MISC

1991年6月25日

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

Progress of theoretical physics
  • BANDO Masako
  • ,
  • KUGO Taichiro
  • ,
  • SUEHIRO Kazuhiko

85
6
開始ページ
1299
終了ページ
1315
記述言語
英語
掲載種別
DOI
10.1143/PTP.85.1299
出版者・発行元
理論物理学刊行会

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...

リンク情報
DOI
https://doi.org/10.1143/PTP.85.1299
URL
http://ci.nii.ac.jp/naid/110001216260

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