We compute next-to-leading order virtual two-loop corrections to the process gg→ZZ in the low- and high-energy limits, considering the contributions with virtual top quarks. Analytic results for all 20 form factors are presented including expansion terms up to 1/mt12 and mt32. We use a Pad\'e approximation procedure to extend the radius of convergence of the high-energy expansion and apply this approach to the fini\ te virtual next-to-leading order corrections.
@article{arxiv.2002.05558,
title = {$gg\to ZZ$: analytic two-loop results for the low- and high-energy regions},
author = {Joshua Davies and Go Mishima and Matthias Steinhauser and David Wellmann},
journal= {arXiv preprint arXiv:2002.05558},
year = {2020}
}