Strong-Cut Reggeized Absorption Model for Backward Scattering

Abstract

The combined data for the high-energy backward reactions $\pi N\to N\pi$, $\pi N\to N\rho$, and $\gamma N\to N\pi$ are analyzed in terms of the strong-cut Reggeized absorption model proposed by Henyey, Kane, Pumplin, and Ross. Only the $N$ and $\Delta$ trajectories and the associated Regge cuts are necessary to describe the data, including the dip structure. The analysis lends strong support to the model, in particular to the feature that the Regge pole amplitudes do not have zeros at nonsense wrong-signature points.