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The trouble with the minimal renormalizable SO(10) GUT
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abstract
We scrutinize the physical viability of the minimal non-supersymmetric $\mathrm{SO}(10)$ GUT with the scalar sector $\mathbf{45}\oplus\mathbf{126}\oplus\mathbf{10}_{\mathbb{C}}$, in which the unified symmetry is broken by the former two representations, and a realistic Yukawa sector is supported by the last two. Alongside the known issue of a relatively low GUT scale (and thus overly fast proton decay) encountered in minimally fine-tuned scenarios, we identify a very general problem of the model: the inability to properly accommodate a Standard-Model-like low-energy Higgs doublet in the perturbative regime.
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Cited by 1 Pith paper
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Unravelling the Scalar Sector of Grand Unification: Phenomenology & Implications
A systematic classification of how grand unified theory scalars violate baryon and lepton number, predicting a kaon-dominant proton decay pattern and mass bounds down to scales far below the GUT scale.
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