Nuclear force in Lattice QCD

الأصل · EN

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 Pauli-blocking effects or quark exchanges in the inter-baryon interactions.