Realistic Yukawa Couplings through Instantons in Intersecting Brane Worlds

Details Realistic Yukawa Couplings through Instantons in Intersecting Brane Worlds Realistic Yukawa Couplings through Instantons in Intersecting Brane Worlds

2006-12-12

arxiv.org/abs/hep-th/0612110v3

JHEP0710:034,2007

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 1 figure. Published version

Scientific paper

10.1088/1126-6708/2007/10/034

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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