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arXiv 0709.1769math-phmath.MP
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费曼积分与差分方程

Feynman integrals and difference equations

S. Moch, C. Schneider

摘要:

本文利用Mellin空间中的差分方程计算单尺度问题的多圈Feynman积分。这些差分方程的调和和的解可以在差分域(所谓的Pi-Sigma域)上通过算法构造。我们测试的Mathematica包Sigma的实施例,从最近的高阶微扰计算量子色动力学。

英文摘要:

We report on the calculation of multi-loop Feynman integrals for single-scale problems by means of difference equations in Mellin space. The solution to these difference equations in terms of harmonic sums can be constructed algorithmically over difference fields, the so-called Pi-Sigma-fields. We test the implementaion of the Mathematica package Sigma on examples from recent higher order perturbative calculations in Quantum Chromodynamics.

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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