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Tachyon condensation in unstable type I D-brane systems

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arxiv hep-th/0009252 v2 pith:37VNIYQM submitted 2000-09-29 hep-th

classification hep-th
keywords typed-branegaugegroupsk-theorysystemstachyontheory
verification ladder T0 review T1 audit T2 compute T3 formal
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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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  1. Anomalies and D-branes in the Dabholkar-Park background

    hep-th 2024-12 conditional novelty 6.0 of 10

    Stable D-branes in the Dabholkar-Park background are derived from world-sheet anomalies with boundary Majorana fermions, matching the known relative KR-theory classification and explaining its 4-fold periodicity.

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