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arXiv 0902.3768hep-lat
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用威尔逊圈计算规范理论中运行耦合常数的新方案

A new scheme for the running coupling constant in gauge theories using Wilson loops

Erek Bilgici, Antonino Flachi, Etsuko Itou, Masafumi Kurachi, C. -J David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Takeshi Yamazaki

摘要:

本文利用威尔逊圈提出了一般规范理论中运行耦合常数的一个新的重整化方案。重整化耦合常数由格点模拟中的Creutz比和相应的首阶微扰系数得到。后者可以通过采用zeta函数重算技术来计算。我们在淬火QCD中用格片规范作用对我们的方案进行了基准测试。耦合常数的运行是通过应用步进定标程序来确定的。使用几种方法,以提高统计精度,我们表明,运行耦合常数,可以确定在一个较宽的范围内的能量标度与相对较少的规范配置。

英文摘要:

We propose a new renormalization scheme of the running coupling constant in general gauge theories using the Wilson loops. The renormalized coupling constant is obtained from the Creutz ratio in lattice simulations and the corresponding perturbative coefficient at the leading order. The latter can be calculated by adopting the zeta-function resummation techniques. We perform a benchmark test of our scheme in quenched QCD with the plaquette gauge action. The running of the coupling constant is determined by applying the step-scaling procedure. Using several methods to improve the statistical accuracy, we show that the running coupling constant can be determined in a wide range of energy scales with relatively small number of gauge configurations.

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。

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