Virtual corrections improve predictions for Higgs and Z boson production in particle physics, suggesting enhanced calculation methods.
We compute three-loop virtual corrections to the associated production of a Higgs boson with a Z boson in the large-mt limit. We describe in detail the application of the asymptotic expansion and provide, for all form factors, analytic results for the first three terms in the 1/mt expansion. We also provide numerical routines implemented in the C++ library ggxy.
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Davies et al. (2026) studied this question.
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