Stringy instantons and dualities

Details Stringy instantons and dualities Stringy instantons and dualities

2011-02-13

arxiv.org/abs/1102.2595v1

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Contribution to the proceedings of the XVIth European Workshop on String Theory, Madrid, Spain, June 14-18 2010

Scientific paper

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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