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We review recent progress in studies of nuclear final-state interactions indeep inelastic scattering (DIS) off the lightest nuclei tagged by a recoilnucleon. These processes hold a lot of potential for resolving the outstandingissues related to the dynamics of hadronization in QCD. Within the minimal Fockcomponent framework, valid at large Bjorken $x$, the main features of thetheoretical approach based on the virtual nucleon approximation are elaborated.In this approach, the strong final-state interaction of the DIS products withthe nuclear fragments is described by an effective eikonal amplitude, whoseparameters can be extracted from the analysis of semi-inclusive DIS off thedeuteron target. The extraction of the $Q^2$ and $W$ mass dependences of theseparameters gives a new observable in studying the QCD structure of DIS finalstates. Another important feature of tagged DIS off the lightest nuclei is thepossibility of performing pole extrapolation with a high degree of accuracy.Such extrapolation allows an extraction of the neutron structure function in amodel independent way due to suppression of the final-state interaction in theon-shell limit of the struck nucleon propagator. We review the firstapplication of the pole extrapolation to recent experimental data. Finally, weoutline the extension of the framework to inclusive DIS, including a polarizeddeuteron target as well as its application to the tagged DIS reactions forfuture experiments at fixed target and collider energies.

Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei