Lattice QCD approach to nuclear force
نویسندگان
چکیده
We present our updated results of the nucleon-nucleon potential in quenched lattice QCD simulations with the plaquette gauge action and the Wilson quark action on the 324(≃ (4.4fm)4) lattice. From the equal-time Bethe-Salpeter (BS) wave function, the NN potential is constructed through the Schrödinger-type equation. Resulting NN potential has all the qualitative features which phenomenological potentials commonly have: the repulsive core at short distance and the attractive well at medium and long distances. In the L → ∞ limit, our NN potential is guaranteed to reproduce the scattering length obtained from the Lüscher’s formula. The quark mass dependence of the NN potential is studied with mπ ∼ 380,529,731 MeV. The results suggest that both the repulsive core at short distance and the attractive well at medium distance are enhanced in the light quark mass region.
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