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Perhaps the best summary is to collect the suggestions made through this review which outline the open problems, some of which are easier than others. One should be trying to:i)resolve the form factor ambiguities,ii)settle the importance of higher order terms in momentum space,iii)find a consistent framework for computing σ,σ and 3-σ, σ,σ,σ and 3-π contributions to the potential,iv)discuss quark-contributions,v)discard...
Recent experimental investigations of systems consisting of three nucleons or of a pion and two nucleons are commented on. Sensitivities with regard to the nucleon-nucleon and pion-nucleon interactions are discussed. Discrepancies between experimental observables and theoretical predictions do not require the inclusion of explicit three-body forces at the present level of precision.
We review the effect of three-nucleon interactions on nuclei, nuclear and neutron matter, and neutron stars. There are three pairs and only one triplet in the three-nucleon system, while there are six pairs and four triplets in the four-nucleon system. Such general considerations suggest that three-nucleon interactions may have a relatively larger contribution in systems that have a large number of...
A dozen years ago virtually nothing was known about three-nucleon forces. In the intervening years we have learned to solve routinely the trinucleon bound-state Faddeev equations for what amounts to the complete (model) nucleon-nucleon potential, and to include complicated three-nucleon forces as well. The art of constructing those forces has dramatically improved, and modern versions of these forces...
It can be demonstrated beyond any doubt that the traditional picture of the nucleus as a system of nucleons fails in detail. The same fact has not been established for the extended picture of the nucleus as a system of nucleons, isobars, and mesons. Indeed, the extended picture of the nucleus provides a unifying microscopic description of a wide range of nuclear phenomena at low and intermediate energies...
The binding energy of the trinucleon system can now be calculated for a model Hamiltonian with both two- and three-body forces to an accuracy of 10 keV. At least 34 channels must be used in the numerical calculations to achieve this accuracy. All models which use only two-body interactions yield binding energies which are below the experimental values. The addition of either the Tucson-Melbourne or...
The IS-IV separation of the 3-nucleon elastic form factors has required a careful re-analysis of the existing experimental data, followed by the functional representation (SOG) of their q2 behavior. A first result has been the extraction of a “consistent” set of experimental values for the RMS radii. The IS-IV separation itself Yields very clear conclusions for the magnetic part : evidence for a good...
Due to the results discussed in [J], it should be clear that we need to include the effects, at least, of the np- and ρρ-exchange three-nucleon potentials, in addition to the ππ-exchange three-nucleon potential that was taken into account in all quantities appearing in the present article. This will not change the values of
The present experimental situation in the nd scattering system is reviewed for the elastic scattering and for the breakup reaction channel. Faddeev calculations show the need of precise two-nucleon input in higher partial waves, especially p-waves for the description of spin-dependent observables. The experimental effort in the nd breakup reaction studies is to be guided by reliable Faddeev predictions...
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