Modular symmetry and non-Abelian discrete flavor symmetries in string compactification

  title={Modular symmetry and non-Abelian discrete flavor symmetries in string compactification},
  author={Tatsuo C. Kobayashi and Satoshi Nagamoto and Shintaro Takada and Shio Tamba and Takuya H. Tatsuishi},
  journal={Physical Review D},
We study the modular symmetry in magnetized D-brane models on $T^2$. Non-Abelian flavor symmetry $D_4$ in the model with magnetic flux $M=2$ (in a certain unit) is a subgroup of the modular symmetry. We also study the modular symmetry in heterotic orbifold models. The $T^2/Z_4$ orbifold model has the same modular symmetry as the magnetized brane model with $M=2$, and its flavor symmetry $D_4$ is a subgroup of the modular symmetry. 

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