We present predictions for the total cross section for the production of a charged Higgs boson in the intermediate-mass range (m(H)+/- similar to 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 -/+ b (b) over bar 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.
Accurate predictions for charged Higgs production : Closing the mH± ∼ mt window / C. Degrande, R. Frederix, V. Hirschi, M. Ubiali, M. Wiesemann, M. Zaro. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 772(2017), pp. 87-92. [10.1016/j.physletb.2017.06.037]
Accurate predictions for charged Higgs production : Closing the mH± ∼ mt window
M. Zaro
2017
Abstract
We present predictions for the total cross section for the production of a charged Higgs boson in the intermediate-mass range (m(H)+/- similar to 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 -/+ b (b) over bar 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.File | Dimensione | Formato | |
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