具有物理质量的格点量子色动力学中的λ-核子和Σ-核子相互作用
Lambda-Nucleon and Sigma-Nucleon interactions from lattice QCD with physical masses
摘要：
本文介绍了我们最近在格点量子色动力学中对重子-重子（$BB$）相互作用的研究，这些相互作用具有几乎物理夸克质量，相当于$(m_π,m_K)\approx(146,525)$ MeV和大体积$(La)^4=(96a)^4\approx$（8.1 fm）$^4$ .为了更好地利用大规模的计算机资源，在几乎物理质量的格点量子色动力学计算基础上对$BB$相互作用进行全面的研究，同时计算了从$NN$到$ΞΞ$的大量$BB$相互作用.本文利用HAL QCD方法研究了超子相互作用的奇异$S=-1$通道。简要介绍了耦合道HAL QCD方法。给出了$ΛN$、$ΣN$（均为同位旋$I=1/2, 3/2$）及其耦合通道系统的$^1S_0$和$^3S_1-^3D_1$通道的中心势和张量势的快照.
英文摘要：
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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