Stringy Instantons and Quiver Gauge Theories

Details Stringy Instantons and Quiver Gauge Theories Stringy Instantons and Quiver Gauge Theories

2006-10-02

arxiv.org/abs/hep-th/0610003v3

JHEP 0705:024,2007

Physics

High Energy Physics

High Energy Physics - Theory

30 pages, 4 figures; v2: reference added; v3: confusing minor error in axion charges fixed (thanks to D. Green for pointing it

Scientific paper

10.1088/1126-6708/2007/05/024

We explore contributions to the 4D effective superpotential which arise from Euclidean D3 branes (``instantons'') that intersect space-filling D-branes. These effects can perturb the effective field theory on the space-filling branes by nontrivial operators composed of charged matter fields, changing the vacuum structure in a qualitative way in some examples. Our considerations are exemplified throughout by a careful study of a fractional brane configuration on a del Pezzo surface.

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