2 research outputs found
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