Baryon interactions from lattice QCD with physical quark masses - Nuclear forces and ΞΞ forces

Abstract

We present the latest lattice QCD results for baryon interactions obtained at nearly physical quark masses. Nf = 2 + 1 nonperturbatively O(a)-improved Wilson quark action with stout smearing and Iwasaki gauge action are employed on the lattice of (96a)4 ? (8.1fm)4 with a-1 ? 2.3 GeV, where mπ ? 146 MeV and mK ? 525 MeV. In this report, we study the two-nucleon systems and two-Ξ systems in 1S0 channel and 3S1-3D1 coupled channel, and extract central and tensor interactions by the HAL QCD method. We also present the results for the N? interaction in 5S2 channel which is relevant to the N? pair-momentum correlation in heavy-ion collision experiments.