Effective Action Approach to Heavy Particle Contributions and Wilsonian Renormalization | Zendy

C. S. Lim | Zendy; Bungo Taga | Zendy

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Effective Action Approach to Heavy Particle Contributions and Wilsonian Renormalization

Author(s) -

C. S. Lim,

Bungo Taga

Publication year - 2000

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.103.795

Subject(s) - physics , renormalization , effective action , higgs boson , decoupling (probability) , observable , boson , particle physics , action (physics) , effective field theory , computation , quantum electrodynamics , theoretical physics , mathematical physics , quantum mechanics , control engineering , algorithm , computer science , engineering

We work in theories with both light and heavy particles. A method to obtainan effective low energy action with respect to the light particle is presented.Thanks to Wilsonian renormalization, we obtain effective actions with finitenumber of local operators describing possible non-decoupling effects of heavyparticles. The validity of the method is first checked by explicit computationof a specific observable, the $\rho$ - parameter, in the framework of effectivetheory. Then we discuss a procedure to obtain the full effective action withrespect 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 heavyparticle.Comment: 13 pages, LaTeX209 file, using axodraw.st

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