In Part I, the common belief that fermions lying on lineartrajectories must have opposite-parity partners is shown to befalse. Reggeization of a sequence of positive-parity fermionresonance is carried out in the Van Hove model. As a consequenceof the absence of negative-parity states, the partial-wave amplitudesmust have a fixed cut in the J plane. This fixed cut, inconjunction with the moving Regge pole, provides a new parametrizationfor fermion-exchange reactions, which is in qualitativeagreement with the data.
In Part II, the spin structure of three particle vertices isdetermined from the quark model. Using these SU(6)W vertices inthe Van Hove model, we derive a Reggeized scattering amplitude. Inaddition to Regge poles there are necessarily fixed Regge cuts inboth fermion and boson exchange amplitudes. These fixed cuts aresimilar to those found in Part I, and may be viewed as a consequenceof the absence of parity doubled quarks. The magnitudes of the poleand cut terms in an entire class of SU(6) related reactions aredetermined by their magnitudes in a single reaction. As an examplewe explain the observed presence or absence of wrong-signaturenonsense dips in a class of reactions involving vector meson exchange.
