Supersymmetric orientifolds in 4D with D-branes at angles

Abstract

Citation for published item:p¤ orsteD F nd ronekerD qF nd hreyerD F @PHHIA 9upersymmetri xw orientifolds in Rh with hErnes t nglesF9D xuler physis fFD SWQ @IEPAF ppF IPUEISRF Further information on publisher's website: httpXGGdxFdoiForgGIHFIHITGHSSHEQPIQ@HHAHHTITEU Publisher's copyright statement:Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract We construct orientifolds of type IIA string theory. The theory is compactified on a T 6 /Z N × Z M orbifold. In addition worldsheet parity in combination with a reflection of three compact directions is modded out. Tadpole cancellation requires to add D-6-branes at angles. The resulting four dimensional theories are N = 1 supersymmetric and non-chiral.

Chiral supersymmetric models on an orientifold of with intersecting D6-branes

“…These states are listed in table 3. The part of the non-chiral spectrum which involves only 'filler branes' is supersymmetric and can easily be seen to be identical to the one computed in [5] for the special case…”

“…All Z 2 ×Z 2 insertions Θ 2k ω l in the loop channel preserve any configuration of D6-branes but lead to Z 2 twisted RR charges which cannot be compensated for by the Klein bottle and Möbius strip amplitudes. Therefore, as in the previously studied cases with Z 2 subsymmetries [4,5,7,21], the prefactors of the amplitudes with Θ 2k ω l insertions have to vanish, i.e. trγ Θ 2k ω l = 0 for all D6-branes.…”

Chiral D-brane Models with Frozen Open String Moduli

“…Quite remarkably, some models admit gauge groups and chiral spectra rather close to either the Standard Model or proposed extensions of it. 6 These constructions are based on orientifolds of toroidal orbifolds of the form (T 2 × T 2 × T 2 )/Γ [68,69] and, as we will now review, they all employ non-rigid 3-cycles. 7 We have summarized such orbifold backgrounds and their Hodge numbers in table 1.…”

Type I strings with F- and B-flux

“…On the one hand one can compactify on curved spaces, in particular orbifolds, leading to supersymmetric [1,2,3,4] and nonsupersymmetric [5,6] models in six and four dimensions. On the other hand, as was first pointed out in [7] and described in a pure stringy language in [8], one can obtain chiral spectra by introducing D-branes with magnetic flux, or, in a T-dual interpretation, D-branes at angles [9,10,11,12,13].…”