2011/12/19 by P. M. Ferreira, Rui Santos, Marc Sher +2 · 72 citations
Physics and Astronomy · #Boson #Electron #Form factor (electronics) #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Nuclear physics #Parameter space #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Physics beyond the Standard Model #Quantum mechanics #Standard Model (mathematical formulation) #Statistics #Two-Higgs-doublet model #hep-ph
paper · pdf · doi:10.1103/physrevd.85.077703
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 85(7) (American Physical Society) · Latex, 6 pages, 4 figures; v2 - added 2 references
arxiv created 2011/12/19 · openalex publication_date 2012/04/20 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the implications for two-Higgs-doublet models of the recent announcement at the LHC giving a tantalizing hint for a Higgs boson of mass 125 GeV decaying into two photons. We require that the experimental result be within a factor of 2 of the theoretical standard model prediction, and analyze the type I and type II models as well as the lepton-specific and flipped models, subject to this requirement. It is assumed that there is no new physics other than two Higgs doublets. In all of the models, we display the allowed region of parameter space taking the recent LHC announcement at face value, and we analyze the W+W^\ensuremath-, ZZ, bb, and \ensuremathτ+\ensuremathτ^\ensuremath- expectations in these allowed regions. Throughout the entire range of parameter space allowed by the \ensuremathγ\ensuremathγ constraint, the numbers of events for Higgs decays into WW, ZZ, and bb are not changed from the standard model by more than a factor of 2. In contrast, in the lepton-specific model, decays to \ensuremathτ+\ensuremathτ^\ensuremath- are very sensitive across the entire \ensuremathγ\ensuremathγ-allowed region.