Abstract
The reaction ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}n$ is described quantitatively in a model involving a nonsense-choosing $\ensuremath{\rho}$ Regge pole modified by a mainly imaginary and spin-nonflip $\ensuremath{\rho}\ensuremath{\bigotimes}P$-type Regge cut. The details are determined with the aid of continuous-moment finite-energy sum rules, as well as scattering data. The Regge cut is found to have peaked $t$ dependence and approximately evasive behavior at $t=0$. This feature (in addition to its phase and spin coupling) disagrees strongly with predictions of conventional Regge-cut models. Some implications are mentioned.
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