On the Origin of Neutrino Masses

Details On the Origin of Neutrino Masses On the Origin of Neutrino Masses

2009-06-16

arxiv.org/abs/0906.2950v2

Phys.Rev.D80:053006,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, minor corrections and typos corrected

Scientific paper

10.1103/PhysRevD.80.053006

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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