No abstract available

No abstract available

[en] We present the calculation of the elastic πd scattering which for the first time, extends from threshold to Tsub(π)=260 MeV with a consistent inclusion of the intermediate π absorption. The overall agreement with recent experiments is good except above the Δ-resonance energy: the disagreement might possibly be due to our neglect of the controversial dibaryon resonances

[en] Semi-local duality is imposed on an infinite sum of ladder graphs in the framework of DTU. This leads to a generic Regge-trajectory formula which when applied to entire sets of processes, gave powerful self-consistency conditions. We are then able to calculate the masses of ordinary and multiquark hadrons. The only arbitrary parameter is the mass of the rho, which merely serves to set the mass scale. We are also explaining why narrow multiquark hadrons are rare events, strongly coupled only to some particular channels and appearing only in some restricted mass regions. One of the predictions of our approach is the existence of several baryonium states below the N-antiN threshold

[en] We review the main developments of classical relativistic mechanics of particles interacting at a distance

[en] Within the context of Q.C.D. it is assumed that quarks and gluons have rather sharply defined masses in the confinement region. Then, the experimental data on structure functions give an upper limit to the light quark masses approximately equal to 100 MeV. Target mass corrections to scaling depend on further approximations

[en] Nuclear coherent pion photoproduction is studied. Pion rescattering and propagation effects inside nucleus and mesic exchange current effects are discussed. Influence of nuclear wave functions and Fermi motion is presented

[en] We compare recent data on p-p and p-n scattering at low and medium energy to the values produced by the Paris N-N potential, the agreement is very satisfactory

[en] The M.I.T. bag model of hadrons is reviewed and is applied in the determination of the K→antiK, D→antiD and B→antiB transition amplitudes needed in the evaluations of mass differences. Also application is made to multiquark states of q³ q^-3 out of which emerge states of 'hidden colour'

[en] The quantum relativistic field theory of hadron exchange has provided an excellent description of medium and long range forces (r>1/2μ^-1) for low energy nucleon-nucleon interactions (Esub(L)<350MeV). We demonstrate that the successful application of this approach can be extended to medium energies (350MeV< Esub(L)<1000MeV) after including the effect of the coupling of the nucleon-nucleon to nucleon-isobar channels