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Unification without low-energy supersymmetry

Soren Wiesenfeldt
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Abstract

Without supersymmetry, the gauge couplings in the standard model with five Higgs doublets unify around 10^14 GeV. In this case, the trinified model, SU(3)_C x SU(3)_L x SU(3)_R x Z_3, with the minimal Higgs sector required for symmetry breaking, is the ideal grand-unified candidate. Small neutrino masses are generated via a radiative seesaw mechanism, without the need for intermediate scales, additional Higgs fields, or higher-dimensional operators. The proton lifetime is above the experimental limits, with the decay modes p -> \barνK^+ and p -> mu^+ K^0 potentially observable. The split-SUSY version of the model, with one light Higgs doublet, is equally attractive.

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Soren Wiesenfeldt. 2006-10-20. Unification without low-energy supersymmetry. https://doi.org/10.1063/1.2735232

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