Extracting Majorana Properties in the Throat of Neutrinoless Double Beta Decay

Abstract

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 $⟨m{⟩}_{ee}$ 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. The two Majorana CP phases are in this case even better determined than in the usual case for larger $⟨m{⟩}_{ee}$. We show that the uncertainty in these predictions can be significantly reduced by the complementary measurement of reactor neutrino experiments, especially the medium baseline version JUNO/RENO-50. We also estimate the necessary precision on $⟨m{⟩}_{ee}$ to infer non-trivial Majorana CP phases and the upper limit $\langle m \rangle_{ee} \lesssim 1\,\mbox{meV}$ sets a target for the design of future neutrinoless double beta decay experiments.

21 pages, 10 figures

References in corpus (9)

• Observation of electron-antineutrino disappearance at Daya Bay
• Neutrino oscillations refitted
• The GERDA experiment for the search of 0νββ decay in ^{76}Ge
• Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO
• New expectations and uncertainties on neutrinoless double beta decay
• Properties of CP Violation in Neutrino-Antineutrino Oscillations
• Neutrinoless Double Beta Decay, the Inverted Hierarchy and Precision Determination of theta(12)
• Geometry of the effective Majorana neutrino mass in the neutrinoless double-beta decay
• Neutrino oscillations: brief history and present status

Cited by in corpus (13)

• Beyond-mean-field approaches for nuclear neutrinoless double beta decay in the standard mechanism
• Neutrino meets ultralight dark matter: $0\mathbf{\nu \beta \beta }$ decay and cosmology
• A Survey of Neutrino Flavor Models and the Neutrinoless Double Beta Decay Funnel
• Half-life Expectations for Neutrinoless Double Beta Decay in Standard and Non-Standard Scenarios
• Leptogenesis from the Asymmetric Texture
• Tribimaximal Mixing in the $SU(5)\times {\mathcal{T}}_{13}$ Texture
• Another look at the impact of an eV-mass sterile neutrino on the effective neutrino mass of neutrinoless double-beta decays
• Neutrinoless double beta decay in the minimal type-I seesaw model: How the enhancement or cancellation happens?
• Roles of sterile neutrinos in particle physics and cosmology
• Tentative sensitivity of future $0\nu \beta \beta$-decay experiments to neutrino masses and Majorana CP phases
• Inference of neutrino nature and Majorana CP phases from $0\nu \beta \beta$ decays with inverted mass ordering
• Majorana CP Violation Insights from Decaying Neutrinos
• RGE-induced $\mu$-$\tau$ symmetry breaking: an analysis of the latest T2K results