Origin of the short-range part of generalized two- and three-body nuclear force

Origin of the short-range baryon–baryon interactions is discussed from the quark substructure viewpoints of baryons. It is pointed out that the generalized nuclear force, recently obtained from the lattice QCD calculations, can be interpreted at short distances by the combinatory effects of the Pauli exclusion principle and the color–magnetic spin–spin interactions among the quarks. Classifications according to the spin-flavor SU(6) symmetry representations give us a general guidance on the features of the short-range interactions. The SU(6) analysis of the three-body baryon interactions reveals that the genuine three-body force is repulsive at short distances due to the quark antisymmetrization.