Nuclear force and hyperon forces from Lattice QCD((anti-)symmetric LS force and odd parity interactions)

2017 Fiscal Year Final Research Report

• Project/Area Number: 25400244
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Osaka University (2014-2017); University of Tsukuba (2013)
• Principal Investigator: Ishii Noriyoshi 大阪大学, 核物理研究センター, 准教授 (40360490)
• Co-Investigator(Kenkyū-buntansha): 村野 啓子 大阪大学, 核物理研究センター, 協同研究員 (10610412)
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: 核力 / 格子QCD / 核子 / ハイペロン / ハドロン

Outline of Final Research Achievements

We have extended the calculation of the nuclear force in the negative parity sector with the momentum wall source to obtain the hyperon-nucleon and hyperon-hyperon potentials. By considering the idealized flavor SU(3) limit, we have obtained the lattice QCD results of hyperon potentials in the negative parity sector which include the symmetric LS and the anti-symmetric LS potentials. We found that Lambda N-Sigma N coupling plays an important role in understanding the cancellation between the symmetric and the anti-symmetric LS potentials in the Lambda N sector which is phenomenologically expected from the high precision spectroscopy of hyper nuclei. Besides, we have perforced several studies concerning the theoretical formulation of HAL QCD method by using an almost analytically treatable model, i.e., the Birse model.

Free Research Field

原子核物理理論