Multiparticle production in lepton-nucleus collisions and relativistic string models

Nuclear attenuation of the leading (${\mathit{x}}_{\mathit{f}}$>0) hadron and the nuclear enhancement of target fragmentation (${\mathit{x}}_{\mathit{f}}$<0) hadrons in lepton-nucleus reactions are calculated via a (3+1)-dimensional string-parton model. A (1+1)-dimensional string model is used to investigate the dependence of rapidity distributions on the lepton energy loss, ν=10–100 GeV, the atomic number, A=1–200, the effective string tension, κ=0.5–2 GeV/fm, the string decay constant, ${\mathrm{\tau }}_0$=0.5–2 fm/c, and the string flip cross section, ${\mathrm{\sigma }}_{\mathit{l}\mathit{q}}$=0–30 mb. The (3+1)-dimensional string-parton model includes inelastic final state cascading of produced hadrons in the nucleus. We show how the A dependence of hadronic production in lepton-nucleus collisions, especially in the ${\mathit{x}}_{\mathit{f}}$<0 region, may be used to extract information on quark propagation and hadronization in nuclei.