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arXiv · 1611.00795

Quark and gluon form factors to four loop order in QCD: the $N_f^3$ contributions

Andreas von Manteuffel·Robert M. Schabinger
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Abstract

We calculate the four-loop massless QCD corrections with three closed quark lines to quark and gluon form factors. We apply a novel integration by parts algorithm based on modular arithmetic and compute all relevant master integrals for arbitrary values of the space-time dimension. This is the first calculation of a gluon form factor at this perturbative order in QCD.

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Andreas von Manteuffel, Robert M. Schabinger. 2016-11-02. Quark and gluon form factors to four loop order in QCD: the $N_f^3$ contributions. https://doi.org/10.1103/physrevd.95.034030

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