Effective Action Approach to Heavy Particle Contributions and Wilsonian Renormalization

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概要

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• We consider theories with both light and heavy particles. A method to obtain an effective low-energy action with respect to the light particle is presented. Using Wilsonian renormalization, we obtain effective actions with a 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 ρ-parameter, in the framework of the 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 consisting of a (t, b) doublet, gauge bosons and a Higgs doublet, regarding only the t quark as a heavy particle.

• 理論物理学刊行会の論文
• 2000-04-25

著者

• Lim C

  Department Of Physics Kobe University

• LIM C.S.

  Department of Physics, Kobe University

• TAGA Bungo

  Graduate School of Science and Technology, Kobe University

• Lim C.s.

  Department Of Physics Kobe University

• Taga Bungo

  Graduate School Of Science And Technology Kobe University

• Lim C.s.

  Department Fo Physics Kobe University

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