Extracting Majorana Properties in the Throat of Neutrinoless Double Beta Decay

Understand

Assuming that neutrinos are Majorana particles, we explore what information can be inferred from future strong limits (i.e.

• non-observation) for neutrinoless double beta decay.
• Specifically we consider the case where the mass hierarchy is normal and the different contributions to the effective mass $\langle m \rangle_{ee}$ partly cancel.
• We discuss how this fixes the two Majorana CP phases simultaneously from the Majorana Triangle and how it limits the lightest neutrino mass $m_1$ within a narrow window.