2009/04/30 by Simon de Visscher, Jean-Marc Gerard, Jean-Marc Gérard +3 · 38 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #CP violation #Higgs boson #Higgs sector #Invariant (physics) #Minimal model #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Scalar (mathematics) #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1088/1126-6708/2009/08/042
published in Journal of High Energy Physics 2009(08), 042 (Springer Nature) · 37 pages, 20 figures
openalex publication_date 2009/08/12 · arxiv created 2009/10/15 · arxiv updated 2010/12/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Two-Higgs-doublet models (2HDM) are simple extensions of the Standard Model (SM) where the scalar sector is enlarged by adding a weak doublet. As a result, the Higgs potential depends in general on several free parameters which have to be carefully chosen to give predictions consistent with the current precision data. We consider a 2HDM invariant under a twisted custodial symmetry and depending only on three extra parameters beyond the SM ones. This model naturally features an inverted mass spectrum with a light pseudoscalar state and a heavy SM-like Higgs boson. We thoroughly analyze direct and indirect constraints and present a few unconventional though promising signatures at the LHC.