GUT Breaking on $M^4 \times T^2/(Z_2 \times Z_2^{\prime})$

Details GUT Breaking on $M^4 \times T^2/(Z_2 \times Z_2^{\prime})$ GUT Breaking on $M^4 \times T^2/(Z_2 \times Z_2^{\prime})$

2001-07-16

arxiv.org/abs/hep-th/0107136v3

Phys.Lett. B520 (2001) 377-384

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 10 pages, add comments on bulk fermions and supersymmetry, version to appear in PLB

Scientific paper

10.1016/S0370-2693(01)01146-7

We construct two SU(5) models on the space-time $M^4 \times T^2/(Z_2 \times Z_2^{\prime})$ where the gauge and Higgs fields are in the bulk and the Standard Model fermions are on the brane at the fixed point or line. For the zero modes, the SU(5) gauge symmetry is broken down to $SU(3) \times SU(2) \times U(1) $ due to non-trivil orbifold projection. In particular, if we put the Standard Model fermions on the 3-brane at the fixed point in Model II, we only have the zero modes and KK modes of the Standard Model gauge fields and two Higgs doublets on the observable 3-brane. So, we can have the low energy unification, and solve the triplet-doublet splitting problem, the gauge hierarchy problem, and the proton decay problem.

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