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Charges of twisted branes: the exceptional cases

Stefan Fredenhagen, Matthias R. Gaberdiel, Thomas Mettler

hep-tharXiv:hep-th/0504007

Abstract

The charges of the twisted D-branes for the two exceptional cases (SO(8) with the triality automorphism and E6 with charge conjugation) are determined. To this end the corresponding NIM-reps are expressed in terms of the fusion rules of the invariant subalgebras. As expected the charge groups are found to agree with those characterising the untwisted branes.

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