Regge-Pole Model with Cuts Generated by Absorption for the Reactionπ+n→ωp

Abstract

The reaction ${\pi }^{+}n\to \omega p$ is analyzed in terms of a model based on the exchange of the $\rho$ Regge pole and the associated cuts generated by absorption. The data, in particular the absence of a dip in the differential cross section and the large positive values of the density matrix element ${\rho }_{00}$, can be well described by this model only if the amplitudes do not vanish at nonsense, wrong-signature points.