A meson-exchange πN model up to scattering energies

✍ Scribed by Shin Nan Yang; Guan Yeu Chen; S.S. Kamalov

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 276 KB
• Volume: 790
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2007.03.151

✦ Synopsis

A meson-exchange πN model, previously constructed using three-dimensional reduction scheme of the Bethe-Salpeter equation for a model Lagrangian involving π, η, N , Δ, ρ, and σ fields, is extended to energies up to 2 GeV by including the ηN channel and all the four stars πN resonances up to the F -waves. The effects of other 2π channels are taken into account phenomenologically. The extended model gives an excellent fit to both πN phase shifts and inelasticity parameters in all channels up to the F -waves. However, some of the extracted resonance parameters differ substantially from the PDG values.