Towards Lattice QCD Baryon Forces at the Physical Point: First Results

Abstract

Lattice QCD calculations of baryon forces are performed for the first time with (almost) physical quark masses. N f = 2 + 1 dynamical clover fermion gauge configurations are generated at the lattice spacing of a ≃ 0.085 fm on a (96a) 4 ≃ (8.2fm) 4 lattice with quark masses corresponding to (m π , m K ) ≃ (146, 525) MeV. Baryon forces are calculated using the time-dependent HAL QCD method. In this report, we study ΞΞ and NN systems both in 1 S 0 and 3 S 1 -3 D 1 channels, and the results for the central and tensor forces as well as phase shifts in the ΞΞ ( 1 S 0 ) channel are presented.