Nuclear force in Lattice QCD

We perform the quenched lattice QCD analysis on the nuclear force (baryon-baryon interactions). We employ 203 ×24 lattice at β = 5.7 (a ≃ 0.19 fm) with the standard gauge action and the Wilson quark action with the hopping parameters κ = 0.1600,0.1625,0.1650, and generate about 200 gauge configurations. We measure the temporal correlators of the two-baryon system which consists of heavy-light-light quarks. We extract the inter-baryon force as a function of the relative distance r. We also evaluate the contribution to the nuclear force from each “Feynman diagram” such as the quark-exchange diagram individually, and single out the roles of Pauliblocking effects or quark exchanges in the inter-baryon interactions. PACS: 21.30.-x, 12.38.Gc