Baryon-baryon scattering in a one-boson-exchange-potential approach. III. A nucleon-nucleon and hyperon-nucleon analysis including contributions of a nonet of scalar mesons
- 1 October 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 20 (7), 1633-1645
- https://doi.org/10.1103/physrevd.20.1633
Abstract
The and 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 the nonstrange-meson-nucleon couplings are determined. The simultaneous analysis determines the ratios and the SU(3) parameters of the scalar-meson nonet. The description of the data is good (), and also of the , , and data up to the pion production threshold. Very close to the threshold we find a resonance, which is dominantly in the wave. The cross section is maximal just below the threshold at MeV, in agreement with the experimental results of final state interactions. The poles belonging to the resonance are located on the second Riemann sheet at MeV.
Keywords
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