The Massless Higher-loop Two-point Function

We introduce a new method for computing massless Feynman in-tegrals analytically in parametric form. An analysis of the method yields a criterion for a primitive Feynman graph G to evaluate to multiple zeta values. The criterion depends only on the topology of G, and can be checked algorithmically. As a corollary, we reprove the result, due to Bierenbaum… (More)