
AbstractWe give a pedagogical introduction to D‐brane instanton effects in vacuum configurations with open and unoriented strings. We focus on quiver gauge theories for unoriented D‐branes at orbifold singularities and describe in some detail the ℤ3 case, where both ‘gauge’ and ‘exotic’ instantons can generate non‐perturbative super potentials, and the ℤ5 case, where supersymmetry breaking may arise from the combined effect of ‘gauge’ instantons and a FI D‐term.
MODELLI E METODI MATEMATICI, High Energy Physics - Theory, High Energy Physics - Theory (hep-th), nonperturbative effects, D-branes, Applications of vector bundles and moduli spaces in mathematical physics (twistor theory, instantons, quantum field theory), gauge theories, FOS: Physical sciences, Settore FIS/02 - FISICA TEORICA, String and superstring theories; other extended objects (e.g., branes) in quantum field theory, Nonperturbative methods of renormalization applied to problems in quantum field theory
MODELLI E METODI MATEMATICI, High Energy Physics - Theory, High Energy Physics - Theory (hep-th), nonperturbative effects, D-branes, Applications of vector bundles and moduli spaces in mathematical physics (twistor theory, instantons, quantum field theory), gauge theories, FOS: Physical sciences, Settore FIS/02 - FISICA TEORICA, String and superstring theories; other extended objects (e.g., branes) in quantum field theory, Nonperturbative methods of renormalization applied to problems in quantum field theory
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