Baryon-Baryon Interactions in a Quark Model and their Applications to Few-Baryon Systems

Strong interactions acting between baryons, the nucleon-nucleon (NN) interaction among others, play a basic role in building nuclei. Because of its importance enormous efforts, both experimental and theoretical, have hitherto been paid to understand the nature of the NN interaction. The quantum chromodynamics (QCD) [1] is nowadays believed to be a fundamental theory of the strong interaction. From this modern view, Yukawa's meson theory [2] for the nuclear force is regarded as an effective description of the interaction of the composite nucleons, governed by the strongly nonperturbative dynamics of quarks and gluons. A recent lattice QCD calculation [3] confirms this view by producing both the short-range repulsion and medium-range attraction for the three-quark plus three-quark (3q-3q) configuration. Further studies in this direction have to be made for a quantitative description of the nuclear force.

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