1995/04/26 by M. Hoffmann, J. W. Durso, J.W. Durso +4 · 41 citations
Physics and Astronomy · #Amplitude #Dispersion (optics) #Dispersion relation #Hyperon #Meson #Neutrino Physics Research #Particle physics theoretical and experimental studies #Pion #Quantum Chromodynamics and Particle Interactions #Scattering #Unitarity #nucl-th
paper · pdf · doi:10.1016/0375-9474(95)00320-z
published in Nuclear Physics A 593(3), 341-361 (Elsevier BV) · 24 pages, REVTEX, figures available from the authors
arxiv created 1995/04/26 · openalex publication_date 1995/10/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A dynamical model for S-- and P--wave correlated 2 π (and K K) exchange between a kaon and a nucleon is presented, starting from corresponding N N → K K amplitudes in the pseudophysical region, which have been constructed from nucleon, Δ--isobar and hyperon (Λ, Σ) exchange Born terms and a realistic meson exchange model of the ππ→ K K and K K → K K amplitude. The contribution in the s--channel is then obtained by performing a dispersion relation over the unitarity cut. In the ρ--channel, considerable ambiguities exist, depending on how the dispersion integral is performed. Our model, supplemented by short range interaction terms, is able to describe empirical K+ N data below pion production threshold in a satisfactory way.