SUSY breaking mediation by D-brane instantons

Abstract

It is well known that D-brane instantons can generate contributions to the effective superpotential of gauge theories living on D-branes which are perturbatively forbidden by global U(1) symmetries. We extend this idea to theories with supersymmetry breaking, studying the effect of D-brane instantons stretched between the SUSY-breaking and visible sectors. Analogously to what happens in the SUSY case, this mechanism can give rise to perturbatively forbidden soft terms (among other effects). We introduce and discuss general properties of instanton mediation. We illustrate our ideas in simple Type IIB toroidal orientifolds. As a bi-product, we present a string theory realization of a Polonyi hidden sector.

42 pages, 7 figures. V2. typos fixed and references added

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• Exotic prepotentials from D(-1)D7 dynamics
• Stringy Instantons and Yukawa Couplings in MSSM-like Orientifold Models
• Dynamical supersymmetry breaking from unoriented D-brane instantons
• An Instanton Toolbox for F-Theory Model Building
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• Stringy instanton corrections to N=2 gauge couplings
• Bipartite Field Theories from D-Branes
• Searching for the Standard Model in the String Landscape : SUSY GUTs
• Minimal Surfaces and Weak Gravity
• Muon and Electron $(g-2)$ Anomalies with Non-Holomorphic Interactions in MSSM
• E3-brane instantons and baryonic operators for D3-branes on toric singularities
• Superpotential de-sequestering in string models
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• Toric Lego: A method for modular model building
• F-theory and the LHC: Stau Search
• D-brane Instantons as Gauge Instantons in Orientifolds of Chiral Quiver Theories
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• A Toy Model for Gauge-Mediation in Intersecting Brane Models
• Applications of String Theory: Non-perturbative Effects in Flux Compactifications and Effective Description of Statistical Systems