Regge analysis of the reactions π−p→ηn and K−p→Kon with ϱ and A2 degenerate trajectories

We report the results of a new analysi of the reactions π−p→ηn, K−p→Kon and K+n→Kop. Data for the two first reactions range from 1.7 to 18.2 GeV/c, and the analysis extends to t = −1.6 GeV2. It is found necessary to introduce four poles ϱ, ϱ′, A2 and A2′, and a cut associated with the A2 pole. The Regge model is used when evaluating the spin correction to the reaction K+d→KoppS in order to obtain the charge-exchange distribution K+n→Kop. The ϱ and A2 trajectories are practically degenerate, with a t = 0 intercept of 0.5. Polarizations expected from Regge models in K−p→Kon and K+n→Kop are discussed.