paper

Supersymmetric 4D Orientifolds of Type IIA with D6-branes at Angles

arXiv:hep-th/9912204 · doi:10.1088/1126-6708/2000/01/040

Abstract

We study a certain class of four-dimensional N=1 supersymmetric orientifolds for which the world-sheet parity transformation is combined with a complex conjugation in the compact directions. We investigate in detail the orientifolds of the Z_3, Z_4, Z_6 and Z_6' toroidal orbifolds finding solutions to the tadpole cancellation conditions for all models. Generically, all the massless spectra turn out to be non-chiral.

28 pages, LaTeX, 6 figures; v2: slight modification of closed string spectra

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