Tachyon condensation in unstable type I D-brane systems

Details Tachyon condensation in unstable type I D-brane systems Tachyon condensation in unstable type I D-brane systems

2000-09-29

arxiv.org/abs/hep-th/0009252v2

JHEP 0011 (2000) 015

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, LaTex; footnote regarding bosonic D-branes has been corrected, references added

Scientific paper

10.1088/1126-6708/2000/11/015

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 K^0 and K^{-1}. We also comment on the role of the background D9-branes.

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