Neutrinoless double beta decays tell nature of right-handed neutrinos

TL;DR

This paper explores how neutrinoless double beta decay experiments can reveal the nature of light right-handed neutrinos within the minimal seesaw model, impacting future neutrino physics research.

Contribution

It demonstrates the potential of $0 u eta eta$ decay detection to provide insights into light right-handed neutrinos in the minimal seesaw framework.

Findings

Light right-handed neutrinos can significantly contribute to $0 u eta eta$ decay.

Future experiments could detect signals indicating the presence of such neutrinos.

Detection would have major implications for understanding neutrino mass origin.

Abstract

We consider the minimal seesaw model, the Standard Model extended by two right-handed neutrinos, for explaining the neutrino masses and mixing angles measured in oscillation experiments. When one of right-handed neutrinos is lighter than the electroweak scale, it can give a sizable contribution to neutrinoless double beta ($0\nu \beta \beta$) decay. We show that the detection of the $0 \nu \beta \beta$ decay by future experiments gives a significant implication to the search for such light right-handed neutrino.