Meson theory of nucleon-nucleon scattering up to 2 GeV
We show that it is possible to construct a meson-exchange Hamiltonian for N, ..pi.., ..delta.., and N( (1470 MeV) to describe NN scattering up to 2 GeV. The model consists of: (a) vertex interactions ..pi..Nbold-arrow-left-right..delta.. or N(, and ..pi delta..bold-arrow-left-right..delta.. or N( with which an isobar model is constructed to describe the P/sub 33/ and P/sub 11/ ..pi..N scattering phase shifts up to 1 GeV; (b) the transition interactions from NN to N..delta.., ..delta delta.., NN(, and N(N( are determined from one-pion and one-rho exchange mechanisms; (c) the NN..-->..NN interaction is directly derived from the Paris potential by using a momentum-dependent procedure to subtract the contributions from intermediate states involving ..delta.. or N(. The NN..-->..NN scattering equation is cast into the familiar coupled-channel form, but with a highly nonlocal isobar self-energy ..sigma..(E,p) calculated from the vertex interactions ..pi..Nbold-arrow-left-right..delta.. or N( in a dynamical three-body approach. Both the isospin T = 1 and T = 0 NN scattering phase shifts of Arndt et al. up to 1 GeV can be described to a very large extent by the model. The fits are, on the average, better than most of the previous NN calculations.
- Research Organization:
- Argonne National Laboratory, Argonne, Illinois 60439
- OSTI ID:
- 5170554
- Journal Information:
- Phys. Rev. C; (United States), Vol. 29:1
- Country of Publication:
- United States
- Language:
- English
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ISOBAR MODEL
NUCLEON-NUCLEON INTERACTIONS
BOSON-EXCHANGE MODELS
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PHASE SHIFT
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N RESONANCES
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QUANTUM OPERATORS
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645207* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions
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