Hadron interactions in lattice QCD

Progress on the potential method, recently proposed to investigate hadron interactions in lattice QCD, is reviewed. The strategy to extract the potential in lattice QCD is explained in detail. The method is applied to extract NNNN potentials, hyperon potentials and the meson–baryon potentials. A theoretical investigation is made to understand the origin of the repulsive core using the operator product expansion. Some recent extensions of the method are also discussed.

► The nuclear potential is calculated from the NBS wave function in lattice QCD.
► The method is extended to general hadronic interactions including hyperon potentials.
► In the flavor SU(3) limit, an evidence of a bound HH-dibaryon is observed.
► The origin of the repulsive core of the potentials is perturbatively analyzed in QCD.
► The three nuclear force is also investigated by the same method.