Hadronic vacuum polarization contribution to a µ from full lattice QCD
Hadronic vacuum polarization contribution to a µ from full lattice QCD
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全晶格 QCD 强子真空极化对 µ 的贡献
DOI：
10.1103/physrevd.96.034516
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发表时间：
2017
影响因子：
5
通讯作者：
Chakraborty B
中科院分区：
文献类型：
--
作者：
Chakraborty B
我们首次使用全晶格 QCD 并首次包含具有物理质量的夸克，从强子真空极化图确定了 μ 子反常磁矩的贡献。我们使用胶子场配置，包括海洋中的夸克，具有多个晶格间距值、多个质量和多个体积，这使我们能够对有限体积效应进行分析。我们获得了一个结果，其中第一个误差来自晶格计算，第二个误差包括来自缺失 QED 和同位旋断裂效应以及来自夸克线断开图的系统误差。我们的结果意味着实验测定与标准模型之间存在差异。
We determine the contribution to the anomalous magnetic moment of the muon from thehadronic vacuum polarization diagram using full lattice QCD and includingquarks with physical masses for the first time. We use gluon field configurations that include,,andquarks in the sea at multiple values of the lattice spacing, multiplemasses and multiple volumes that allow us to include an analysis of finite-volume effects. We obtain a result forof, where the first error is from the lattice calculation and the second includes systematic errors from missing QED and isospin-breaking effects and from quark-line disconnected diagrams. Our result implies a discrepancy between the experimental determination ofand the Standard Model of.