Lattice Calculation of Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment
Lattice Calculation of Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment
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DOI：
10.1103/physrevd.93.014503
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发表时间：
2015-10
影响因子：
5
通讯作者：
T. Blum;N. Christ;M. Hayakawa;T. Izubuchi;Luchang Jin;C. Lehner
中科院分区：
文献类型：
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作者：
T. Blum;N. Christ;M. Hayakawa;T. Izubuchi;Luchang Jin;C. Lehner
本文利用具有手征费米子的格点QCD计算了强子光-光散射对μ子反常磁矩的贡献中的夸克连接部分。在这里，我们报告了几个显着的算法改进，并证明其有效性，通过具体的计算显示减少统计误差超过一个数量级。这些计算中最现实的是使用RBC/UKQCD协作的323×64 Iwasaki+DSDR规范系综在（4.6 fm）3空间体积上使用近物理的171 MeV π介子质量进行的。
The quark-connected part of the hadronic light-by-light scattering contribution to the muon’s anomalous magnetic moment is computed using lattice QCD with chiral fermions. Here we report several significant algorithmic improvements and demonstrate their effectiveness through specific calculations which show a reduction in statistical errors by more than an order of magnitude. The most realistic of these calculations is performed with a near-physical 171 MeV pion mass on a (4.6 fm)3 spatial volume using the 323×64 Iwasaki+DSDR gauge ensemble of the RBC/UKQCD Collaboration.