S-wave kaon-nucleon potentials with all-to-all propagators in the HAL QCD method
S-wave kaon-nucleon potentials with all-to-all propagators in the HAL QCD method
复制标题
HAL QCD 方法中具有全对全传播子的 S 波 kaon 核子势
DOI：
10.1093/ptep/ptaa118
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发表时间：
2020
影响因子：
3.5
通讯作者：
Aoki Sinya
中科院分区：
文献类型：
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作者：
Murakami Kotaro;Akahoshi Yutaro;Aoki Sinya
利用全对全夸克传播子技术，研究了晶格QCD中介子-核子的相互作用。我们使用（2+1）味规范配置，在晶格间隔fm和介子质量mev的晶格上，计算了时变HAL QCD方法导数展开中领先阶的s波k -核子势。我们对所有的传播子采用一端技巧，这允许我们在源和汇都放置零动量强子算子，并在源涂抹夸克算子。我们发现通道中的排斥力比。通过求解含有势的Schrödinger方程得到的相移定性地再现了实验相移的能量依赖性，并且具有与先前无全对全传播子的晶格QCD结果相似的行为。我们的研究表明，具有一端技巧的全对全夸克传播子技术对于在HAL QCD方法中研究介子-重子系统中的相互作用是有用的，因此我们将在未来的研究中将其应用于包含夸克-反夸克产生/湮灭过程的介子-重子系统。
Employing an all-to-all quark propagator technique, we investigate kaon–nucleon interactions in lattice QCD. We calculate the S-wave kaon–nucleon potentials at the leading order in the derivative expansion in the time-dependent HAL QCD method, using (2+1)-flavor gauge configurations onlattices with lattice spacingfm and pion massMeV. We take the one-end trick for all-to-all propagators, which allows us to put the zero-momentum hadron operators at both source and sink and to smear quark operators at the source. We find a stronger repulsive interaction in thechannel than in the. The phase shifts obtained by solving the Schrödinger equations with the potentials qualitatively reproduce the energy dependence of the experimental phase shifts, and have similar behavior to previous results from lattice QCD without all-to-all propagators. Our study demonstrates that the all-to-all quark propagator technique with the one-end trick is useful for studying interactions in meson–baryon systems in the HAL QCD method, so we will apply it to meson–baryon systems which contain quark–antiquark creation/annihilation processes in our future studies.