The two-loop sunrise graph in two space-time dimensions with arbitrary masses in terms of elliptic dilogarithms

摘要

We present the two-loop sunrise integral with arbitrary non-zero masses intwo space-time dimensions in terms of elliptic dilogarithms. We find that thestructure of the result is as simple and elegant as in the equal mass case,only the arguments of the elliptic dilogarithms are modified. These argumentshave a nice geometric interpretation.