Lambda-Nucleon and Sigma-Nucleon interactions from lattice QCD with physical masses
H. Nemura, S. Aoki, T. Doi, S. Gongyo, T. Hatsuda, Y. Ikeda, T. Inoue, T. Iritani, N. Ishii, T. Miyamoto, K. Murano, K. Sasaki
We present our recent study on baryon-baryon ($BB$) interactions from lattice QCD with almost physical quark masses corresponding to $(m_\pi,m_K)\approx(146,525)$ MeV and large volume $(La)^4=(96a)^4\approx$ (8.1 fm)$^4$. In order to make better use of large scale computer resources, a large number of $BB$ interactions from $NN$ to $\Xi\Xi$ are calculated simultaneously. In this report, we focus on the strangeness $S=-1$ channels of the hyperon interactions by means of HAL QCD method. The coupled-channel HAL QCD method is briefly outlined. The snapshots of central and tensor potentials in $^1S_0$ and $^3S_1-^3D_1$ channels are presented for $\Lambda N$,
$\Sigma N$ (both the isospin $I=1/2, 3/2$) and their coupled-channel systems.