Dirichlet Branes on Orientifolds

Abstract

We consider the classification of BPS and non-BPS D-branes in orientifold models. In particular we construct all stable BPS and non-BPS D-branes in the Gimon-Polchinski (GP) and Dabholkar-Park-Blum-Zaffaroni (DPBZ) orientifolds and determine their stability regions in moduli space as well as decay products. We find several kinds of integrally and torsion charged non-BPS D-branes. Certain of these are found to have projective representations of the orientifold $\times$ GSO group on the Chan-Paton factors. It is found that the GP orientifold is not described by equivariant orthogonal K-theory as may have been at first expected. Instead a twisted version of this K-theory is expected to be relevant.

33 pages, LaTeX, 5 figures. v2 typos corrected, references included, (4,s)-branes re-examined

References in corpus (5)

• Branes on Group Manifolds, Gluon Condensates, and twisted K-theory
• The fate of the type I non-BPS D7-brane
• Discrete torsion orbifolds and D-branes II
• Classifying orientifolds by flat n-gerbes
• Non-BPS D-branes and M-theory

Cited by in corpus (13)

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• D-instanton Induced Superpotential
• D-brane Spectrum and K-theory Constraints of D=4, N=1 Orientifolds
• Branes and Fluxes in Orientifolds and K-theory
• Fractional D3-branes in diverse backgrounds
• Fractional Branes in Non-compact Type IIA Orientifolds
• Comments on D-branes on Orbifolds and K-theory
• Gepner-like boundary states on $T^4$
• One-loop and D-instanton corrections to the effective action of open string models
• D-branes, Supersymmetry Breaking, and Neutrinos