Nucleon-nucleon potentials with and without. delta. (1232) degrees of freedom

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.1207· OSTI ID:6811189

Wiringa, R B; Smith, R A; Ainsworth, T L

We present two new nucleon-nucleon (NN) potentials: a v/sub 14/ model that is a conventional NN potential and a v/sub 28/ model with explicit ..delta..(1232) degrees of freedom. The v/sub 14/ model has 14 operator components describing NN channels, while the v/sub 28/ model has 14 additional operators, including 12 transition operators for all possible ..pi..N..delta.. and ..pi delta delta.. couplings and two central operators for N..delta.. and ..delta delta.. channels; the latter are constrained so that the v/sub 28/ model has no additional free parameters for data fitting. The two models give excellent and almost identical fits to deuteron properties and np scattering below 330 MeV. The v/sub 14/ and v/sub 28/ forms are convenient for nuclear structure calculations; when many-body cluster contributions are evaluated the v/sub 28/ model will automatically include much of the effect attributed to many-body forces in conventional models, while the v/sub 14/ model will provide a standard of comparison.

• Research Organization: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6811189
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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BARYON RESONANCES
BARYONS
BOSON-EXCHANGE MODELS
CHARGED PARTICLES
COUPLED CHANNEL THEORY
DELTA-1236 RESONANCES
DEUTERONS
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
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NUCLEAR MATTER
NUCLEAR STRUCTURE
NUCLEON-NUCLEON POTENTIAL
OBE MODEL
OPE MODEL
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE MODELS
PERIPHERAL MODELS
POTENTIALS
RESONANCE PARTICLES
SCATTERING
SCHROEDINGER EQUATION
WAVE EQUATIONS