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Accurate predictions for charged Higgs production: Closing the m$_{H}$$\pm$ $\sim$ m$_{t}$ window

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Degrande, C 
Frederix, R 
Hirschi, V 
Wiesemann, M 


We present predictions for the total cross section for the production of a charged Higgs boson in the intermediate-mass range (m H ± ∼m t ) at the LHC, focusing on a type-II two-Higgs-doublet model. Results are obtained at next-to-leading order (NLO) accuracy in QCD perturbation theory, by studying the full process pp→H ± W ∓ bb¯ in the complex-(top)-mass scheme with massive bottom quarks. Compared to lowest-order predictions, NLO corrections have a sizeable impact: they increase the cross section by roughly 50% and reduce uncertainties due to scale variations by more than a factor of two. Our computation reliably interpolates between the low- and high-mass regime. Our results provide the first NLO prediction for charged Higgs production in the intermediate-mass range and therefore allow to have NLO accurate predictions in the full m H ± range. The extension of our results to different realisations of the two-Higgs-doublet model or to the supersymmetric case is also discussed.



charged Higgs, resonant diagrams, complex mass scheme, top quark, two-Higgs-doublet models

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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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Royal Society (DH150088)
The work of RF is supported by the Alexander von Humboldt Foundation, in the framework of the Sofja Kovaleskaja Award Project “Event Simulation for the Large Hadron Collider at High Precision”; the work of VH is supported by the Swiss National Science Foundation (SNF) with grant PBELP2 146525; the work of MW is supported by the Swiss National Science Foundation (SNF) under contract 200020-141360; and the work of MZ is supported by the European Union's Horizon 2020 research and innovation programme under the Marie Sklodovska-Curie grant agreement No. 660171 and in part by the ILP LABEX (ANR-10-LABX-63), in turn supported by French state funds managed by the ANR within the “Investissements d'Avenir” programme under reference ANR-11-IDEX-0004-02. MU is supported by a Royal Society Dorothy Hodgkin Research Fellowship and partially supported by the STFC grant ST/L000385/1.