Fermion Mass Hierarchy and New Physics at the TeV Scale

Journal Article · Wed Feb 10 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3327768· OSTI ID:21371647

Nandi, S ^[1]

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1. Department of Physics and Oklahoma Center for High Energy Physics, Oklahoma State University, Stillwater, OK 74078 (United States)

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){sub S} symmetry, broken spontaneously at the electroweak scale. All the SM particles are singlet with respect to this U(1){sub S}. We also introduce additional flavor symmetries, U(1){sub F}'s, with flavon scalars F{sub i}, 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 F{sub i}. 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.

• OSTI ID: 21371647
• Journal Information: AIP Conference Proceedings, Vol. 1200, Issue 1; Conference: SUSY09: 17. international conference on supersymmetry and the unification of fundamental interactions, Boston, MA (United States), 5-10 Jun 2009; Other Information: DOI: 10.1063/1.3327768; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

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