Nuclear Force from Lattice QCD

Details Nuclear Force from Lattice QCD Nuclear Force from Lattice QCD

2006-11-28

arxiv.org/abs/nucl-th/0611096v2

Phys.Rev.Lett.99:022001,2007

Physics

Nuclear Physics

Nuclear Theory

Physical Review Letters accepted version. 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.99.022001

Nucleon-nucleon (NN) potential is studied by lattice QCD simulations in the quenched approximation, using the plaquette gauge action and the Wilson quark action on a 32^4 (\simeq (4.4 fm)^4) lattice. A NN potential V_{NN}(r) is defined from the equal-time Bethe-Salpeter amplitude with a local interpolating operator for the nucleon. By studying the NN interaction in the ^1S_0 and ^3S_1 channels, we show that the central part of V_{NN}(r) has a strong repulsive core of a few hundred MeV at short distances (r \alt 0.5 fm) surrounded by an attractive well at medium and long distances. These features are consistent with the known phenomenological features of the nuclear force.

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