Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-08-09
Physics
High Energy Physics
High Energy Physics - Theory
125 pages, 2 tables, based on Ph.D. thesis
Scientific paper
This paper contains the results of our investigations of BPS instantons and of our work on N=2 supersymmetric gauge theories. The BPS instantons we study appear in type II string theory compactifications on Calabi-Yau threefolds. In the corresponding four-dimensional effective supergravity actions the BPS instantons arise as finite action solutions to the Euclidean equations of motion. For N=2 supersymmetric gauge theories we construct general Lagrangians involving gauge groups with (non-abelian) electric and magnetic (dyonic) charges. In this work a coupling to hypermultiplets is included.
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