4D GUT (and SM) Model Building from Intersecting D-Branes

Details 4D GUT (and SM) Model Building from Intersecting D-Branes 4D GUT (and SM) Model Building from Intersecting D-Branes

2003-10-20

arxiv.org/abs/hep-th/0310194v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, LaTex, Contribution to the Proceedings of the "String Phenomenology 2003" conference, Durham, England, 29th July - 4t

Scientific paper

We provide a general overview of the current state of the art in three generation model building proposals - using intersecting D-brane toroidal compactifications of IIA string theories - which have, only, the SM at low energy. In this context, we focus on these model building directions, where natural non-supersymmetric constructions based on $SU(4)_C \times SU(2)_L \times SU(2)_R$, SU(5) and flipped SU(5) GUT groups, have at low energy only the Standard Model. In the flipped SU(5) GUTS, the special build up structure of the models accommodates naturally a see-saw mechanism and a new solution to the doublet-triplet splitting problem.

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