48,558 research outputs found
Quaternionic Mass Matrices and CP Symmetry
A viable formulation of gauge theory with extra generations in terms of
quaternionic fields is presented. For the theory to be acceptable, the number
of generations should be equal to or greater than 4. The quark-lepton mass
matrices are generalized into quaternionic matrices.It is concluded that
explicit CP violation automatically disappears in both strong- and
weak-interaction sectors.Comment: 10 pages, LaTe
Structure of S and T Parameters in Gauge-Higgs Unification
We investigate the divergence structure of one-loop corrections to S and T
parameteres in gauge-Higgs unification. We show that these parameters are
finite in five dimensions, but divergent in more than five dimensions.
Remarkably, a particular linear combination of S and T parameters becomes
finite in six dimension case, which is indicated from the operator analysis in
a model independent way.Comment: 7 pages, Talk given at 2006 International Workshop SCGT 06 "Origin of
Mass and Strong Coupling Gauge Theories" 21-24 November 2006, Nagoya, Japa
Effective Action Approach to Heavy Particle Contributions and Wilsonian Renormalization
We work in theories with both light and heavy particles. A method to obtain
an effective low energy action with respect to the light particle is presented.
Thanks to Wilsonian renormalization, we obtain effective actions with finite
number of local operators describing possible non-decoupling effects of heavy
particles. The validity of the method is first checked by explicit computation
of a specific observable, the - parameter, in the framework of effective
theory. Then we discuss a procedure to obtain the full effective action with
respect to light particles in a typical example of the system of (t, b)
doublet, gauge bosons and Higgs doublet, regarding only t quark as a heavy
particle.Comment: 13 pages, LaTeX209 file, using axodraw.st
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