Institutional Repository

Browsing Research and Publications - Department of Physics & Astronomy by Subject "Unified theories and models of strong and electroweak interactions"

Browsing Research and Publications - Department of Physics & Astronomy by Subject "Unified theories and models of strong and electroweak interactions"

Sort by: Order: Results:

  • Discrimination of Supersymmetric Grand Unified Models in Gaugino Mediation 
    Okada, Nobuchika (2011-03-01)
    We consider supersymmetric grand unified theory (GUT) with the gaugino mediated supersymmetry breaking and investigate a possibility to discriminate different GUT models in terms of predicted sparticle mass spectra. Taking ...
  • Dynamical Doublet-Triplet Higgs Boson Mass Splitting 
    Okada, Nobuchika (2001-08-10)
    We propose a new mechanism toward the solution to the doublet-triplet Higgs mass splitting problem in the supersymmetric grand unified theory. Our model is based on the gauge group SU(5)⌄H × SU(5)⌄GUT, where SU(5)⌄H and ...
  • Higgs Inflation in Minimal Supersymmetric SU(5) Grand Unified Theory 
    Okada, Nobuchika (2011-12-22)
    The standard model Higgs boson with large nonminimal coupling to the gravitational curvature can drive cosmological inflation. We study this type of inflationary scenario in the context of supersymmetric grand unification ...
  • Lepton Flavor Violating Processes and Muon g−2 in the Minimal Supersymmetric SO(10) Model 
    Okada, Nobuchika (2003-08-26)
    In the recently proposed minimal supersymmetric SO(10) model, the neutrino Dirac Yukawa coupling matrix, together with all the other fermion mass matrices, is completely determined once free parameters in the model are ...
  • Minimal SUSY SO(10) and Yukawa Unification 
    Okada, Nobuchika (2013-05-23)
    The minimal supersymmetric (SUSY) SO(10) model, where only two Higgs multiplets {10 ⊕ 126} are utilized for Yukawa couplings with matter fields, can nicely fit the neutrino oscillation parameters as well as charged fermion ...
  • Natural Realizations of the Seesaw Mechanism in Miniwarped Minimal SO(10) 
    Okada, Nobuchika (2007-07-19)
    The minimal supersymmetric SO(10) grand unified theory (GUT) models with 10, 126, and 210 Higgs and only renormalizable couplings have been shown to provide a simple way to understand the neutrino mixings as well as the ...
  • Non-Minimal Inflation and SUSY GUTs 
    Okada, Nobuchika (2012-07-25)
    The Standard Model Higgs boson with the nonminimal coupling to the gravitational curvature can drive cosmological inflation. We study this type of inflationary scenario in the context of supergravity. We first point out ...
  • Particle Spectroscopy of Supersymmetric SO(10) with Nonuniversal Gaugino Masses 
    Okada, Nobuchika (2011-11-14)
    We examine the low scale particle spectroscopy of an SO(10) [or equivalently SU(5)] inspired supersymmetric model with nonuniversal gaugino masses. The model assumes minimal supergravity and contains the same number of ...
  • Perturbative SO(10) Grand Unification 
    Okada, Nobuchika (2005-05-05)
    We consider a phenomenologically viable SO(10) grand unification model of the unification scale M around 10₁₆  GeV which reproduces the minimal supersymmetric standard model at low energy and allows perturbative calculations ...
  • Simple 5D SO(10) GUT and Sparticle Masses 
    Okada, Nobuchika (2008-12-16)
    Simple supersymmetric SO(10) grand unified theory in five dimensions is proposed, in which the fifth dimension is compactified on the S¹/(Z₂ × Z₂′) orbifold with two inequivalent branes at the orbifold fixed points. In ...
  • A Simple SO(10) GUT in Five Dimensions 
    Okada, Nobuchika (2008-07-11)
    A simple supersymmetric SO(10) grand unified theory (GUT) in five dimensions is considered. The fifth dimension is compactified on the S¹/(Z₂ × Z₂') orbifold possessing two inequivalent fixed points. In our setup, all ...
  • Soft Probes of SU(5) Unification 
    Okada, Nobuchika (2009-05-22)
    We explore the sparticle and Higgs spectroscopy of an SU(5) inspired extension of the constrained minimal supersymmetric standard model. The universal soft parameter m₀ is replaced by m₅̅ and m₁₀, where m₅̅ and m₁₀ denote ...
  • Solving Problems of the 4D Minimal SO(10) Model in a Warped Extra Dimension 
    Okada, Nobuchika (2007-04-26)
    The minimal renormalizable supersymmetric SO(10) model, an SO(10) framework with only one 10 and one 1̅2̅6̅ Higgs multiplets in the Yukawa sector, is attractive because of its high predictive power for the neutrino oscillation ...

Search DSpace


Browse

My Account