Researcher Profile and Settings

Affiliation

• Faculty of Science　Physics　Nonlinear Physics

Job Title

Lecturer

URL

• http://kaken.nii.ac.jp/d/r/60211976.ja.html

Research Areas

• Physics / Particle/Nuclear/Cosmic ray/Astro physics

Research Activities

MISC

• Critical Instability as an Origin of Large Isospin Breaking : Particles and Fields

  BANDO Masako, KUGO Taichiro, SUEHIRO Kazuhiko  Progress of theoretical physics  85-  (6)  1299  -1315  1991/06   [Not refereed] [Not invited]  

  Critical instability, as implied by the fine tuning of a 4-fermi coupling constant, is proposed as to the origin of the large isospin breaking in the third generation quark masses. We suggest two possible scenarios with new physics beginning at scales Λ〜20 TeV or Λ〜10^<16>-l0^<19> GeV. In the low Λ scenario, a fourth generation is necessary and its isodoublet is naturally predicted to be almost mass degenerate. The high Λ scenario is discussed in the framework of the E_6 GUT. We also give a formula describing how the critical value of the 4-fermi coupling is shifted by the presence of gener...

Educational Activities

Teaching Experience