2008/12/31 by Florian Domingo, Ulrich Ellwanger · 3 citations
Physics and Astronomy · #Branching fraction #Cosmology and Gravitation Theories #Electron #Excited state #Higgs boson #Lepton #Minimal Supersymmetric Standard Model #Muon #Neutrino Physics Research #Nuclear physics #Pair production #Particle physics #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Physics #Production (economics) #Scalar (mathematics) #Singlet state #Superfield #Supersymmetry #hep-ph
paper · pdf · doi:10.1142/s0217732309030448
published in Modern Physics Letters A 24(08), 557-566 (World Scientific) · 10 pages, comments on the required total cross section added, to appear in MPLA
arxiv created 2009/01/22 · openalex publication_date 2009/03/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss a generalization of the minimal supersymmetric extension of the Standard Model in the form of three additional singlet superfields, which would explain the essential features of the CDF multi-muon events presented recently: a large production cross section of ~ 100 pb originates from the production of a CP-odd scalar A with a mass in the 70–80 GeV range and a large value of tan β ~ 40. The CP-odd scalar A decays dominantly into CP-odd and CP-even scalars a 1 and h 1 , which generate decay cascades h 1 → 2h 2 → 4a 2 → 8τ, and a 1 → h 1 a 2 with h 1 decaying as above. The decay a 2 → τ + τ - is slow, leading to a lifetime of [Formula: see text]. The phenomenology of the model differs from similar scenarios presented before in that one of the two cascades leads to 10 instead of 8 τ-leptons, and additional production processes like associate A production with [Formula: see text] pairs are relevant.