Stringy instantons and quiver gauge theories

Creators: Florea, Bogdan; Kachru, Shamit; McGreevy, John; Saulina, Natalia

Abstract

We explore contributions to the 4D effective superpotential which arise from Euclidean D3 branes ("instantons") that intersect space-filling D-branes. These effects can perturb the effective field theory on the space-filling branes by nontrivial operators composed of charged matter fields, changing the vacuum structure in a qualitative way in some examples. Our considerations are exemplified throughout by a careful study of a fractional brane configuration on a del Pezzo surface.

Additional Information

© 2007 SISSA. Received 2 February 2007, accepted for publication 27 April 2007, Published 8 May 2007. We thank Riccardo Argurio, Matteo Bertolini, Chris Herzog, Ken Intriligator, Anton Kapustin, Igor Klebanov, Melissa Liu, Liam McAllister, Hirosi Ooguri, Eva Silverstein, Peter Svrcek, Jay Wacker, Johannes Walcher and Martijn Wijnholt for helpful discussions. The work of the Stanford authors was supported in part by the NSF under grant PHY-0244728, the DOE under contract DE-AC03-76SF00515, and a David and Lucile Packard Foundation Fellowship for Science and Engineering. The work of N.S. was supported in part by NSF grants PHY-0244821 and DMS-0244464. The work of J.M. is supported in part by funds provided by the U.S. Department of Energy (D.O.E.) under cooperative research agreement DE-FG0205ER41360. S.K. is grateful to the KITP for hospitality. E-print number: hep-th/0610003

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