Numerical evaluation of the general massive 2-loop sunrise self-mass master integrals from differential equations
arXiv:hep-ph/0203256 · doi:10.1016/S0550-3213(02)00315-2
Abstract
The system of 4 differential equations in the external invariant satisfied by the 4 master integrals of the general massive 2-loop sunrise self-mass diagram is solved by the Runge-Kutta method in the complex plane. The method, whose features are discussed in details, offers a reliable and robust approach to the direct and precise numerical evaluation of Feynman graph integrals.
1+21 pages, Latex, 5 ps-figures