Supersymmetric Flavor Problem

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概要

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• I argue that one needs to consider a non-abelian discrete gauge symmetry as a flavor group to understand the flavor physics in supersymmetric context. The only assumptions in this argument are: (1) hidden sector supersymmetry breaking, (2) genericity, namely the existence of all operators allowed by symmetries without any particular relations among coupling constants, and (3) breakdown of global symmetries at Planck scale. An explicit example of a model of flavor is presented whose symmetry group is S_3. It will be shown that this flavor group allows us to understand the hierarchical structure of Yukawa matrices by a sequential symmetry breaking, while suppressing the flavor-changing neutral currents well below the experimental constraints. Extension of the model to the lepton sector is also discussed. The μ → eγ rate and proton decay rate are roughly on the edge of experimental constraints. Interestingly enough, the dominant proton decay mode is p → K^0e^+, which is distinctive from other models (π^0e^+ in non-SUSY GUT, K^+ν^^-_μ in SUSY GUT).

• 理論物理学刊行会の論文
• 1996-09-25

著者

• Murayama Hitoshi

  Department Of Physics University Of California : Theoretical Physics Group Lawrence Berkeley Laborat

• Murayama Hitoshi

  Department Of Physics Tohoku University

• MURAYAMA Hitoshi

  Department of Physics, University of California : Theoretical Physics Group, Lawrence Berkeley Laboratory

• MURAYAMA Hitoshi

  Department of Physics, Tohoku University

• Murayama Hitoshi

  Department of Engineering Science (Chemistry), Faculty of Engineering, Tohoku University

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