D=4, N=1 orientifolds with vector structure

Abstract

We construct compact type IIB orientifolds with discrete groups Z_4, Z_6, Z_6', Z_8, Z_12 and Z_12'. These models are N=1 supersymmetric in D=4 and have vector structure. The possibility of having vector structure in Z_N orientifolds with even N arises due to an alternative Omega-projection in the twisted sectors. Some of the models without vector structure are known to be inconsistent because of uncancelled tadpoles. We show that vector structure leads to a sign flip in the twisted Klein bottle contribution. As a consequence, all the tadpoles can be cancelled by introducing D9-branes and D5-branes.

Latex, 44 pages, 2 figures, v2: misprints and an error concerning Omega^2_{95} corrected, a comment on D5-branes with negative NSNS charge added, references and acknowledgements added

References in corpus (11)

• Brane Supersymmetry Breaking
• Supersymmetric 4D Orientifolds of Type IIA with D6-branes at Angles
• Type I vacua with brane supersymmetry breaking
• Tachyon-free Non-supersymmetric Type IIB Orientifolds via Brane-Antibrane Systems
• Standard-like Models with Broken Supersymmetry from Type I String Vacua
• Orientifolding the conifold
• Tadpole versus anomaly cancellation in D=4,6 compact IIB orientifolds
• Three Family Type IIB Orientifold String Vacua with Non-Abelian Wilson Lines
• Type IIB Orientifolds without Untwisted Tadpoles, and non-BPS D-branes
• Anomaly cancellation in D=4, N=1 orientifolds and linear/chiral multiplet duality
• Orientifolds with discrete torsion

Cited by in corpus (17)

• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• Progress in D-brane model building
• Supersymmetric Intersecting Branes on the Type IIA T^6/Z_4 orientifold
• Moduli Stabilization in Type IIB Orientifolds (II)
• Getting just the Supersymmetric Standard Model at Intersecting Branes on the Z6-orientifold
• RR photons
• Instanton Induced Open String Superpotentials and Branes at Singularities
• Mapping an Island in the Landscape
• In quest of "just" the Standard Model on D-branes at a singularity
• Heterotic SO(32) model building in four dimensions
• Strings, Branes and Extra Dimensions
• Type IIA Orientifolds on General Supersymmetric Z_N Orbifolds
• Type IIB Orientifolds without Untwisted Tadpoles, and non-BPS D-branes
• One-loop Einstein-Hilbert term in minimally supersymmetric type IIB orientifolds
• Statistics of intersecting D-brane models on T^6/Z_6
• A Classification of Toroidal Orientifold Models
• Dynamical Tadpoles and Weak Gravity Constraints