Hadronic vacuum polarization contribution to aμ from full lattice QCD

被引：61
|
作者：
Chakraborty, Bipasha [1 ]
Davies, C. T. H. [1 ]
de Oliveira, P. G. [1 ]
Koponen, J. [1 ]
Lepage, G. P. [2 ]
Van de Water, R. S. [3 ]
机构：
[1] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland
[2] Cornell Univ, Lab Elementary Particle Phys, Ithaca, NY 14853 USA
[3] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
来源：
PHYSICAL REVIEW D | 2017年 / 96卷 / 03期
基金：
英国科学技术设施理事会; 美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevD.96.034516
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We determine the contribution to the anomalous magnetic moment of the muon from the alpha(2)(QED) hadronic vacuum polarization diagram using full lattice QCD and including u/d quarks with physical masses for the first time. We use gluon field configurations that include u, d, s and c quarks in the sea at multiple values of the lattice spacing, multiple u/d masses and multiple volumes that allow us to include an analysis of finite-volume effects. We obtain a result for alpha(HVP,LO)(mu) of 667(6) (12) x 10(-10), 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 of alpha(mu) and the Standard Model of 3 sigma.
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页数：15
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