Abstract
πN finite-energy sum rules, together with charge-exchange differential cross sections and polarization data are used to test the predictions of the absorptive corrections to Regge ϱ exchange. An improved description is found, and a comparison is made of the modifications resulting from absorptive corrections with those from an additional ϱ′ Regge pole. An analysis of the cross-over and sense-nonsense zeroes in the amplitudes is presented, and the implications for factorization are discussed.
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