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On the Origin of Neutrino Masses

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arxiv 0906.2950 v2 pith:TXY4PCTA submitted 2009-06-16 hep-ph hep-ex

classification hep-phhep-ex
keywords massesneutrinoleveladdingcolorgeneratenumberoctet
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We discuss the simplest mechanisms for generating neutrino masses at tree level and one loop level. We find a significant number of new possibilities where one can generate neutrino masses at the one-loop level by adding only two new types of representations. These models have renormalizable interactions that automatically conserve baryon number. Adding to the minimal standard model a scalar color octet with SU(3) X SU(2) X U(1) quantum numbers, (8,2,1/2), and a fermionic color octet in the fundamental or adjoint representation of SU(2) one can generate neutrino masses in agreement with the experiment. Signals at the LHC, and constraints from flavour violation are briefly discussed.

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  1. The QCD Axion and Neutrino Masses

    hep-ph 2026-08 conditional novelty 5.0 of 10

    If the QCD axion and neutrino masses share a single symmetry-breaking scale, the axion necessarily couples to neutrinos and can decay into a monochromatic neutrino signal.

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