$\frac{N}{D}$ analysis of $\rho \pi$ scattering in the $1^{+}$ channel in Bardakci-Halpern-type models

Amplitudes for $\rho \pi$ scattering obtained from lowest order graphs in two gauge models are unitarized in the $J^P=1^{+}$, isospin-1 channel using the $\frac{N}{D}$ formalism. There is no evidence for resonant behavior near the $A_1$ mass region.