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Seesaw at LHC
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We study the implementation of the type III seesaw in the ordinary nonsupersymmetric SU(5) grand unified theory. This allows for an alternative definition of the minimal SU(5) model, with the inclusion of the adjoint fermionic multiplet. The main prediction of the theory is the light fermionic SU(2) triplet with mass at the electroweak scale. Due to their gauge couplings, these triplets can be produced pair-wise via Drell-Yan, and due to the Majorana nature of the neutral component their decays leave a clear signature of same sign di-leptons and four jets. This allows for their possible discovery at LHC and provides an example of directly measurable seesaw parameters.
Forward citations
Cited by 8 Pith papers
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Heavy Axion from a Confining Mirror GUT
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Ultraviolet Completion of a Two-loop Neutrino Mass Model
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Sensitivity of Lepton Number Violating Meson Decays in Different Experiments
For 0.14 to 6 GeV heavy neutrinos, accounting for the parent meson's velocity weakens projected LNV meson decay sensitivities by one to two orders of magnitude at NA62 and SHiP.
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The QCD Axion and Unification
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Gravitational waves from graviton bremsstrahlung in scalar leptoquark decays
Scalar leptoquarks in SU(5) GUT produce a stochastic gravitational wave background via graviton bremsstrahlung whose spectrum may be accessible to resonant-cavity detectors.
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Torsional four-fermion interaction for Majorana neutrinos
Torsion-induced four-fermion interactions modify effective masses and mixing parameters for Majorana neutrinos with sterile partners in matter.
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Neutrino Mass Induced $n$-$\overline{n}$ Oscillation
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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