  A low mass single diffraction dissociation mode based on the quark-diquark
representation of hadron-nucleon interaction is proposed. The mass spectra of
nucleon-pion system are compared with experimental data and predictions of
other models. The hadron-nucleus single-diffraction cross-sections are
calculated in the framework of the Glauber-Gribov model for integral
cross-sections. The model predictions are compared with experimental data for
the different distributions of secondary particles produced in the
hadron-nucleus interactions in the momentum range 31-320 GeV/c.
