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Comments on Open-String Orbifolds with a Non-Vanishing B_{ab}

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arxiv hep-th/9908064 v2 pith:BI7OYISJ submitted 1999-08-09 hep-th

Carlo Angelantonj (Ecole Polytechnique & Ecole Normale Superieure) This is my paper · ORCID
classification hep-th
keywords antisymmetriccased-branesgaugegroupsnon-vanishingns-nsopen-string
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We study the effect of a non-vanishing flux for the NS-NS antisymmetric tensor in open-string orbifolds. As in toroidal models, the total dimension of the Chan-Paton gauge group is reduced proportionally to the rank of $B_{ab}$, both on D9 and on D5-branes, while the Moebius amplitude involves some signs that, in the $Z_2$ case, allow one to connect continuously ${\rm U} (n)$ groups to $Sp(n) \otimes Sp(n)$ groups on each set of D-branes. In this case, non-universal couplings between twisted scalars and gauge vectors arise, as demanded by the generalised Green-Schwarz mechanism. We also comment on the role of the NS-NS antisymmetric tensor in a recently proposed type scenario, where supersymmetry is broken on the D-branes, while it is preserved in the bulk.

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Cited by 4 Pith papers

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