FeynCalc 10.2 and FeynHelpers 2: Multiloop calculations streamlined

TL;DR

The paper introduces updated versions of FeynCalc and FeynHelpers that enhance multiloop Feynman diagram calculations by adding new features like program interfacing, parallel processing, and handling special tensor integrals.

Contribution

It provides new versions of FeynCalc and FeynHelpers with improved capabilities for multiloop calculations, including program interfacing, parallelization, and tensor integral handling.

Findings

Enhanced multiloop calculation efficiency

New program interfaces for FeynCalc and FeynHelpers

Support for tensor integrals with zero Gram determinants

Abstract

We present new versions of the Mathematica package FeynCalc and the FeynHelpers add-on that represent an important contribution to the collection of public codes for semi-automatic evaluation of multiloop Feynman diagrams. FeynHelpers enables interfacing between FeynCalc and selected programs routinely used in multiloop calculations such as QGRAF, FIRE, KIRA, FIESTA or pySecDec. In addition to that FeynCalc now supports parallelizing the execution of selected routines on multicore CPUs and can handle tensor integrals with zero Gram determinants where the traditional tensor reduction breaks down.