Journal of High Energy Physics (Mar 2018)
Reconstruction of top-quark mass effects in Higgs pair production and other gluon-fusion processes
Abstract
Abstract We propose a novel method for the treatment of top-quark mass effects in the production of H (∗), HH, HZ and ZZ final states in gluon fusion. We show that it is possible to reconstruct the full top-quark mass dependence of the virtual amplitudes from the corresponding large-m t expansion and the non-analytic part of the amplitude near the top-quark threshold ŝ = 4m t 2 with a Padé ansatz. The reliability of our method is clearly demonstrated by a comparison with the recent NLO result for Higgs pair production with full top-quark mass dependence.
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