Data-driven evaluations of Euclidean windows to scrutinize hadronic vacuum polarization
Data-driven evaluations of Euclidean windows to scrutinize hadronic vacuum polarization
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DOI：
10.1016/j.physletb.2022.137313
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发表时间：
2022-07-25
影响因子：
4.4
通讯作者：
Teubner, T.
中科院分区：
文献类型：
--
作者：
Colangelo, G.;El-Khadra, A. X.;Teubner, T.
在本文中，我们讨论了如何使用欧几里德时间窗口来隔离强子真空极化（HVP）对晶格 QCD 中 μ 子反常磁矩贡献的评估与 e(+)e(-)-> 强子截面数据之间潜在冲突的根源。我们提供了从 e(+)e(-)-> 强子数据评估的唯象比较数，用于晶格 QCD 中最常研究的窗口量，以及它们之间的相关性。我们讨论和评估了窗口参数的修改，这些修改可能有助于剖析 HVP 积分中张力的能量依赖性，并强调进一步的优化还需要精确了解晶格 QCD 计算中的完整协方差矩阵。 (C) 2022 作者。由 Elsevier B.V. 出版
In this paper, we discuss how windows in Euclidean time can be used to isolate the origin of potential conflicts between evaluations of the hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon in lattice QCD and from e(+)e(-)-> hadronscross-section data. We provide phenomenological comparison numbers evaluated from e(+)e(-)-> hadronsdata for the window quantities most commonly studied in lattice QCD, complete with the correlations among them. We discuss and evaluate modifications of window parameters that could be useful in dissecting the energy dependence of tensions in the HVP integral and emphasize that further optimizations require a precise knowledge of the full covariance matrix in lattice-QCD calculations as well. (C) 2022 The Author(s). Published by Elsevier B.V.