Difference Equations in Massive Higher Order Calculations

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The calculation of massive 2--loop operator matrix elements, required for the higher order Wilson coefficients for heavy flavor production in deeply inelastic scattering, leads to new types of multiple infinite sums over harmonic sums and related functions, which depend on the Mellin parameter $N$. We report on the solution of these sums through higher order difference equations using the summation package {\tt Sigma}.
15 pages latex, Proceedings ACAT 2007

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Mathematical Physics, Mathematical Software, High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/210921

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.4659
 http://arxiv.org/abs/0707.4659
 PoSACAT2007:082,2007

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arXiv