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

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.20.1633· OSTI ID:5786671

Nagels, M M; Rijken, T A; de Swart, J J

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 F/D ratios and the SU(3) parameters of the scalar-meson nonet. The description of the NN data is good (chi/sup 2//data = 2.17), and also of the ..lambda..p, ..sigma../sup +/p, and ..sigma../sup -/p data up to the pion production threshold. Very close to the ..sigma..N threshold we find a ..lambda..N resonance, which is dominantly in the /sup 3/D/sub 1/ wave. The ..lambda..p cross section is maximal just below the ..sigma../sup +/n threshold at E = 2128.918 MeV, in agreement with the experimental results of ..lambda..p final-state interactions. The poles belonging to the ..lambda..p resonance are located on the second Riemann sheet at E = 2131.77 +- i 2.39 MeV.

• Research Organization: Institute for Theoretical Physics, University of Nijmegen, Nijmegen, The Netherlands
• OSTI ID: 5786671
• Journal Information: Phys. Rev., D; (United States), Vol. 20:7
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
OBE MODEL
BOUND STATE
COUPLING CONSTANTS
CROSS SECTIONS
HAMILTONIANS
HARD-CORE POTENTIAL
PARTICLE PRODUCTION
PIONS
PSEUDOSCALAR MESONS
QUARKS
SCALAR MESONS
SU-3 GROUPS
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VECTOR MESONS
BOSON-EXCHANGE MODELS
BOSONS
ELEMENTARY PARTICLES
ENERGY
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LIE GROUPS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MESON RESONANCES
MESONS
NUCLEAR POTENTIAL
PARTICLE INTERACTIONS
PARTICLE MODELS
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POSTULATED PARTICLES
POTENTIALS
QUANTUM OPERATORS
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SYMMETRY GROUPS
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