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A4-based tri-bimaximal mixing within inverse and linear seesaw schemes
We consider tri-bimaximal lepton mixing within low-scale seesaw schemes where
light neutrino masses arise from TeV scale physics, potentially accessible at
the Large Hadron Collider (LHC). Two examples are considered, based on the A4
flavor symmetry realized within the inverse or the linear seesaw mechanisms.
Both are highly predictive so that in both the light neutrino sector
effectively depends only on three mass parameters and one Majorana phase, with
no CP violation in neutrino oscillations. We find that the linear seesaw leads
to a lower bound for neutrinoless double beta decay while the inverse seesaw
does not. The models also lead to potentially sizeable decay rates for lepton
flavor violating processes, tightly related by the assumed flavor symmetry.Comment: 8 pages, 3 figures. Experimental references added and figure 1
update