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arXiv 1105.6063math-phcs.SChep-phhep-thmath.AGmath.MP
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分圆多项式生成的调和和与多项式

Harmonic Sums and Polylogarithms Generated by Cyclotomic Polynomials

Jakob Ablinger, Johannes Blümlein, Carsten Schneider

摘要:

在可重正化量子场论的大规模高阶微扰计算中,Feynman积分的计算需要多重套调和和的延拓,而多重套调和和可以通过Poincaré迭代积分的Mellin变换(包括高阶分圆多项式的展开子)生成为实表示.我们导出了分圆调和多项式与调和和,并研究了它们的代数关系和结构关系。利用解析表示法将分圆调和和解析延拓到$N$的复值.我们还考虑了分圆调和多项式在自变量$x=1$上的特殊值,对于与色重zeta值有关的$N \rightarrow \infty$上的分圆调和和,基于stuffle代数和shuffle代数以及三个重宗量关系,导出了它们之间的各种关系.我们还考虑了与无限分圆调和和相关的单位根上的无限广义套调和和。导出了权重{ \sf w = 1,2}和到分圆{ \sf l = 20}的基表示。

英文摘要:

The computation of Feynman integrals in massive higher order perturbative calculations in renormalizable Quantum Field Theories requires extensions of multiply nested harmonic sums, which can be generated as real representations by Mellin transforms of Poincaré--iterated integrals including denominators of higher cyclotomic polynomials. We derive the cyclotomic harmonic polylogarithms and harmonic sums and study their algebraic and structural relations. The analytic continuation of cyclotomic harmonic sums to complex values of $N$ is performed using analytic representations. We also consider special values of the cyclotomic harmonic polylogarithms at argument $x=1$, resp., for the cyclotomic harmonic sums at $N \rightarrow \infty$, which are related to colored multiple zeta values, deriving various of their relations, based on the stuffle and shuffle algebras and three multiple argument relations. We also consider infinite generalized nested harmonic sums at roots of unity which are related to the infinite cyclotomic harmonic sums. Basis representations are derived for weight {\sf w = 1,2} sums up to cyclotomy {\sf l = 20}.

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