Published November 1, 2000
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Tachyon condensation in unstable type I D-brane systems
- Creators
- Bergman, Oren
Abstract
Type-I string theory provides eight classes of unstable D-brane systems. We determine the gauge group and tachyon spectrum for each one, and thereby describe the gauge symmetry breaking pattern in the low-energy world-volume field theory. The topologies of the resulting coset vacuum manifolds are related to the real K-theory groups KO-n, extending the known relations between the type-II classifying spaces BU and U and the complex K-theory groups K0 and K-1. We also comment on the role of the background D9-branes.
Additional Information
Received 12 October 2000, accepted for publication 10 November 2000, Published 12 December 2000 I would like to thank Jaume Gomis and Edward Witten for useful conversations, and John Schwarz for earlier collaboration on some of the material in section 4. I would also like to thank Edward Witten for pointing out an error in the first version of this paper. Finally, I thank the Aspen Center for Physics for its warm hospitality. This work is supported in part by the DOE under grant no. DE-FG03-92-ER 40701. E-print number: hep-th/0009252Files
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- 1256
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