A numerical test of differential equations for one- and two-loop sunrise diagrams using configuration space techniques

S. Groote; J. Körner; A. Pivovarov; A. Pivovarov

Paper

A numerical test of differential equations for one- and two-loop sunrise diagrams using configuration space techniques

Abstract

We use configuration space methods to write down one-dimensional integral representations for one- and two-loop sunrise diagrams (also called Bessel moments) which we use to numerically check on the correctness of the second order differential equations for one- and two-loop sunrise diagrams that have recently been discussed in the literature.