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Unification without supersymmetry: neutrino mass, proton decay and light leptoquarks

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arxiv hep-ph/0504276 v1 pith:BTCRUVEB submitted 2005-04-28 hep-ph hep-ex

classification hep-phhep-ex
keywords leptoquarkslightmassscenariocolliderdecayminimalneutrino
verification ladder T0 review T1 audit T2 compute T3 formal

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We investigate predictions of a minimal realistic non-supersymmetric SU(5) grand unified theory. To accomplish unification and generate neutrino mass we introduce one extra Higgs representation--a 15 of SU(5)--to the particle content of the minimal Georgi-Glashow scenario. Generic prediction of this setup is a set of rather light scalar leptoquarks. In the case of the most natural implementation of the type II see-saw mechanism their mass is in the phenomenologically interesting region (O(10^2--10^3) GeV). As such, our scenario has a potential to be tested at the next generation of collider experiments, particularly at the Large Hadron Collider (LHC) at CERN. The presence of the 15 generates additional contributions to proton decay which, for light scalar leptoquarks, can be more important than the usual gauge d=6 ones. We exhaustively study both and show that the scenario is not excluded by current experimental bounds on nucleon lifetimes.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Non-Renormalizable SU(5) GUTs: Leptoquark-Induced Neutrino Masses

    hep-ph 2025-04 conditional novelty 6.0 of 10

    The paper shows that non-renormalizable SU(5) models can host light scalar leptoquarks with suppressed proton decay while explaining neutrino masses and unifying gauge couplings.

  2. Ultraviolet Completion of a Two-loop Neutrino Mass Model

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A new SU(5) grand unified version of the Zee-Babu model predicts TeV-scale colored scalars, a vector-like down quark, and observable proton decay p→e+π0 at Hyper-Kamiokande.

  3. Gravitational waves from graviton bremsstrahlung in scalar leptoquark decays

    hep-ph 2026-06 unverdicted novelty 4.0 of 10

    Scalar leptoquarks in SU(5) GUT produce a stochastic gravitational wave background via graviton bremsstrahlung whose spectrum may be accessible to resonant-cavity detectors.

  4. Neutrino Mass Induced $n$-$\overline{n}$ Oscillation

    hep-ph 2025-10 conditional novelty 4.0 of 10

    In the Georgi-Glashow SU(5) theory, generating a Majorana neutrino mass necessarily produces neutron–antineutron oscillation from the same operator.

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