Dynamical model for correlated two-pion exchange in the pion-nucleon interaction
- 1 March 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 51 (3) , 1374-1383
- https://doi.org/10.1103/physrevc.51.1374
Abstract
A 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.Keywords
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