Abstract
SU(5) ⊗ SU(5) provides a minimal grand unification scheme for fermions and gauge forces if there are vector-like quarks and leptons in nature. We explore the gauge coupling unification in a non-supersymmetric model of this type, and study its implications for proton decay. The properties of vector-like quarks and intermediate scales that emerge from coupling unification play a central role in suppressing proton decay. We find that in this model, the familiar decay mode p → e +π0 may have a partial lifetime within the reach of currently planned experiments.
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Lee, CH., Mohapatra, R.N. Vector-like quarks and leptons, SU(5) ⊗ SU(5) grand unification, and proton decay. J. High Energ. Phys. 2017, 80 (2017). https://doi.org/10.1007/JHEP02(2017)080
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DOI: https://doi.org/10.1007/JHEP02(2017)080