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arXiv · 1408.6836

Finite top-mass effects in gluon-induced Higgs production with a jet-veto at NNLO

Tobias Neumann·Marius Wiesemann
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Abstract

Effects from a finite top quark mass on the H+n-jet cross section through gluon fusion are studied for $n=0/n\ge 1$ at NNLO/NLO QCD. For this purpose, sub-leading terms in $1/m_t$ are calculated. We show that the asymptotic expansion of the jet-vetoed cross section at NNLO is very well behaved and that the heavy-top approximation is valid at the five permille level up to jet-veto cuts of 300 GeV. For the inclusive Higgs+jet rate, we introduce a matching procedure that allows for a reliable prediction of the top-mass effects using the expansion in $1/m_t$. The quality of the effective field theory to evaluate differential K-factors for the distribution of the hardest jet is found to be better than 1-2% as long as the transverse momentum of the jet is integrated out or remains below about 150 GeV.

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Tobias Neumann, Marius Wiesemann. 2014-08-28. Finite top-mass effects in gluon-induced Higgs production with a jet-veto at NNLO. https://doi.org/10.1007/jhep11(2014)150

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