# An instanton toolbox for F-theory model building

@article{Marsano2008AnIT, title={An instanton toolbox for F-theory model building}, author={Joseph G Marsano and Natalia Saulina and Sakura Sch{\"a}fer-Nameki}, journal={Journal of High Energy Physics}, year={2008}, volume={2010}, pages={1-21} }

Several dimensionful parameters needed for model building can be engineered in a certain class of SU(5) F-theory GUTs by adding extra singlet fields which are localized along pairwise intersections of D7-branes. The values of these parameters, however, depend on dynamics external to the GUT which causes the singlets to acquire suitable masses or expectation values. In this note, we demonstrate that D3-instantons which wrap one of the intersecting D7’s can provide precisely the needed dynamics…

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