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arXiv · 1701.08675

Universal Seesaw and $0\nu\beta\beta$ in new 3331 left-right symmetric model

Debasish Borah·Sudhanwa Patra
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Abstract

We consider a class of left-right symmetric model with enlarged gauge group $SU(3)_c \times SU(3)_L \times SU(3)_R \times U(1)_X$ without having scalar bitriplet. In the absence of scalar bitriplet, there is no Dirac mass term for fermions including usual quarks and leptons. We introduce new isosinglet vector-like fermions so that all the fermions get their masses through a universal seesaw mechanism. We extend our discussion to neutrino mass and its implications in neutrinoless double beta decay ($0\nu\beta\beta$). We show that for TeV scale $SU(3)_R$ gauge bosons, the heavy-light neutrino mixing contributes dominantly to $0\nu\beta\beta$ that can be observed at ongoing experiments. Towards the end we also comment on different possible symmetry breaking patterns of this enlarged gauge symmetry to that of the standard model.

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Debasish Borah, Sudhanwa Patra. 2017-01-30. Universal Seesaw and $0\nu\beta\beta$ in new 3331 left-right symmetric model. https://doi.org/10.1016/j.physletb.2017.05.059

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