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arXiv 0709.4092hep-ph
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多圈积分奇异性的求解

Resolution of singularities for multi-loop integrals

Christian Bogner, Stefan Weinzierl

摘要:

我们报告一个程序的数值计算发散多圈积分。该程序是基于迭代扇区分解。我们改进了Binoth和Heinrich的原算法,使程序能保证终止。该程序可用于数值计算由维数正则化调节的发散多圈积分的洛朗展开。该算法的符号步骤和数值步骤被合并到一个程序中。

英文摘要:

We report on a program for the numerical evaluation of divergent multi-loop integrals. The program is based on iterated sector decomposition. We improve the original algorithm of Binoth and Heinrich such that the program is guaranteed to terminate. The program can be used to compute numerically the Laurent expansion of divergent multi-loop integrals regulated by dimensional regularisation. The symbolic and the numerical steps of the algorithm are combined into one program.

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