  The single-particle content of two-dimensional adjoint QCD remains elusive
due to the inability to distinguish single- from multi-particle states. To find
a criterion we compare several approximations to the theory. Starting from the
asymptotic theory (no pair production, only singular operators), we construct
sets of eigenfunctions in the lowest parton sectors of the theory. A
perturbative treatment of the omitted operators is performed. We find that
multi-particle states are absent if pair-production is disallowed and hints for
a double Regge trajectory of single-particle states. We discuss the structure
of the eigensystem of the theory, and present the reason for the fact that
bosonic single-particle states do not form multi-particle states.
