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A grand unified model with $M_G\sim M_{string}$ and $M_I\sim 10^{12}$ GeV

N. G. Deshpande·B. Dutta·E. Keith
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Abstract

We present a model based on the gauge group SU(2)_L\times SU(2)_R \times SU(4)_C with gauge couplings that are found to be unified at a scale near the string unification scale. This model breaks to the MSSM at an intermediate scale which is instrumental in producing a neutrino in a mass range that can serve as hot dark matter and can also solve the strong CP problem via a harmless invisible axion.

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N. G. Deshpande, B. Dutta, E. Keith. 1996-11-09. A grand unified model with $M_G\sim M_{string}$ and $M_I\sim 10^{12}$ GeV. https://arxiv.org/abs/hep-ph/9611287

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