Citation Link: https://doi.org/10.1007/jhep05(2023)168
Feynman integral reduction using Gröbner bases
Publication Type
Article
Subjects
Ansatz
Modulo
Basis (linear algebra)
Ideal (ethics)
Reduction (mathematics)
Feynman diagram
Pure mathematics
Algebra over a field
Physics
Feynman integral
Mathematics
Mathematical physics
Discrete mathematics
Geometry
Date Issued
2023
Abstract
We investigate the reduction of Feynman integrals to master integrals using Gröbner bases in a rational double-shift algebra Y in which the integration-by-parts (IBP) relations form a left ideal. The problem of reducing a given family of integrals to master integrals can then be solved once and for all by computing the Gröbner basis of the left ideal formed by the IBP relations. We demonstrate this explicitly for several examples. We introduce so-called first-order normal-form IBP relations which we obtain by reducing the shift operators in Y modulo the Gröbner basis of the left ideal of IBP relations. For more complicated cases, where the Gröbner basis is computationally expensive, we develop an ansatz based on linear algebra over a function field to obtain the normal-form IBP relations.
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