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Proton Lifetime Upper Bound in Non-SUSY SU(5) GUT

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abstract

In preparation for upcoming nucleon decay searches at Hyper-Kamiokande, it is important to derive a theoretical upper bound on the proton lifetime in a general class of grand unified theory (GUT) models. In this paper, we make an attempt along this direction for non-SUSY SU(5) models, under the mild restrictions that only one or two SM-decomposed multiplets are singularly light, and that the SU(5) gauge theory is asymptotically free and thus there are no too large representations in the model. We derive criteria for SM-decomposed multiplets that potentially enhance the proton lifetime when they are singularly light. We perform a numerical analysis on the proton lifetime and show that some choices of singularly light multiplets can provide a testable upper bound on the proton lifetime.

fields

hep-ph 1

years

2025 1

verdicts

UNVERDICTED 1

representative citing papers

Good flavor search in SU(5): a machine learning approach

hep-ph · 2025-11-11 · unverdicted · novelty 4.0

Machine learning optimization of a generalized SU(5) parameter y finds y ≈ 0.8 produces the closest match to the original model while resolving the fermion mass discrepancy.

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Showing 1 of 1 citing paper.

  • Good flavor search in SU(5): a machine learning approach hep-ph · 2025-11-11 · unverdicted · none · ref 23 · internal anchor

    Machine learning optimization of a generalized SU(5) parameter y finds y ≈ 0.8 produces the closest match to the original model while resolving the fermion mass discrepancy.