Lack of trinification in Z_3 orbifolds of the SO(32) heterotic string

Details Lack of trinification in Z_3 orbifolds of the SO(32) heterotic string Lack of trinification in Z_3 orbifolds of the SO(32) heterotic string

2004-02-19

arxiv.org/abs/hep-ph/0402201v2

Mod.Phys.Lett. A20 (2005) 2369-2375

Physics

High Energy Physics

High Energy Physics - Phenomenology

1+7 pages, comments and refs added

Scientific paper

10.1142/S021773230501858X

We report results relating to the trinification scenario in some explicit string constructions that contain SU(3)^3 as a gauge symmetry. These models are obtained from symmetric Z_3 orbifolds of the SO(32) heterotic string with one discrete Wilson line. We highlight the obstacles that were encountered: the absence of the usual Higgs sector that would break SU(3)^3 \to SU(3)_c \times SU(2)_L \times U(1)_Y; the presence of exotics that would generically befoul gauge coupling unification and lead to fractionally-charged states in the low energy spectrum.

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