146 research outputs found
Renormalization Group Approach to the SUSY Flavor Problem
Renormalization group approach to the SUSY flavor problem is elucidated.Comment: 9 pages, LaTe
Dihedral Flavor Symmetry from Dimensional Deconstruction
Extra dimension deconstructed on a closed chain has naturally the symmetry of
a regular polygon, the dihedral symmetry D_N. We assume that the fields are
irreducible representations of the binary dihedral group Q_2N, which is the
covering group of D_N. It is found that although the orbifold boundary
conditions break the dihedral invariance explicitly, the Q_2N symmetry appears
as an intact internal, global flavor symmetry at low energies. A concrete
predictive model based on Q_6N$ with an odd N is given.Comment: 10 pages, 4 figure
Scale and confinement phase transitions in scale invariant scalar gauge theory
We consider scalegenesis, spontaneous scale symmetry breaking, by the
scalar-bilinear condensation in scalar gauge theory. In an effective
field theory approach to the scalar-bilinear condensation at finite
temperature, we include the Polyakov loop to take into account the confinement
effect. The theory with and is investigated, and we find that in
all these cases the scale phase transition is a first-order phase transition.
We also calculate the latent heat at and slightly below the critical
temperature. Comparing the results with those obtained without the Polyakov
loop effect, we find that the Polyakov effect can considerably increase the
latent heat in some cases, which would mean a large increase in the energy
density of the gravitational waves background, if it were produced by the scale
phase transition.Comment: 20 pages, 15 figures, Version published in JHE
Extra dimensions prefer large
Assuming that the recent result obtained from the Monte Carlo simulations on
the nonperturbative existence of the pure SU(2) Yang-Mills theory in five
dimensions can be applied to a more general class of higher-dimensional gauge
theories, we derive the conditions imposed by the nontriviality requirement on
the theories. We find that the supersymmetric grand unified theories with extra
dimensions prefer a large value (\gsim 2) of of the minimal
supersymmetric standard model, in accord with today's possible observation of
the Higgs particle at LEP2.Comment: 26 pages, TeX, 7 figure
Suppressing FCNC and CP-Violating Phases by Extra Dimensions
In extra dimensions the infrared attractive force of gauge interactions is
amplified. We find that this force can align in the infrared limit the
soft-supersymmetry breaking terms out of their anarchical disorder at a
fundamental scale, in such a way that flavor-changing neutral currents as well
as dangerous CP-violating phases are sufficiently suppressed at the unification
scale. The main assumption is that the matter and Higgs supermultiplets and the
flavor-dependent interactions such as Yukawa interactions are stuck at the
four-dimensional boundary. As a concrete example we consider the minimal model
based on SU(5) in six dimensions.Comment: 9 pages, 2 figure
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