The HAL QCD potential in the I = 1 ππ system with the ρ meson bound state
The HAL QCD potential in the I = 1 ππ system with the ρ meson bound state
复制标题
具有 ρ 介子束缚态的 I = 1 ππ 系统中的 HAL QCD 势
DOI：
10.1093/ptep/ptaa087
复制
发表时间：
2020
影响因子：
3.5
通讯作者：
Sasaki Kenji
中科院分区：
文献类型：
--
作者：
Akahoshi Yutaro;Aoki Sinya;Aoyama Tatsumi;Doi Takumi;Miyamoto Takaya;Sasaki Kenji
我们使用所有传播器的混合方法研究了 HAL QCD 势散射，其中传播器通过低本征模来近似，并随机估计剩余的高本征模部分。为了验证混合方法对包含夸克产生湮没贡献的系统（例如主题子）的适用性，我们计算了晶格间距fm和MeV的晶格上的味道规范配置的势，其中主题子表现为深度束缚态。虽然我们发现夸克产生湮灭贡献的朴素随机评估会导致极大的统计波动，但额外的降噪方法使我们能够获得足够精确的势，这显示出强大的吸引力。我们还确认，在与我们的计算相关的大系统误差范围内，从我们的势中获得的结合能 和 与现有的介子束缚态大致一致，还讨论了其可能的起源。
We investigate the HAL QCD potential inscattering using the hybrid method for all-to-all propagators, in which a propagator is approximated by low eigenmodes, and the remaining high-eigenmode part is stochastically estimated. To verify the applicability of the hybrid method to systems containing quark creationannihilation contributions such as themeson, we calculate thepotential with the-flavor gauge configurations on alattice with lattice spacingfm andMeV, in which themeson appears as a deeply bound state. While we find that the naive stochastic evaluations for quark creationannihilation contributions lead to extremely large statistical fluctuations, additional noise reduction methods enable us to obtain a sufficiently precise potential, which shows a strong attractive force. We also confirm that the binding energy andobtained from our potential are roughly consistent with an existingmeson bound state, within the large systematic error associated with our calculation, whose possible origin is also discussed.