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Shamit Kachru : Fun with Supersymmetric Three-Cycles (Dec 10, 1999 2:00 PM)

We study the physics of D6 branes wrapped on supersymmetric three-cycles in type IIA string theory. In particular, we argue that although the superpotential in the resulting field theories vanishes to all orders in \alpha', nonperturbative contributions (from disk instantons) should generically be present. We discuss how mirror symmetry can relate these to tree-level sigma model computations in some circumstances. We also present an illustration of the role that background closed string moduli play in the brane worldvolume theory.

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