Precise numerical evaluation of the two loop sunrise graph Master Integrals in the equal mass case

Abstract
We present a double precision routine in Fortran for the precise and fast numerical evaluation of the two Master Integrals (MIs) of the equal mass two-loop sunrise graph for arbitrary momentum transfer in d = 2 and d = 4 dimensions. The routine implements the accelerated power series expansions obtained by solving the corresponding differential equations for the MIs at their singular points. With a maximum of 22 terms for the worst case expansion a relative precision of better than a part in ...

Title of program: sunem
Catalogue Id: ADYC_v1_0

Nature of problem
Numerical evaluation of the two Master Integrals of the equal mass two-loop sunrise Feynman graph for arbitrary momentum transfer in d = 2 and d = 4 dimensions.

Versions of this program held in the CPC repository in Mendeley Data
ADYC_v1_0; sunem; 10.1016/j.cpc.2006.05.005

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)