of this connection is that the slope of thek_T² distribution atk_T²=0 is about a factor two larger than the slope of the elastic scattering att=0.

The production of prompt neutrinos in the beam dump experiment is explained in a cluster model, by postulating the emission of strange clusters in hadron collisions, besides the usual non-strange clusters. The low mass strange clusters can decay only by the weak interaction. The leptonic and semi-leptonic decay modes of these clusters give rise to prompt neutrinos. A prediction of the model is that the ratios <v_e>/π⁺ at PS energies would be the same as SPS energies.

The observed dependence of the yield of highpT particles on the atomic numberA of the target and the incident energy, inp-a, a-a andp-nucleus collisions, is explained in a coherent tube model.