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arXiv 1306.3220hep-thgr-qc
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经典三圈二体图

Classical 3-loop 2-body diagrams

Barak Kol, Ruth Shir

摘要:

作为爱因斯坦引力学中两体问题研究的一部分,目前正采用有效场论(EFT)方法和其它方法计算后牛顿第四阶(4PN)两体有效作用量。具有3个(或4个)经典循环的图似乎是一个重大障碍。在本文中,我们开发了一种方法来计算这样的3-回路图,并通过一个具体的图来证明它。我们通过将体世界线收缩到量子场论中更常见的形式来简化经典图。评价的一个关键因素是Feynman积分的部分积分方法。

英文摘要:

As part of the study of the two-body problem in Einstein's gravity, the fourth post-Newtonian order (4PN) of the two-body effective action is being computed presently by both effective field theory (EFT) methods and others. Diagrams with 3 (or 4) classical loops appear to be a significant obstacle. In this paper we develop a method to compute such 3-loop diagrams and demonstrate it through a specific diagram. We reduce the classical diagrams through shrinking the body worldlines to a form more familiar in Quantum Field Theory. A key ingredient in the evaluation is the Integration By Parts method for Feynman integrals.

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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