A4-based tri-bimaximal mixing within inverse and linear seesaw schemes

Details A4-based tri-bimaximal mixing within inverse and linear seesaw schemes A4-based tri-bimaximal mixing within inverse and linear seesaw schemes

2009-05-19

arxiv.org/abs/0905.3056v2

Phys.Lett.B679:454-459,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures. Experimental references added and figure 1 updated

Scientific paper

10.1016/j.physletb.2009.08.003

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.

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