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arXiv · hep-th/0009224

Non-BPS Branes in a Type I Orbifold

E. Eyras·S. Panda
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Abstract

We analyse the spectrum of non-BPS branes in the type I theory on the orbifold $T^4/{\cal I}_4$. We present a detailed analysis of the action of the worldsheet parity $Ω$ on the different D-brane boundary state sectors of type IIB on $T^4/{\cal I}_4$, using the covariant formulation. Using these results we derive the spectrum of branes in the type I orbifold. We find $\Z_2$- and $\Z$- charged non-BPS branes. A study of the stability of these branes in the type I orbifold is also presented. We find that the type I non-BPS D-particle and D-instanton remain stable in the orbifold. The D-particle carries no charge whereas the non-BPS D-instanton can carry twisted R-R charge.

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E. Eyras, S. Panda. 2001-05-21. Non-BPS Branes in a Type I Orbifold. https://doi.org/10.1088/1126-6708%2F2001%2F05%2F056

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