论文标题
从晶格QCD中对灵恩磁矩的领先施加贡献
Leading hadronic contribution to the muon magnetic moment from lattice QCD
论文作者
论文摘要
我们使用晶状体QCD计算了对MUON的异常磁矩$（g_μ-2）$的领先顺序HADRONIC真空极化（LO-HVP）。计算是用四种4-Stout夸大的交错夸克的口味，在物理夸克质量和六个值的晶格间距下降到0.064〜fm的情况。所有强大的同胞断裂和电磁效应都被解释为领先顺序。由于模拟的尺寸最高为11 〜fm，因此无限体积的限制受到了限制。我们对$（g_μ-2）$的LO-HVP贡献的结果的总不确定性为0.8 \％。与此贡献的分散方法的结果相比，我们的贡献大大降低了$（g_μ-2）$的标准模型预测与其测量之间的张力。
We compute the leading order hadronic vacuum polarization (LO-HVP) contribution to the anomalous magnetic moment of the muon, $(g_μ-2)$, using lattice QCD. Calculations are performed with four flavors of 4-stout-improved staggered quarks, at physical quark masses and at six values of the lattice spacing down to 0.064~fm. All strong isospin breaking and electromagnetic effects are accounted for to leading order. The infinite-volume limit is taken thanks to simulations performed in volumes of sizes up to 11~fm. Our result for the LO-HVP contribution to $(g_μ-2)$ has a total uncertainty of 0.8\%. Compared to the result of the dispersive approach for this contribution, ours significantly reduces the tension between the standard model prediction for $(g_μ-2)$ and its measurement.
