Numerical evaluation of the general massive 2-loop sunrise self-mass master integrals from differential equations

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

References in corpus (3)

• An Approach Toward the Numerical Evaluation of Multi-Loop Feynman Diagrams
• Calculation of master integrals by difference equations
• The Threshold Expansion of the 2-loop Sunrise Selfmass Master Amplitudes

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