arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.10894hep-phhep-lat
收藏

三圈RI/SMOM方案中的双线性夸克算符

Bilinear quark operators in the RI/SMOM scheme at three loops

Bernd A. Kniehl, Oleg L. Veretin

摘要:

本文研究了QCD微扰理论中次领先阶双线性夸克算符$\barψψ$、$\barψγ_μψ$和$\barψσ_{μν}ψ$的矩阵元在对称减点处的重整化。这使我们能够获得之间的转换因子的$\overline{\rm MS}$计划和正则化不变的对称动量减法(RI/S)计划。所得结果可用于减小格点量子色动力学模拟中夸克质量测定的误差。结果以朗道规范给出。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑