Exotic instanton counting and heterotic/type I' duality

Details Exotic instanton counting and heterotic/type I' duality Exotic instanton counting and heterotic/type I' duality

2009-05-28

arxiv.org/abs/0905.4586v1

JHEP 0907:092,2009

Physics

High Energy Physics

High Energy Physics - Theory

42 pages, 3 figures

Scientific paper

10.1088/1126-6708/2009/07/092

We compute the partition function for the exotic instanton system corresponding to D-instantons on D7 branes in Type I' theory. We exploit the BRST structure of the moduli action and its deformation by RR background to fully localize the integration. The resulting prepotential describes non-perturbative corrections to the quartic couplings of the gauge field F living on the D7's. The results match perfectly those obtained in the dual heterotic theory from a protected 1-loop computation, thus providing a non-trivial test of the duality itself.

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