Abstract
Higher order corrections in perturbative quantum field theory are required
for precise theoretical analysis to investigate new physics beyond the Standard
Model. This indicates that we need to evaluate Feynman loop diagram with
multi-loop integral which may require multi-precision calculation. We developed
a dedicated accelerator system for multi-precision calculation (GRAPE9-MPX). We
present performance results of our system for the case of Feynman two-loop box
and three-loop selfenergy diagrams with multi-precision.
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