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arXiv · hep-th/0612110

Realistic Yukawa Couplings through Instantons in Intersecting Brane Worlds

Steven A. Abel·Mark D. Goodsell
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Abstract

The Yukawa couplings of the simpler models of D-branes on toroidal orientifolds suffer from the so-called ``rank one'' problem -- there is only a single non-zero mass and no mixing. We consider the one-loop contribution of E2-instantons to Yukawa couplings on intersecting D6-branes, and show that they can solve the rank one problem. In addition they have the potential to provide a geometric explanation for the hierarchies observed in the Yukawa coupling. In order to do this we provide the necessary quantities for instanton calculus in this class of background.

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Steven A. Abel, Mark D. Goodsell. 2007-10-17. Realistic Yukawa Couplings through Instantons in Intersecting Brane Worlds. https://doi.org/10.1088/1126-6708%2F2007%2F10%2F034

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