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arXiv · 1701.02107

Neutrinoless Double Beta Decay in Left-Right Symmetry with Universal Seesaw

Frank F. Deppisch·Chandan Hati·Sudhanwa Patra·Prativa Pritimita·Utpal Sarkar
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Abstract

We discuss a class of left-right symmetric theories with a universal seesaw mechanism for fermion masses and mixing and the implications for neutrinoless double beta ($0\nu\beta\beta$) decay where neutrino masses are governed by natural type-II seesaw dominance. The scalar sector consists of left- and right-handed Higgs doublets and triplets, while the conventional Higgs bidoublet is absent in this scenario. We use the Higgs doublets to implement the left-right and the electroweak symmetry breaking. On the other hand, the Higgs triplets with induced vacuum expectation values can give Majorana masses to light and heavy neutrinos and mediate $0\nu\beta\beta$ decay. In the absence of the Dirac mass terms for the neutrinos, this framework can naturally realize type-II seesaw dominance even if the right-handed neutrinos have masses of a few TeV. We study the implications of this framework in the context of $0\nu\beta\beta$ decay and gauge coupling unification.

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Frank F. Deppisch, Chandan Hati, Sudhanwa Patra, Prativa Pritimita, Utpal Sarkar. 2017-01-09. Neutrinoless Double Beta Decay in Left-Right Symmetry with Universal Seesaw. https://doi.org/10.1103/physrevd.97.035005

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