Isobars, Transition Potentials and Short Range Repulsion in the Nucleon-Nucleon Interaction

1977
32 pages
Published in:
  • Nucl.Phys.A 278 (1977) 445-476
  • Published: 1977

Citations per year

19771989200120132023051015
Abstract: (Elsevier)
A chiral dynamic model of πN scattering, including N and Δ(1230) intermediate states, is constructed and shown to be in agreement with empirical amplitudes for NN̄ → ππ in the pseudophysical region. With this model we calculate the Δ(1230) contribution to the NN interaction and indicate the importance of explicitly including pion “crossed-box” processes which simplify the isospin structure of the resulting NN interaction. We show that inconsistent nonrelativitic approximations in the coupled-channels approach lead to a serious overestimate of pion box diagrams. We show that ρ-meson exchange together with intermediate isobars leads to a short-range repulsion which may be described as an effective ω-meson exchange with G ω 2 4π = 5–8 .
  • MODEL: ISOBAR
  • FIELD THEORY: CRITICAL PHENOMENA
  • NUCLEON NUCLEON: INTERACTION
  • INTERACTION: NUCLEON NUCLEON
  • PI NUCLEON: INTERACTION
  • INTERACTION: PI NUCLEON
  • DELTA(1236)
  • NUCLEON ANTINUCLEON: INTERACTION
  • INTERACTION: NUCLEON ANTINUCLEON
  • PI: FINAL STATE