arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.5756hep-lat
收藏

格点量子色动力学中的微扰与非微扰重整化

Perturbative and Nonperturbative Renormalization in Lattice QCD

M. Göckeler, R. Horsley, Y. Nakamura, H. Perlt, D. Pleiter, P. E. L. Rakow, A. Schäfer, G. Schierholz, A. Schiller, H. Stüben, J. M. Zanotti

摘要:

我们研究了格点量子色动力学中复合算符的微扰和非微扰重整化,并将我们的研究限制在夸克场中的双线性算符(夸克-反夸克算符)。其中包括与强子结构函数矩的计算有关的算子。非微扰计算是基于蒙特卡罗模拟与两种口味的三叶草费米子,并利用的RIS-Southampton方法,也被称为RI-RISK计划。我们比较这种方法的结果与各种估计晶格微扰理论,特别是最近的两个循环计算。

英文摘要:

We investigate the perturbative and nonperturbative renormalization of composite operators in lattice QCD restricting ourselves to operators that are bilinear in the quark fields (quark-antiquark operators). These include operators which are relevant to the calculation of moments of hadronic structure functions. The nonperturbative computations are based on Monte Carlo simulations with two flavors of clover fermions and utilize the Rome-Southampton method also known as the RI-MOM scheme. We compare the results of this approach with various estimates from lattice perturbation theory, in particular with recent two-loop calculations.

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。

↑