Stringy instantons at orbifold singularities
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In this article, the effects produced by D-brane instantons on the holomorphic quantities of a Dbrane gauge theory at an orbifold singularity were studied.Abstract:
We study the effects produced by D-brane instantons on the holomorphic quantities of a D-brane gauge theory at an orbifold singularity. These effects are not limited to reproducing the well known contributions of the gauge theory instantons but also generate extra terms in the superpotential or the prepotential. On these brane instantons there are some neutral fermionic zero-modes in addition to the ones expected from broken supertranslations. They are crucial in correctly reproducing effects which are dual to gauge theory instantons, but they may make some other interesting contributions vanish. We analyze how orientifold projections can remove these zero-modes and thus allow for new superpotential terms. These terms contribute to the dynamics of the effective gauge theory, for instance in the stabilization of runaway directions.read more
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d-Brane Instantons in Type II Orientifolds
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D-brane Instantons in Type II String Theory
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References
More filters
Journal ArticleDOI
De Sitter vacua in string theory
TL;DR: The metastable de Sitter vacua of type IIB string theory has been constructed in this article, which is a supersymmetric version of the ground state of the original ground state.
Journal ArticleDOI
Supergravity and a confining gauge theory: duality cascades and χSB-resolution of naked singularities
TL;DR: In this article, a non-singular pure-supergravity background dual to the field theory on all scales, with small curvature everywhere if the ‘t Hooft coupling gsM is large, was proposed.
Journal ArticleDOI
Bound states of strings and p-branes
TL;DR: In this paper, it was shown that the Type IIB superstring in ten dimensions has a family of soliton and bound state strings permuted by SL(2, Z ) and the space-time coordinates enter tantalizingly in the formalism as noncommuting matrices.
Journal ArticleDOI
Superconformal field theory on threebranes at a Calabi-Yau singularity
Igor R. Klebanov,Edward Witten +1 more
TL;DR: In this paper, it was shown that string theory on AdS5 × X5 can be described by a certain N = 1 supersymmetric gauge theory, which we describe in detail.