论文标题
RI/SMOM方案中的双线性夸克操作员在三个循环中
Bilinear quark operators in the RI/SMOM scheme at three loops
论文作者
论文摘要
我们考虑双线性夸克运算符的矩阵元素$ \ bar单ψ$，$ \ bar单ψγ_μψ$以及$ \ \barψσ_{μν}ψ$在QCD扰动理论上以对称的子互动点上的QCD驱动理论。这使我们能够在$ \ overline {\ rm MS} $方案与正则不变性对称动量减法（RI/SMOM）方案之间获得转换因子。获得的结果可用于减少晶格QCD模拟确定夸克质量的错误。结果在Landau仪表中给出。
We consider the renormalization of the matrix elements of the bilinear quark operators $\barψψ$, $\barψγ_μψ$, and $\barψσ_{μν}ψ$ at next-to-next-to-next-to-leading order in QCD perturbation theory at the symmetric subtraction point. This allows us to obtain conversion factors between the $\overline{\rm MS}$ scheme and the regularization invariant symmetric momentum subtraction (RI/SMOM) scheme. The obtained results can be used to reduce the errors in determinations of quark masses from lattice QCD simulations. The results are given in Landau gauge.
