Abstract
We analyze nucleon decay modes in a no-scale supersymmetric flipped SU(5) GUT model, and contrast them with the predictions for proton decays via dimension-6 operators in a standard unflipped supersymmetric SU(5) GUT model. We find that these GUT models make very different predictions for the ratios Γ(p → π0μ+)/Γ(p → π0e+), Γ(p → \( {\pi}^{+}\overline{\nu} \))/Γ(p → π0e+), Γ(p → K0e+)/Γ(p → π0e+) and Γ(p → K0μ+)/Γ(p → π0μ+), and that predictions for the ratios Γ(p → π0μ+)/Γ(p → π0e+) and Γ(p → \( {\pi}^{+}\overline{\nu} \))/Γ(p → π0e+) also differ in variants of the flipped SU(5) model with normal- or inverse-ordered light neutrino masses. Upcoming large neutrino experiments may have interesting opportunities to explore both GUT and flavour physics in proton and neutron decays.
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Ellis, J., Garcia, M.A.G., Nagata, N. et al. Proton decay: flipped vs. unflipped SU(5). J. High Energ. Phys. 2020, 21 (2020). https://doi.org/10.1007/JHEP05(2020)021
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DOI: https://doi.org/10.1007/JHEP05(2020)021