In this addendum to our paper entitled "W^+- H^-+ Associated Production at the Large Hadron Collider" [Phys. Rev. D 59, 015009 (1999)], we list analytic results for the helicity amplitudes of the partonic subprocess gg -> W^-H^+ induced by virtual quarks.
Cite
@article{arxiv.hep-ph/9909502,
title = {Quark-Loop Amplitudes for W^+- H^-+ Associated Hadroproduction},
author = {A. A. Barrientos Bendezu and B. A. Kniehl},
journal= {arXiv preprint arXiv:hep-ph/9909502},
year = {2009}
}