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

Abstract

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.

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

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Cited by in corpus (1)

• Beyond the SM; D-brane model building from intersecting brane worlds