Work

Neutrinoless double beta decay in left-right symmetric models with a universal seesaw mechanism

Year: 2018

Type: article

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 ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) 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 $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ 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 $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ decay.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.97.035005

Authors: Frank F. Deppisch, Chandan Hati, Sudhanwa Patra, Prativa Pritimita, Utpal Sarkar