New and extended Monte Carlo tools for vector-boson-fusion double-Higgs production now support anomalous Higgs couplings, and show that NLO-plus-shower predictions approximate NNLO results while non-factorizable QCD corrections respond strongly to those couplings.
Non-factorizable virtual corrections to Higgs boson production in weak boson fusion beyond the eikonal approximation
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abstract
Non-factorizable virtual corrections to Higgs boson production in weak boson fusion at next-to-next-to-leading order in QCD were estimated in the eikonal approximation [1]. This approximation corresponds to the expansion of relevant amplitudes around the forward limit. In this paper we compute the leading power correction to the eikonal limit and show that it is proportional to first power of the Higgs boson transverse momentum or the Higgs boson mass over partonic center-of-mass energy. Moreover, this correction can be significantly enhanced by the rapidity of the Higgs boson. For realistic weak boson fusion cuts, the next-to-eikonal correction reduces the estimate of non-factorizable contributions to fiducial cross section by O(30) percent.
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Precision tools for the simulation of double-Higgs production via vector-boson fusion
New and extended Monte Carlo tools for vector-boson-fusion double-Higgs production now support anomalous Higgs couplings, and show that NLO-plus-shower predictions approximate NNLO results while non-factorizable QCD corrections respond strongly to those couplings.