Crosscaps, Boundaries and T-Duality

Details Crosscaps, Boundaries and T-Duality Crosscaps, Boundaries and T-Duality

2000-04-13

arxiv.org/abs/hep-th/0004100v1

Nucl.Phys. B584 (2000) 705-718

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 14 pages

Scientific paper

10.1016/S0550-3213(00)00320-5

Open descendants with boundaries and crosscaps of non-trivial automorphism type are studied. We focus on the case where the bulk symmetry is broken to a Z_2 orbifold subalgebra. By requiring positivity and integrality for the open sector, we derive a unique crosscap of automorphism type g \in Z_2 and a corresponding g-twisted Klein bottle for a charge conjugation invariant. As a specific example, we use T-duality to construct the descendants of the true diagonal invariant with symmetry preserving crosscaps and boundaries.

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