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

arXiv · 1702.00734

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

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Abstract

We present our recent study on baryon-baryon ($BB$) interactions from lattice QCD with almost physical quark masses corresponding to $(m_π,m_K)\approx(146,525)$ MeV and large volume $(La)^4=(96a)^4\approx$ (8.1 fm)$^4$. In order to perform a comprehensive study of $BB$ 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 $BB$ interactions from $NN$ 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 $^1S_0$ and $^3S_1-^3D_1$ channels are presented for $ΛN$, $ΣN$ (both the isospin $I=1/2, 3/2$) and their coupled-channel systems.

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Hidekatsu Nemura, Sinya Aoki, Takumi Doi, Shinya Gongyo, Tetsuo Hatsuda, Yoichi Ikeda, Takashi Inoue, Takumi Iritani, Noriyoshi Ishii, Takaya Miyamoto, Keiko Murano, Kenji Sasaki. 2017-03-10. Lambda-Nucleon and Sigma-Nucleon interactions from lattice QCD with physical masses. https://arxiv.org/abs/1702.00734

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