Veneziano-Type Representation forπNAmplitudes

A Veneziano-type representation for $\pi N$ amplitudes is written in which the parity partners of the nucleon and the 3-3 resonance are absent. The difficulty in the earlier models of having $\Delta$ trajectories in $N$ channel (and vice versa) is avoided. The parameters in our model are determined from low-energy data; the prediction for intermediate-energy resonances and high-energy forward charge-exchange scattering are within a factor of 2 of the experimental values.