High energy electroproduction off complex nuclei

We investigate hadron attenuation in deep-inelastic lepton scattering off complex nuclei in the kinematic regime of the HERMES experiment. Our transport theoretical simulations reveal strong prehadronic final state interactions of the reaction products with the surrounding nuclear medium early after the initial photon-nucleon interaction has taken place. In this work we compare our model results with the measured hadron multiplicity ratios for a Kr target at HERMES and provide an extended discussion of the double-hadron attenuation recently observed at HERMES.