BARYON-BARYON SCATTERING IN A ONE-BOSON-EXCHANGE-POTENTIAL APPROACH .3. NUCLEON-NUCLEON AND HYPERON-NUCLEON ANALYSIS INCLUDING CONTRIBUTIONS OF A NONET OF SCALAR MESONS

The NN and YN results are presented from a one-boson-exchange-potential model. It consists of local potentials due to exchanges of members of the pseudoscalar, vector, and scalar-meson nonets. SU(3) relations are assumed for the axial-vector couplings of the pseudoscalar mesons, for the electric and magnetic couplings of the vector mesons, for the direct couplings of the scalar mesons, and for the hard-core radii. In the fit to NN the nonstrange-meson- nucleon couplings are determined. The simultaneous YN analysis determines the FD ratios and the SU(3) parameters of the scalar-meson nonet. The description of the NN data is good (2data=2.17), and also of the p, +p, and -p data up to the pion production threshold. Very close to the N threshold we find a N resonance, which is dominantly in the D13 wave. The p cross section is maximal just below the +n threshold at E=2128.918 MeV, in agreement with the experimental results of p final state interactions. The poles belonging to the p resonance are located on the second Riemann sheet at E=2131.77 i 2.39 MeV. © 1979 The American Physical Society.