Light Sterile Neutrinos, Left-Right Symmetry, and $0\nu \beta \beta$ Decay

Abstract

We investigate neutrinoless double beta ($0\nu \beta \beta$) decay rates in minimal left-right symmetric models in presence of relatively light right-handed neutrinos. By use of an effective field theory approach, we systematically include all contributions in the model as well as the dependence of the decay amplitude on the masses of right-handed neutrinos. In type-I and type-II seesaw scenarios, we analyze the impact of right-handed neutrinos heavier than about 10 MeV, showing that this effect can lead to a detection of $0\nu \beta \beta$ decay in the next-generation experiments even for the normal hierarchy and a relatively large right-handed scale set by the mass of hypothetical right-handed gauge bosons. Finally, we comment on a possible connection between light right-handed neutrinos and the strong CP problem.

36 pages, 7 figures

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Cited by in corpus (5)

• Long-lived heavy neutral leptons from mesons in effective field theory
• $\nu$DoBe -- A Python Tool for Neutrinoless Double Beta Decay
• Neutrinoless double beta decay in Left-Right symmetric model with double seesaw mechanism
• New Physics Search at the CEPC: a General Perspective
• Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay