An analytical expression for the three-loop form factors for ggH and γγH is derived for the contributions which involve massless quark loops. The result is expressed in terms of harmonic polylogarithms. It fully agrees with previously obtained kinematical expansions, and confirms a recent semi-numerical approximation which extends over the full kinematic range.
@article{arxiv.1907.06957,
title = {The light-fermion contribution to the exact Higgs-gluon form factor in QCD},
author = {Robert V. Harlander and Mario Prausa and Johann Usovitsch},
journal= {arXiv preprint arXiv:1907.06957},
year = {2020}
}
Comments
matches published version, including (forthcoming) erratum