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Quark and gluon form factors to four loop order in QCD: the $N_f^3$ contributions (1611.00795v1)
Published 2 Nov 2016 in hep-ph and hep-th
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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