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arXiv · 2411.02233

OPITeR: A program for tensor reduction of multi-loop Feynman Integrals

Jae Goode·Franz Herzog·Sam Teale
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Abstract

We present OPITeR, a FORM program for the reduction of multi-loop tensor Feynman integrals. The program can handle tensors, including spinor indices, with rank of up to 20 and can deal with up to 8 independent external momenta. The reduction occurs in $D$ dimensions compatible with conventional dimensional regularization. The program is able to manifest symmetries of the integrand in the tensor reduced form.

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Jae Goode, Franz Herzog, Sam Teale. 2024-11-04. OPITeR: A program for tensor reduction of multi-loop Feynman Integrals. https://doi.org/10.1016/j.cpc.2025.109606

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