Abstract
The next method in our list is based on integration by parts1 (IBP) [15] within dimensional regularization, i.e. property (2.38). The idea is to write down various equations (2.38) for integrals of derivatives with respect to loop momenta and use this set of relations between Feynman integrals in order to solve the reduction problem, i.e. to find out how a general Feynman integral of the given class can be expressed linearly in terms of some master integrals. In contrast to the evaluation of the master integrals, which is performed, at a sufficiently high level of complexity, in a Laurent expansion in ɛ, the reduction problem is solved at general d, and the expansion in ɛ does not provide simplifications here.
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© 2005 Springer-Verlag Berlin/Heidelberg
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Smirnov, V.A. (2005). IBP and Reduction to Master Integrals. In: Evaluating Feynman Integrals. Springer Tracts in Modern Physics, vol 211. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-44703-0_5
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DOI: https://doi.org/10.1007/978-3-540-44703-0_5
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