Cutoff effects on lattice nuclear forces

Understand

We present a lattice QCD study for the cutoff effects on nuclear forces.

• Two-nucleon forces are determined from Nambu-Bethe-Salpeter (NBS) wave functions using the HAL QCD method.
• Lattice QCD simulations are performed employing N_f = 2 clover fermion configurations at three lattice spacings of a = 0.108, 0.156, 0.215 fm on a fixed physical volume of L^3 x T = (2.5 fm)^3 x 5 fm with a large quark mass corresponding to m_\pi = 1.1 GeV.
• We observe that while the discretization artifact appears at the short range part of potentials, it is suppressed at the long distance region.