Separable potential analyses of coupledNN−NΔscattering

The apparent differences between two analyses of the ${}_{}{}^1{}_{}{}^{}D_2^{}{}_{}{}^{}$ and ${}_{}{}^3{}_{}{}^{}F_3^{}{}_{}{}^{}$ nucleon-nucleon amplitudes by VerWest and the present authors are resolved. In both analyses dynamical poles are present in the scattering amplitude. These poles are associated with fixed left hand singularities.