Baryon interactions from lattice QCD with physical quark masses – Nuclear forces and ΞΞ forces –

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

doi:10.1051/epjconf/201817505009

Proceedings

Open Access

EPJ Web of Conferences 175, 05009 (2018)
https://doi.org/10.1051/epjconf/201817505009

Baryon interactions from lattice QCD with physical quark masses – Nuclear forces and ΞΞ forces –

Takumi Doi¹^,2^*, Takumi Iritani¹, Sinya Aoki¹^,3^,4, Shinya Gongyo¹, Tetsuo Hatsuda¹^,2, Yoichi Ikeda¹^,5, Takashi Inoue¹^,6, Noriyoshi Ishii¹^,5, Takaya Miyamoto¹^,3, Hidekatsu Nemura¹^,5 and Kenji Sasaki¹^,3

¹ Theoretical Research Division, Nishina Center, RIKEN, Wako 351-0198, Japan
² iTHEMS Program and iTHES Research Group, 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 Research Center for Nuclear Physics (RCNP), Osaka University, Osaka 567-0047, Japan
⁶ Nihon University, College of Bioresource Sciences, Kanagawa 252-0880, Japan

^* Speaker, e-mail: doi@ribf.riken.jp

Published online: 26 March 2018

Abstract

We present the latest lattice QCD results for baryon interactions obtained at nearly physical quark masses. N_f = 2 + 1 nonperturbatively O(a)-improved Wilson quark action with stout smearing and Iwasaki gauge action are employed on the lattice of (96a)⁴ ≃(8.1fm)⁴ with a^-1 ≃2.3 GeV, where m_π ≃146 MeV and m_K ≃525 MeV. In this report, we study the two-nucleon systems and two-Ξ systems in ¹S₀ channel and ³S₁-³D₁ coupled channel, and extract central and tensor interactions by the HAL QCD method. We also present the results for the NΩ interaction in ⁵S₂ channel which is relevant to the NΩ pair-momentum correlation in heavy-ion collision experiments.

© The Authors, published by EDP Sciences, 2018

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