Accurate predictions for charged Higgs production : Closing the m_H^± ∼m_t window

Summary, in English

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.

• Author: Céline Degrande; Rikkert Frederix; Valentin Hirschi; Maria Ubiali; Marius Wiesemann; Marco Zaro
• Publishing year: 2017-09-10
• Language: English
• Pages: 87-92
• Publication/Series: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 772
• Links: http://dx.doi.org/10.1016/j.physletb.2017.06.037
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Keywords: Charged Higgs; Complex mass scheme; Resonant diagrams; Top quark; Two-Higgs-doublet models
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693