Abstract
A variation of the original 2006 radiative seesaw model of neutrino mass through dark matter is shown to realize the notion of inverse seesaw naturally. The dark-matter candidate here is the lightest of three real singlet scalars which may also carry flavor.
Highlights
In 1998, the simplest realizations of the dimension-five operator [1] for Majorana neutrino mass, i.e.(νjφ0), were discussed systematically [2] for the first time
Note that whereas (E0, E−)L is not needed to complete the loop, it serves the dual purpose of (1) rendering the theory to be anomaly-free and (2) allowing E to have an invariant mass for the implementation of the inverse seesaw mechanism
The notion of inverse seesaw [9, 10, 11] is based on an extension of the 2 × 2 mass matrix of the canonical seesaw to a 3 × 3 mass matrix by the addition of a second singlet fermion
Summary
In 1998, the simplest realizations of the dimension-five operator [1] for Majorana neutrino mass, i.e. (νiφ0)(νjφ0), were discussed systematically [2] for the first time. Note that whereas (E0, E−)L is not needed to complete the loop, it serves the dual purpose of (1) rendering the theory to be anomaly-free and (2) allowing E to have an invariant mass for the implementation of the inverse seesaw mechanism. If mS,N is assumed much less than m1, the induced neutrino mass is mν m22mS m21
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