Yukawa Coupling Structure in Intersecting D-brane Models
Abstract
The structure of Yukawa coupling matrices is investigated in type IIA T6/(Z2 x Z2) orientifold models with intersecting D-branes. Yukawa coupling matrices are difficult to be realistic in the conventional models in which the generation structure emerges by the multiple intersection of D-branes in the factorized T6 = T2 x T2 x T2. We study the new type of flavor structure, where Yukawa couplings are dynamically generated, and show this type of models lead to nontrivial structures of Yukawa coupling matrices, which can be realistic.
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