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arXiv · 1211.5015

Gluon-induced Higgs-strahlung at next-to-leading order QCD

Lukas Altenkamp·Stefan Dittmaier·Robert V. Harlander·Heidi Rzehak·Tom J. E. Zirke
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Abstract

Gluon-induced contributions to the associated production of a Higgs and a Z-boson are calculated with NLO accuracy in QCD. They constitute a significant contribution to the cross section for this process. The perturbative correction factor (K-factor) is calculated in the limit of infinite top-quark and vanishing bottom-quark masses. The qualitative similarity of the results to the well-known ones for the gluon-fusion process $gg\to H$ allows to conclude that rescaling the LO prediction by this K-factor leads to a reliable NLO result and realistic error estimate due to missing higher-order perturbative effects. We consider the total inclusive cross section as well as a scenario with a boosted Higgs boson, where the Higgs boson's transverse momentum is restricted to values ptH>200GeV. In both cases, we find large correction factors $K\approx 2$ in most of the parameter space.

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Lukas Altenkamp, Stefan Dittmaier, Robert V. Harlander, Heidi Rzehak, Tom J. E. Zirke. 2012-11-21. Gluon-induced Higgs-strahlung at next-to-leading order QCD. https://doi.org/10.1007/jhep02(2013)078

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