Yasuhiro Daikoku

Mass Bound of the Lightest Neutral Higgs Scalar in the Extra

The upper mass bound of the lightest neutral Higgs scalar is studied in the

U(1)

\mu

Models

problem solvable extra U(1) models by using the analysis of the renormalization group equations. In order to restrict the parameter space we take account of a condition of the radiative symmetry breaking and some phenomenological constraints. We compare the bound obtained based on this restricted parameter space with the one of the next to the minimal supersymmetric standard model (NMSSM). Features of the scalar potential and renormalization group equations of the Yukawa couplings among Higgs chiral supermultiplets are rather different between them. They can reflect in this bound.

S 4 × Z 2 flavor symmetry in supersymmetric extra U ( 1 ) model

We propose a

Two Component Dark Matters in S4 x Z2 Flavor Symmetric Extra U(1)

{E}_{6}

Phenomenology of S4 flavor symmetric extra U(1) model

inspired supersymmetric model with a non-Abelian discrete flavor symmetry (

PeV scale right-handed neutrino dark matter in anS4flavor-symmetric extra U(1) model

{S}_{4}

Radiative Symmetry Breaking and Higgs Mass Bound in the NMSSM

group); that is,

Suppressing Proton Decay by Cancellation in S4 Flavor Symmetric Extra U(1) Model

SU(3{)}_{c}\ifmmode\times\else\texttimes\fi{}SU(2{)}_{W}\ifmmode\times\else\texttimes\fi{}U(1{)}_{Y}\ifmmode\times\else\texttimes\fi{}U(1{)}_{X}\ifmmode\times\else\texttimes\fi{}{S}_{4}\ifmmode\times\else\texttimes\fi{}{Z}_{2}

Cancellation Mechanism of FCNCs in

. In our scenario, the additional Abelian gauge symmetry,