Supersymmetric Orientifolds in 6D with D-Branes at Angles

Details Supersymmetric Orientifolds in 6D with D-Branes at Angles Supersymmetric Orientifolds in 6D with D-Branes at Angles

1999-08-19

arxiv.org/abs/hep-th/9908130v2

Nucl.Phys. B569 (2000) 209-228

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, TeX, harvmac, 9 figures, intro changed, ref. added, Z_6 spectrum slightly changed

Scientific paper

10.1016/S0550-3213(99)00795-6

We study a new class of N=1 supersymmetric orientifolds in six space-time dimensions. The world-sheet parity transformation is combined with a permutation of the internal complex coordinates. In contrast to ordinary orientifolds the twisted sectors contribute to the Klein bottle amplitude leading to new tadpoles to be cancelled by twisted open string sectors. They arise from open strings stretched between D7-branes intersecting at non-trivial angles. We study in detail the Z_3, Z_4 and Z_6 permutational orientifolds obtaining in all cases anomaly free massless spectra.

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