Deformations of Toric Singularities and Fractional Branes

Details Deformations of Toric Singularities and Fractional Branes Deformations of Toric Singularities and Fractional Branes

2006-03-31

arxiv.org/abs/hep-th/0603253v2

JHEP0610:080,2006

Physics

High Energy Physics

High Energy Physics - Theory

40 pages, 23 figures; typos corrected

Scientific paper

10.1088/1126-6708/2006/10/080

Fractional branes added to a large stack of D3-branes at the singularity of a Calabi-Yau cone modify the quiver gauge theory breaking conformal invariance and leading to different kinds of IR behaviors. For toric singularities admitting complex deformations we propose a simple method that allows to compute the anomaly free rank distributions in the gauge theory corresponding to the fractional deformation branes. This algorithm fits Altmann's rule of decomposition of the toric diagram into a Minkowski sum of polytopes. More generally we suggest how different IR behaviors triggered by fractional branes can be classified by looking at suitable weights associated with the external legs of the (p,q) web. We check the proposal on many examples and match in some interesting cases the moduli space of the gauge theory with the deformed geometry.

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