Dirichlet Branes on Orientifolds

Details Dirichlet Branes on Orientifolds Dirichlet Branes on Orientifolds

2001-10-04

arxiv.org/abs/hep-th/0110041v2

Phys.Rev. D66 (2002) 026002

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1103/PhysRevD.66.026002

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.

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