Orientifolds, hypercharge embeddings and the Standard Model

Details Orientifolds, hypercharge embeddings and the Standard Model Orientifolds, hypercharge embeddings and the Standard Model

2006-05-23

arxiv.org/abs/hep-th/0605226v2

Nucl.Phys.B759:83-146,2006

Physics

High Energy Physics

High Energy Physics - Theory

85 pages, 6 eps figures, LaTeX, youngtab package

Scientific paper

10.1016/j.nuclphysb.2006.10.013

The embedding of the SM hypercharge into an orientifold gauge group is studied. Possible embeddings are classified, and a systematic construction of bottom-up configurations and top-down orientifold vacua is achieved, solving the tadpole conditions in the context of Gepner orientifolds. Some hypercharge embeddings are strongly preferred compared to others. Configurations with chiral antisymmetric tensors are suppressed. We find among others, genuine examples of supersymmetric SU(5), flipped SU(5), Pati-Salam and trinification vacua with no chiral exotics.

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