2009/10/10 by S. Nandi, G. Alverson, Pran Nath +1
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Electroweak interaction #Electroweak scale #Fermion #Gauge (firearms) #Hierarchy problem #Higgs boson #Lepton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #Symmetry breaking #Yukawa potential #hep-ph
paper · pdf · doi:10.1063/1.3327768
published as AIP Conf.Proc.1200:93-102,2010 · 10 pages, 2 figures; Plenary talk presented at the 17th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY09) at Northeastern University, Boston, MA, 5-10 June, 2009
arxiv created 2009/10/10 · openalex publication_date 2010/01/01 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this talk, I present a new framework to understand the long‐standing fermion mass hierarchy puzzle. We extend the Standard Model gauge symmetry by an extra local U(1)S symmetry, broken spontaneously at the electroweak scale. All the SM particles are singlet with respect to this U(1)S. We also introduce additional flavor symmetries, U(1)F′s, with flavon scalars Fi, as well as vectorlike quarks and leptons at the TeV scale. The flavon scalars have VEV in the TeV scale. Only the top quark has the usual dimension four Yukawa coupling. EW symmetry breaking to all other quarks and leptons are propagated through the messenger field, S through their interactions involving the heavy vector‐like fermions and S, as well as through their interactions involving the vector‐like fermions and Fi. In addition the explaining the hierarchy of the charged fermion masses and mixings, the model has several interesting predictions for Higgs decays, flavor changing neutral current processes in the top and the b quark decays, decays of the new singlet scalars to the new Z′ boson, as well as productions of the new vectorlike quarks. These predictions can be tested at the LHC.