Stringy instanton effects in N=2 gauge theories
High Energy Physics - Theory
2015-03-17 v1
Abstract
We study the non-perturbative effects induced by stringy instantons on N=2 SU}(N) gauge theories in four dimensions, realized on fractional D3 branes in a C^3/Z_3 orientifold. The stringy instantons, corresponding to D(-1) branes that occupy a node of the orientifold quiver diagram where no D3 brane is present, have the right content of zero-modes to produce non-perturbative terms in the four-dimensional effective action. In the SU(2) theory these terms have the same structure for all instanton numbers and yield a series of non-perturbative corrections to the prepotential. We explicitly compute these corrections up to instanton number k=5 using localization methods.
Cite
@article{arxiv.1012.1122,
title = {Stringy instanton effects in N=2 gauge theories},
author = {Hossein Ghorbani and Daniele Musso and Alberto Lerda},
journal= {arXiv preprint arXiv:1012.1122},
year = {2015}
}
Comments
31 pages, 1 figure, PdfLaTeX