D-brane Instantons on the T^6/Z_3 orientifold

Abstract

We give a detailed microscopic derivation of gauge and stringy instanton generated superpotentials for gauge theories living on D3-branes at Z_3-orientifold singularities. Gauge instantons are generated by D(-1)-branes and lead to Affleck, Dine and Seiberg (ADS) like superpotentials in the effective N=1 gauge theories with three generations of bifundamental and anti/symmetric matter. Stringy instanton effects are generated by Euclidean ED3-branes wrapping four-cycles on T^6/\Z_3. They give rise to Majorana masses in one case and non-renormalizable superpotentials for the other cases. Finally we determine the conditions under which ADS like superpotentials are generated in N=1 gauge theories with adjoints, fundamentals, symmetric and antisymmetric chiral matter.

31 pages, no figures

References in corpus (5)

• Small Instantons, Little Strings and Free Fermions
• Computation of D-brane instanton induced superpotential couplings - Majorana masses from string theory
• Non-perturbative and Flux superpotentials for Type I strings on the Z_3 orbifold
• Open strings and their symmetry groups
• Instantons and Supersymmetry

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• On the Geometry of Metastable Supersymmetry Breaking
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• D-brane Instantons in 4D Supersymmetric String Vacua