Grand Unification with Three Generations in Free Fermionic String Models

Details Grand Unification with Three Generations in Free Fermionic String Models Grand Unification with Three Generations in Free Fermionic String Models

1995-08-16

arxiv.org/abs/hep-th/9508073v2

Phys.Rev. D53 (1996) 5781-5789

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, latex. References added to original version

Scientific paper

10.1103/PhysRevD.53.5781

We examine the problem of constructing three generation free fermionic string models with grand unified gauge groups. We attempt the construction of $G\times G$ models, where $G$ is a grand unified group realized at level 1. This structure allows those Higgs representations to appear which are necessary to break the symmetry down to the standard model gauge group. For $G=SO(10)$, we find only models with an even number of generations. However, for $G=SU(5)$ we find a number of 3 generation models.

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