Abstract:
Ladder representations of $U(6,6)$ are used to classify hadrons. The physical part of the
space of the meson and baryon ladders is separated out on the basis of a single rule
(the group meaning of this rule has already been considered [5, 6]). The corresponding
vectors of meson and baryon states are obtained. For this purpose, use is made
of a complete set of commuting self-adjoint operators (introduced in [8]), which include
the hypercharge, the baryon number, the squares of the spin and the isospin, their
third projections, etc. The results are expressed in classification tables.