2004/10/31 by M. Moretti, Stefano Moretti, S. Moretti +3
Physics and Astronomy · #Biology #Context (archaeology) #Dark Matter and Cosmic Phenomena #Decoupling (probability) #Gauge (firearms) #Higgs boson #Higgs field #Higgs mechanism #Higgs sector #Large Hadron Collider #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Standard Model (mathematical formulation) #Vector boson #hep-ph
paper · pdf · doi:10.1088/1126-6708/2005/02/024
published as JHEP0502:024,2005 · 15 pages, 6 figures, 3 tables. Revised version, to appear in JHEP
arxiv created 2005/02/09 · openalex publication_date 2005/02/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A study of two-Higgs-doublet models (2HDM) in the decoupling limit reveals the existence of parameter configurations with a large triple-Higgs self-coupling as the only low-energy trace of the departure from a Standard Model (SM) Higgs sector. This observation encourages attempts to search for double Higgs production at the Large Hadron Collider (LHC) even in mass regions which have been shown to be very hard to probe in the context of SM-like Higgs self-couplings. In this document we consider the case of an Intermediate Mass Higgs (IMH) boson, with 120 GeV <= MH <= 140 GeV, produced in pairs via vector-vector fusion, Higgs-strahlung and associate production with heavy-quarks and decaying into b anti-b pairs. After a detailed signal-to-background analysis, we confirm that the observation of a Higgs-pair signal is very challenging in the framework of the SM, even at the LHC with upgraded luminosity. In contrast, we verify that the sensitivity is sufficient to detect departures from the SM which would escape detection in the measurements of the single-Higgs production channels.