abstract

A phenomenological model for cumulative processes is considered. This model assumes the formation of the compound-system by the initial nucleon and nuclear nucleons successively collected by it and the inclusive spectrum scale invariance of the decay products of this system. The model is almost independent of what happens when internucleon distances in nuclei are very small. Good agreement with the experimental data is obtained.

abstract

It is shown that a space-time formulation of the phenomenological model of cumulative processes based on the scheme of “gathering” of hadrons into a unique compound system can be used successfully for interpreting meson production and elastic scattering in processes involving even such a loose nucleus as a deuteron.

abstract

The “gathering” model for cumulative processes is applied to interpret the subthreshold production of antiprotons by nuclei. The comparison with the available experimental data is rather good. The results indicate the importance of the space-time factors in the hadron collective interactions at high energies.

abstract

Some characteristics of grey and black tracks (treated separately) produced in the interactions of high-energy hadrons with nuclei were investigated. Differences in the behaviour of these two groups of particles were shown. It has been concluded that one can use the number of grey tracks \(N_{\rm g}\) as the good measure of the number of collisions of the primary particles inside the nucleus. Furthermore we compared the experimental dependence of normalized multiplicity \(R\) on the mean number of collisions v with theoretical predictions in an interval of \(\bar \nu \) about twice as large as was possible in previous experiments (namely up to \(\bar \nu \approx 7\)).

abstract

Recent experimental data on the backward scattering of protons on \(^3\)He and \(^4\)He are analysed using the deuteron and triton exchange models. The absorption effects, which are included in the eikonal approximation, can change the cross section calculated in the plane wave Born approximation by one or two orders of magnitude. The theoretical predictions are compared with recent experimental data.

abstract

Assuming that in a high energy collision n pions are created, which carry a total isospin \(I = 0\), we develop a simple method for calculating the distribution over the different charge states. The method, although approximate, can reproduce some features of distributions and correlations of charged and neutral pions observed in experiment. In principle the method can also be used to calculate the distribution of the total number of created pions and of the neutral pions from the observed distribution of charged particles.

abstract

It is pointed out that Bose–Einstein symmetrization effects should be enhanced on nuclei, if the scattering process consists of separate elementary interactions. The enhancement is estimated and found large.

abstract

The quaternion formulation of the theory of classical vector field of general type is given. It is invariant under transformations of a 6 parameter group (the dyal symmetry group) which are defined on the field functions and do not involve the space-time coordinates. For the massless case the full group of internal symmetry is 10 parameter.

abstract

Using a polynomial interaction solitary wave propagator for spinless, self interacting mesons, a two nucleon potential is constructed in analogy with OBEP and previous solitary wave exchange potentials (SWEP). Since the solitary wave propagator automatically includes higher mass contributions, generalizations of OBEP are obtained without the introduction of new, arbitrary mass meson exchange. As with previous SWEP, the polynomial SWEP discussed in this paper compare favourably with phenomenological potentials but require only a few undetermined parameters.

abstract

Predictions of the modified cascade model for hadron–nucleus collisions proposed by Białkowski, Chiu and Tow are compared to the \(\pi ^-\)-carbon data at 40 GeV/\(c\).