arXiv:1702.00734·v2·High Energy Physics — Lattice

Lambda-Nucleon and Sigma-Nucleon interactions from lattice QCD with physical masses

Hidekatsu Nemura🇯🇵 · Sinya Aoki🇯🇵 · Takumi Doi🇯🇵 · Shinya Gongyo🇫🇷 · Tetsuo Hatsuda🇯🇵 · Yoichi Ikeda🇯🇵 · Takashi Inoue🇯🇵 · Takumi Iritani🇯🇵 · Noriyoshi Ishii🇯🇵 · Takaya Miyamoto🇯🇵 · Keiko Murano🇯🇵 · Kenji Sasaki🇯🇵

We present our recent study on baryon-baryon ( $B B$ ) interactions from lattice QCD with almost physical quark masses corresponding to $(m_{π}, m_{K}) \approx (146, 525)$ MeV and large volume $(L a)^{4} = (96 a)^{4} \approx$ (8.1 fm) $^{4}$ . In order to perform a comprehensive study of $B B$ interactions based on lattice QCD calculation with almost physical masses and to make better use of such large scale computer resources, a large number of $B B$ interactions from $N N$ to $ΞΞ$ 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 $^{1} S_{0}$ and $^{3} S_{1} -^{3} D_{1}$ channels are presented for $Λ N$ , $Σ N$ (both the isospin $I = 1/2, 3/2$ ) and their coupled-channel systems.

Comments: Talk presented at the 34th annual International Symposium on Lattice Field Theory (LATTICE 2016), 24-30 July 2016, University of Southampton, UK, 7 pages, 13 figures