Classical nuclear theory deals with a many-body system of neutrons and protons interacting nonrelativistically through two-body potentials. It has, of course, long been realized that there must be corrections to this simple picture—for example, the meson exchange effects which preclude a simple interpretation of the magnetic moment of the deuteron in terms of d-state probability. Nevertheless, the availability of beams of pions, and the consequent ability to study the excitation of real isobars in nuclei, has been critical in the realization that for many problems one must develop a theoretical model which explicitly includes pion and isobar degrees of freedom (see, for example, the proceedings of recent topical conferences Cat+ 82, MT 80).

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Chiral Symmetry and the Bag Model: A New Starting Point for Nuclear Physics

https://cds.cern.ch/record/224237/files/CM-P00062481.pdf

The Nonrelativistic three-body problem for baryons

The authors investigate the influence of pionic corrections on multi-quark hadrons. After determining the bag parameters from ordinary baryons and mesons, they discuss the implications for six-quark configurations.

/pdf/pionic-corrections-and-multi-quark-bags-241y6u9606.pdf

G.E. Brown

Papers

The baryon masses and the chiral quark bag model