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arXiv 1204.4152hep-ph
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用SecDec 2.0计算任意运动学的多环积分

Numerical evaluation of multi-loop integrals for arbitrary kinematics with SecDec 2.0

Sophia Borowka, Jonathon Carter, Gudrun Heinrich

摘要:

我们提出的程序SecDec 2.0,其中包含各种新功能:首先,它允许数值计算的多回路积分没有限制的运动学。通过扇区分解将紫外线和红外线奇异点隔离,而阈值奇异点则通过复平面中积分轮廓的变形来处理。作为一个应用,我们提出了各种大规模的两圈四点图的数值结果。SecDec 2.0还包含用于计算更一般的参数积分的新功能,例如与相空间积分相关的功能。

英文摘要:

We present the program SecDec 2.0 which contains various new features: First, it allows the numerical evaluation of multi-loop integrals with no restriction on the kinematics. Dimensionally regulated ultraviolet and infrared singularities are isolated via sector decomposition, while threshold singularities are handled by a deformation of the integration contour in the complex plane. As an application we present numerical results for various massive two-loop four-point diagrams. SecDec 2.0 also contains new useful features for the calculation of more general parameter integrals, related e.g. to phase space 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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