ΛN and ΣN Interactions from Lattice QCD

We present our recent study on I > N and I N pound (isospin I = 3/2) interactions by measuring Nambu-Bethe-Salpeter wave functions on the Lattice QCD. The lattice QCD calculation is performed by using the N (f) = 2 + 1 gauge configurations generated by PACS-CS collaboration together with employing an improved method to obtain potentials in lattice QCD simulations. For the (1) S (0) channel, the central I N pound (I = 3/2) potential and the central I > N ((1) S (0)) potential are found to be very similar. For the spin triplet ((3) S (1)-(3) D (1)) channels, the central I > N((3) S (1)-(3) D (1)) potential is attractive while the central I N(I pound = 3/2, (3) S (1)-(3) D (1)) potentials is repulsive. Tensor potentials, on the other hand, are rather weak in both I > N and I N(I pound = 3/2) systems.