ϱ+ϱModel of Pion-Nucleon Charge-Exchange Scattering and Polarization

Abstract
A ρ+ρ Regge-pole model in which the ρ is an α-type or nonconspiring trajectory is investigated. It is found to agree with present charge-exchange data and certain superconvergent sum rules. Present polarization measurements are not accurate enough to constrain all the Regge parameters, and a range of solutions emerges consistent with the data.