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arXiv · 1102.2595

Stringy instantons and dualities

Marialuisa Frau
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Abstract

We discuss non-perturbative corrections to the gauge kinetic functions in a four-dimensional N=2 gauge theory realized with a system of D7/D3-branes in a compactification of type I' theory on T_4/Z_2 x Z_2. The non-perturbative contributions arise when D(-1) branes, corresponding to stringy instantons, are added to the system; such contributions can be explicitly evaluated using localization techniques and precisely match the results predicted by the heterotic/type I' duality. This agreement represents a very non-trivial test of the stringy multi-instanton calculus.

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Marialuisa Frau. 2011-02-13. Stringy instantons and dualities. https://doi.org/10.1002/prop.201100022

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