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arXiv 1010.4674hep-lat
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威尔逊圈的甚高阶晶格微扰理论

Very high order lattice perturbation theory for Wilson loops

R. Horsley, G. Hotzel, E. -M. Ilgenfritz, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, A. Schiller

摘要:

本文利用数值随机微扰理论计算了纯元格理论和树级改进的Symanzik规范理论在不同晶格尺寸下的微扰威尔逊圈,直至环阶$n=20$.这使我们能够研究高阶微扰级数的行为。我们观察到微扰系数的行为作为循环顺序的函数的差异。直到$n=20$,我们没有看到经常假设的系数阶乘增长的证据。基于观察到的行为,我们在一个超几何函数模型中对这个序列求和。或者,我们估计一系列的提升微扰理论。从非微扰蒙特卡罗结果中减去平均元格的微扰级数,我们估计了胶子凝聚。

英文摘要:

We calculate perturbative Wilson loops of various sizes up to loop order $n=20$ at different lattice sizes for pure plaquette and tree-level improved Symanzik gauge theories using the technique of Numerical Stochastic Perturbation Theory. This allows us to investigate the behavior of the perturbative series at high orders. We observe differences in the behavior of perturbative coefficients as a function of the loop order. Up to $n=20$ we do not see evidence for the often assumed factorial growth of the coefficients. Based on the observed behavior we sum this series in a model with hypergeometric functions. Alternatively we estimate the series in boosted perturbation theory. Subtracting the estimated perturbative series for the average plaquette from the non-perturbative Monte Carlo result we estimate the gluon condensate.

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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