[en] The electron-positron annihilation at high energies is reviewed through the Fire-String model. Good agreement between theoretical predictions and experimental data is noticed. The Fire-String approach shows that a good description can be achieved by a theory which properly provides for the quark confinement with no dynamical gluons. 12 refs.; 16 figs.; 1 table

[en] The physical properties of an extended meson are described throught mean-field equations for each of its constituents. For a model strictly confined in a space-time domain, the mass spectrum is calculated

[en] A realistic calculation of the semileptonic decays of B-mesons, which depends in an essential manner on the Kobayashi-Maskawa matrix elements Vsub(b->c) and Vsub(b->u) only, is presented. A very good fit to the experimental lepton spectrum is obtained for vertical strokeVsub(b->u)/Vsub(b->c)vertical stroke² = 0.10+-0.06, and from the world average for the B-lifetime (tausub(B) = 1.04+-0.15 ps), Vsub(b->c) = (5.9+-0.4)x10^-2 and Vsub(b->u) = (1.9+-0.5)x10^-2 are derived. (orig.)

[en] The fire-string approach is applied to study the structure of one-particle inclusive distributions and their energy dependence in high-energy e^-e⁺ annihilations. Differently from QCD we predict sizable scaling violations, which are found to be in good agreement with recent experimental data

[en] The fire string theory of e⁺e^- annihilation in hadrons is discussed. Such a theory allows to reproduce the most different and subtle aspects of hadronic production in terms of a very small number of inputs and of a set of simple theoretical ideas (C.P.)

[en] The NA5 discovery that triggering at large values of the transverse energy Esub(T), does not select automatically jet-like structures in high energy hadron-hadron collisions, is shown to have a natural explanation in the MQM/QGD framework. The role of high multiplicity events in producing large Esub(T)'s is discussed and clarified. (orig.)

[en] Starting from a method of series analysis, usually adopted in statistical mechanics, and from some results of potential theory, an approximation procedure for the calculation of the high-energy two-body elastic-scattering amplitude is proposed. The input is the perturbative expansion of the relevant S-matrix element in powers of a renormalized coupling constant. The method reproduces the lower perturbative terms and gives an extrapolation of the higher ones, which is appropriate in the high-energy region. In the framework of the phi⁴ model, the total cross-section, the ratio of the real to the imaginary part of the elastic two-body scattering amplitude and the elastic differential cross-section are calculated. The results show some general features of the two-body high-energy hadronic collisions. (author)

[en] In the MQM/QGD phenomenological approach to high energy hadronic behaviour we have calculated Deep Inelastic Scattering (DIS) structure functions in terms of one parameter. Very good agreement with experiment is obtained. In particular, differently from the Asymptotic Freedom prediction, the main origin of scaling violations appears to be a ''higher twist'' contribution, a crucial result which will possibly be tested at HERA. (orig.)

[en] It is shown that a complete understanding of the inclusive weak decays of the charmed mesons D⁺ can be achieved within the realistic approach to quark interactions provided by anisotropic chromodynamics (ACD). A possible qualitative explanation is offered for the observed different behaviours of the D⁰ and F⁺ mesons. Evidence against the nonleptonic 'enhancement' predicted by asymptotic freedom is found

[en] Baryon-antibaryon production in electron-positron annihilation at high energies is calculated in the framework of quark geometrodynamics and compared with existing experimental information. Good agreement is found between experiments and theory. (orig.)