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Higher order corrections in perturbative quantum field theory are requiredfor precise theoretical analysis to investigate new physics beyond the StandardModel. This indicates that we need to evaluate Feynman loop diagram withmulti-loop integral which may require multi-precision calculation. We developeda dedicated accelerator system for multi-precision calculation (GRAPE9-MPX). Wepresent performance results of our system for the case of Feynman two-loop boxand three-loop selfenergy diagrams with multi-precision.

A development of an accelerator board dedicated for multi-precision arithmetic operations and its application to Feynman loop integrals