论文标题
使用梯度流量的辐射真空极化
Hadronic vacuum polarization using gradient flow
论文作者
论文摘要
QCD电流相关器（包括运算符）的梯度流操作员产品扩展是通过NNLO计算的。这铺平了一种替代方法来有效地评估Hadronic真空极化函数的晶格评估。另外，得出了流动复合算子的流动时间演变方程。它们针对QCD的非平凡尺寸四操作员的明确形式是通过$α_S^3 $给出的。
The gradient-flow operator product expansion for QCD current correlators including operators up to mass dimension four is calculated through NNLO. This paves an alternative way for efficient lattice evaluations of hadronic vacuum polarization functions. In addition, flow-time evolution equations for flowed composite operators are derived. Their explicit form for the non-trivial dimension-four operators of QCD is given through order $α_s^3$.
