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arXiv 1001.2887hep-ph
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无质量三环形状因子的解析结果

Analytic Results for Massless Three-Loop Form Factors

R. N. Lee, A. V. Smirnov, V. A. Smirnov

摘要:

我们精确地在d中计算对无质量三圈QCD形状因子有贡献的主积分。计算是基于一个组合的方法最近提出的作者之一(R.L.)与其他技术:扇区分解实现的FIESTA,梅林-巴恩斯表示的方法,和PSLQ算法。利用主积分的结果,我们得到了两个最复杂的主积分的ep展开式中两个缺失常数的解析表达式,并给出了完全解析形式的形状因子。

英文摘要:

We evaluate, exactly in d, the master integrals contributing to massless three-loop QCD form factors. The calculation is based on a combination of a method recently suggested by one of the authors (R.L.) with other techniques: sector decomposition implemented in FIESTA, the method of Mellin--Barnes representation, and the PSLQ algorithm. Using our results for the master integrals we obtain analytical expressions for two missing constants in the ep-expansion of the two most complicated master integrals and present the form factors in a completely analytic form.

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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