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arXiv · 1804.00131

Direct Solution of Integration-by-Parts Systems

David A. Kosower
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Abstract

Systems of integration-by-parts identities play an important role in simplifying the higher-loop Feynman integrals that arise in quantum field theory. Solving these systems is equivalent to reducing integrals containing numerator products of irreducible invariants to a small set of master integrals. I present a new approach to solving these systems that finds direct reduction equations for numerator terms of a given Feynman integral. As a particular example of its power, I show how to obtain reduction equations for arbitrary powers of irreducible invariants, along with their solutions.

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David A. Kosower. 2018-03-31. Direct Solution of Integration-by-Parts Systems. https://doi.org/10.1103/physrevd.98.025008

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