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arXiv 1610.07720hep-ph
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一般三圈真空费曼积分的计算

Evaluation of the general 3-loop vacuum Feynman integral

Stephen P. Martin, David G. Robertson

摘要:

本文讨论了具有任意质量的三圈真空积分的系统计算。使用分部积分,这种类型的一般积分可以代数地减少到几个基积分。我们定义了一组修改的有限基积分,特别方便表示重整化量。基础积分可以通过求解耦合的一阶微分方程来数值计算,使用仅依赖于一个质量尺度的分析已知的特殊情况作为边界条件。我们提供了必要的结果进行这一点,并介绍了一个公共软件包的形式,称为3VIL(3-loop真空积分库),它有效地计算任何指定的质量的基础积分的数值的实现。3VIL是用C编写的,可以从C、C++或FORTRAN代码链接。

英文摘要:

We discuss the systematic evaluation of 3-loop vacuum integrals with arbitrary masses. Using integration by parts, the general integral of this type can be reduced algebraically to a few basis integrals. We define a set of modified finite basis integrals that are particularly convenient for expressing renormalized quantities. The basis integrals can be computed numerically by solving coupled first-order differential equations, using as boundary conditions the analytically known special cases that depend on only one mass scale. We provide the results necessary to carry this out, and introduce an implementation in the form of a public software package called 3VIL (3-loop Vacuum Integral Library), which efficiently computes the numerical values of the basis integrals for any specified masses. 3VIL is written in C, and can be linked from C, C++, or FORTRAN code.

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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