Twisted Open Strings from Closed Strings: The WZW Orientation Orbifolds

Details Twisted Open Strings from Closed Strings: The WZW Orientation Orbifolds Twisted Open Strings from Closed Strings: The WZW Orientation Orbifolds

2003-06-03

arxiv.org/abs/hep-th/0306014v2

Int.J.Mod.Phys. A19 (2004) 2233-2292

Physics

High Energy Physics

High Energy Physics - Theory

65 pages, typos corrected

Scientific paper

10.1142/S0217751X04018531

Including {\it world-sheet orientation-reversing automorphisms} $\hat{h}_{\sigma} \in H_-$ in the orbifold program, we construct the operator algebras and twisted KZ systems of the general WZW {\it orientation orbifold} $A_g (H_-) /H_-$. We find that the orientation-orbifold sectors corresponding to each $\hat{h}_{\sigma} \in H_-$ are {\it twisted open} WZW strings, whose properties are quite distinct from conventional open-string orientifold sectors. As simple illustrations, we also discuss the classical (high-level) limit of our construction and free-boson examples on abelian $g$.

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