Baryon interactions from lattice QCD with physical masses —S = −3 sector: Ξ∑ and Ξ∑-Λ∑—

¹ RCNP, Osaka university, 10-1 Mihoga-oka, Ibaraki-shi, Osaka, 567-0047, Japan
² Theoretical Research Division, Nishina Center, RIKEN, Wako 351-0198, Japan
³ Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
⁴ Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
⁵ iTHEMS Program and iTHES Research Group, RIKEN, Wako 351-0198, Japan
⁶ Nihon University, College of Bioresource Sciences, Kanagawa 252-0880, Japan

^* Speaker, e-mail: ishiin@rcnp.osaka-u.ac.jp

Published online: 26 March 2018

Abstract

Hyperon-nucleon and hyperon-hyperon interactions are important in studying the properties of hypernuclei in hypernuclear physics. However, unlike the nucleons which are quite stable, hyperons are unstable so that the direct scattering experiments are difficult, which leads to the large uncertainty in the phenomenological determination of hyperon potentials. In this talk, we use the gauge configurations generated at the (almost) physical point (m_π = 146 MeV) on a huge spatial volume (8:1fm)⁴ to present our latest result on the hyperon-hyperon potentials in S = −3 sector (Ξ∑ single channel and Ξ∑- ΞΛ; coupled channel) from the Nambu-Bethe-Salpeter wave functions based on the HAL QCD method with improved statistics.