Schutz, C.Holinde, K.Speth, J.Pearce, B. C.Durso, J. W.2006-07-212006-07-211995Physical Review C, 1995; 51(3):1374-13830556-2813http://hdl.handle.net/2440/12732A microscopic model for the NN¯→ππ process is presented in the meson exchange framework, which in the pseudophysical region agrees with available quasiempirical information. The scalar (σ) and vector (ρ) piece of correlated two-pion exchange in the pion-nucleon interaction is then derived via dispersion integrals over the unitarity cut. Inherent ambiguities in the method and implications for the description of pion-nucleon scattering data are discussed.en© 1995 The American Physical SocietyJournal article001995191110.1103/PhysRevC.51.1374