摘要
在非局域手征夸克模型框架下,计算了来源于全规范不变性动力学夸克圈图和中间赝标量介子和标量介子态圈图light-by-lightt散射过程对缪子反常磁矩αμ的强子修正.在夸克模型中,这些圈图对应于强子light-by-light散射过程对α_μ的最低价1/N_c的贡献.夸克圈图贡献的结果是α_μ^(HLbL,Loop)=(11.0±0.9)·10^(-10),总贡献结果是α_μ^(HLbL,Loop)=(16.8±1.2)·10^(-10).
The hadronic corrections to the muon anomalous magnetic moment αμ,due to the full gaugeinvariant set of diagrams with dynamical quark loop and intermediate pseudoscalar and scalar states lightby-light scattering insertions,are calculated in the framework of the nonlocal chiral quark model. These diagrams correspond to all hadronic light-by-light scattering contributions to α_μ in the leading order of the1 / N_c expansion in quark model. The result of the quark loop contribution is α_μ^(HLbL,Loop)=(11. 0 ± 0. 9) ·10^(-10),and the total result is α_μ^(HLbL,Loop)=(16.8 ± 1.2) ·10^(-10).
基金
Supported by by Russian Science Foundation(14-50-00080)
RFBR grant(15-02-03391)
