ﻻ يوجد ملخص باللغة العربية
Leptoproduction of nucleons into the backward hemisphere on nuclear targets is studied at relativistic subasymptotic energies and momenta. The relativistic internucleon potential is extracted from appropriate photoproduction data. Different production mechanisms are found to work together and interfere. Whenever rescattering is kinematically possible, it gives the bulk of the contribution, except at very high Q^2. Comparison with the existing data at E=2.4 GeV shows a reasonable agreement.
We estimate the energy losses in the case of deep-inelastic scattering on nuclear targets in terms of the effective change of the virtual photon energy. Our phenomenological results are in reasonable agreement with theoretical calculations. The diffe
We analyze the light meson leptoproduction within the handbag approach. We show that effects determined by the transversity Generalized Parton Distributions (GPDs), $H_T$ and $bar E_T$ are essential in the description of pseudoscalar and vector meson leptoproduction.
In this report the first results of cumulative particle production in the new kinematic region will be presented. The produced particles have momenta more than 2 GeV/c in the rest system of nuclear target. Such studies can significantly reduce the co
We study the perturbative and parametric stability of the QCD predictions for the Callan-Gross ratio $R(x,Q^2)=F_L/F_T$ and azimuthal $cos(2varphi)$ asymmetry, $A(x,Q^2)$, in heavy-quark leptoproduction. We review the available theoretical results fo
We study the Sivers asymmetry in inelastic $J/psi$ leptoproduction, $ep^uparrow to e+ J/psi+X$, within a transverse momentum dependent scheme, the so-called generalized parton model (GPM). The effects of final-state interactions are properly taken in