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arXiv 2301.08696hep-lathep-ph
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强子真空极化欧几里德窗的修正

An update of Euclidean windows of the hadronic vacuum polarization

T. Blum, P. A. Boyle, M. Bruno, D. Giusti, V. Gülpers, R. C. Hill, T. Izubuchi, Y. -C. Jang, L. Jin, C. Jung, A. Jüttner, C. Kelly, C. Lehner, N. Matsumoto, R. … 展开作者

T. Blum, P. A. Boyle, M. Bruno, D. Giusti, V. Gülpers, R. C. Hill, T. Izubuchi, Y. -C. Jang, L. Jin, C. Jung, A. Jüttner, C. Kelly, C. Lehner, N. Matsumoto, R. D. Mawhinney, A. S. Meyer, J. T. Tsang

摘要:

利用多重独立盲分析方法计算了强子真空极化的标准欧几里德窗口。我们改进了占主导地位的夸克连接轻夸克同位旋对称贡献的连续和无限体积外推,并从第一性原理出发,解决了海魅夸克和剩余手征对称性破缺的额外子领先系统效应。我们发现$a_μ^{\rm W} = 235.56(65)(50) \times 10^{-10}$与Colangelo等人最近发表的色散结果处于$3.8σ$张力中,$a_μ^{\rm W} = 229.4(1.4) \times 10^{-10}$,并与其他最近的晶格测定。我们还提供了标准短距离窗口的结果。这里报告的结果与我们在2022年g-2理论倡议爱丁堡研讨会上的演讲相比没有变化。

英文摘要:

We compute the standard Euclidean window of the hadronic vacuum polarization using multiple independent blinded analyses. We improve the continuum and infinite-volume extrapolations of the dominant quark-connected light-quark isospin-symmetric contribution and address additional sub-leading systematic effects from sea-charm quarks and residual chiral-symmetry breaking from first principles. We find $a_μ^{\rm W} = 235.56(65)(50) \times 10^{-10}$, which is in $3.8σ$ tension with the recently published dispersive result of Colangelo et al., $a_μ^{\rm W} = 229.4(1.4) \times 10^{-10}$, and in agreement with other recent lattice determinations. We also provide a result for the standard short-distance window. The results reported here are unchanged compared to our presentation at the Edinburgh workshop of the g-2 Theory Initiative in 2022.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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