Baryon interactions from lattice QCD with physical masses — strangeness S = -1 sector —

Hidekatsu Nemura; Sinya Aoki; Takumi Doi; Shinya Gongyo; Tetsuo Hatsuda; Yoichi Ikeda; Takashi Inoue; Takumi Iritani; Noriyoshi Ishii; Takaya Miyamoto; Kenji Sasaki

doi:10.1051/epjconf/201817505030

Proceedings

Open Access

EPJ Web of Conferences 175, 05030 (2018)
https://doi.org/10.1051/epjconf/201817505030

Baryon interactions from lattice QCD with physical masses — strangeness S = -1 sector —

Hidekatsu Nemura¹^,2^*, Sinya Aoki²^,3^,4, Takumi Doi²^,5, Shinya Gongyo², Tetsuo Hatsuda²^,5, Yoichi Ikeda¹^,2, Takashi Inoue²^,6, Takumi Iritani², Noriyoshi Ishii¹^,2, Takaya Miyamoto²^,3 and Kenji Sasaki²^,3

¹ Research Centre for Nuclear Physics, Osaka University, Osaka, 567-0047, Japan
² Theoretical Research Division, Nishina Centre, RIKEN, Saitama, 351-0198, Japan
³ Centre for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, 606-8502, Japan
⁴ Centre for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
⁵ iTHEMS Program and iTHES Research Group, RIKEN, Saitama, 351-0198, Japan
⁶ Nihon University, College of Bioresource Sciences, Kanagawa 252-0880, Japan

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

Published online: 26 March 2018

Abstract

We present our recent results of baryon interactions with strangeness S = −1 based on Nambu-Bethe-Salpeter (NBS) correlation functions calculated fromlattice QCD with almost physical quark masses corresponding to (m_k,m_k) ≈ (146, 525) MeV and large volume (La)⁴ ≈ (96a)⁴ ≈ (8.1 fm)⁴. In order to perform a comprehensive study of baryon interactions, a large number of NBS correlation functions from NN to ΞΞ are calculated simultaneously by using large scale computer resources. In this contribution, we focus on the strangeness S = −1 channels of the hyperon interactions by means of HAL QCD method. Four sets of three potentials (the ³S₁ − ³ D₁ central, ³S₁ − ³ D₁ tensor, and the ¹S₀ central potentials) are presented for the ∑N − ∑N (the isospin I = 3/2) diagonal, the ∧N − ∧N diagonal, the ∧N → ∑N transition, and the ∑N − ∑N (I = 1/2) diagonal interactions. Scattering phase shifts for ∑N (I = 3/2) system are presented.

© The Authors, published by EDP Sciences, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).