Fermion masses and mixings in a string inspired model.

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概要

• 論文の詳細を見る

• In the context of Calabi-Yau string models we explore the origin of characteristic pattern of quark-lepton masses and the CKM matrix. The discrete R-symmetry Z_K × Z_2 is introduced and the Z_2 is assigned to the R-parity. The gauge symmetry at the string scale, SU(6) × SU(2)_R, is broken into the standard model gauge group at a very large intermediate energy scale. At energies below the intermediate scale down-type quarks and also leptons are mixed with unobserved heavy states, respectively. On the other hand, there are no such mixings for up-type quarks. Due to the large mixings between light states and heavy ones we can derive phenomenologically viable fermion mass hierarchies and the CKM matrix. Mass spectra for intermediate-scale matter beyond the MSSM are also determined. Within this framework proton lifetime is long enough to be consistent with experimental data. As for the string scale unification of gauge couplings, however, consistent solutions are not yet found.

• 理論物理学刊行会の論文
• 1996-12-25

著者

• Haba Naoyuki

  Institute of Theoretical Physics, University of Tokushima

• Haba N

  Univ. Tokushima Tokushima Jpn

• Haba N

  Mie Univ. Tsu Jpn

• 松岡 武夫

  皇學館大

• 松田 正久

  愛知教育大

• MATSUDA Masahisa

  Department of Physics and Astronomy, Aichi University of Education

• HATTORI Chuichiro

  Science Division, General Education, Aichi Institute of Technology

• MATSUNAGA Mamoru

  Department of Physics Engineering, Mie University

• MATSUOKA Takeo

  Department of Physics, Nagoya University

• HADA Naoyuki

  Department of Physics, Nagoya University

• MATSUDA Masanori

  Devision of Materials Science, Faculty of Integrated Arts and Sciences Hiroshima University

• Matsuoka Takeo

  Department Of Physics Nagoya University

• Hattori C

  Science Division General Education Aichi Institute Of Technology

• Hattori Chuichiro

  Science Division General Education Aichi Institute Of Technology

• Matsuda Masahisa

  Department Of Physics Aichi University Of Education

• Haba Naoyuki

  Department Of Physics Nagoya University

• HABA Naoyuki

  Department of Physics, Nagoya University

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