Three-loop corrections to $gg\to ZH$ in the large top quark mass limit

Published 28 Nov 2025 in hep-ph | (2512.00156v1)

Abstract: We compute three-loop virtual corrections to the associated production of a Higgs boson with a $Z$ boson in the large-$m_t$ 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 $1/m_t$ expansion. We also provide numerical routines implemented in the C++ library ggxy.

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