Neutrinoless Double Beta Decay in Left-Right Symmetry with Universal Seesaw
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 () 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 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 decay and gauge coupling unification.
Keywords
Cite
@article{arxiv.1701.02107,
title = {Neutrinoless Double Beta Decay in Left-Right Symmetry with Universal Seesaw},
author = {Frank F. Deppisch and Chandan Hati and Sudhanwa Patra and Prativa Pritimita and Utpal Sarkar},
journal= {arXiv preprint arXiv:1701.02107},
year = {2018}
}
Comments
9 pages, 3 figures, regular article