Probing unitarity violation of lepton flavor mixing matrix with reactor antineutrinos at JUNO and TAO

Abstract

Motivated by the precise measurements of neutrino oscillation parameters at Jiangmen Underground Neutrino Observatory (JUNO), we investigate the possibility of probing the unitarity violation of lepton flavor mixing matrix solely with reactor antineutrinos. First, we stress that it is necessary to reconsider the production and detection of neutrinos in a self-consistent way, apart from neutrino propagation, when analyzing experimental sensitivities to unitarity violation. Then, concentrating on JUNO and its satellite experiment Taishan Antineutrino Observatory (TAO), we demonstrate how the event rates of inverse beta decays (i.e., ${\overline{\nu }}_e^{}+p\to e^{+}+n$) for observing ${\overline{\nu }}_e^{}\to {\overline{\nu }}_e^{}$ oscillations, and those of elastic antineutrino-electron scattering (i.e., ${\overline{\nu }}_{\alpha }^{}+e^{-}\to {\overline{\nu }}_{\alpha }^{}+e^{-}$ with $\alpha =e,\mu ,\tau$) for ${\overline{\nu }}_e^{}\to {\overline{\nu }}_{\mu }^{}$ and ${\overline{\nu }}_e^{}\to {\overline{\nu }}_{\tau }^{}$ oscillations, depend on the parameters characterizing unitarity violation. Our investigation will be useful for JUNO and TAO to place independent constraints with more data in the near future.

21 pages, 1 figure, more discussions and references added, version accepted by PLB

References in corpus (17)

• Observation of electron-antineutrino disappearance at Daya Bay
• NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
• Unitarity of the Leptonic Mixing Matrix
• CP-violation from non-unitary leptonic mixing
• Non-unitary neutrino mixing and CP violation in the minimal inverse seesaw model
• Correlation between the Charged Current Interactions of Light and Heavy Majorana Neutrinos
• Probing non-unitary mixing and CP-violation at a Neutrino Factory
• Implications of Leptonic Unitarity Violation at Neutrino Telescopes
• Complete One-loop Matching of the Type-I Seesaw Model onto the Standard Model Effective Field Theory
• An accurate evaluation of electron (anti-)neutrino scattering on nucleons
• Non-unitary deviation from the tri-bimaximal lepton mixing and its implications on neutrino oscillations
• Low-energy limits on heavy Majorana neutrino masses from the neutrinoless double-beta decay and non-unitary neutrino mixing
• Non-unitary Leptonic Flavor Mixing and CP Violation in Neutrino-antineutrino Oscillations
• Radiative Decays of Charged Leptons in the Seesaw Effective Field Theory with One-loop Matching
• Neutrino Flavor States and the Quantum Theory of Neutrino Oscillations
• Elastic Neutrino-electron Scattering at the One-loop Level in the Standard Model
• CP violation in light neutrino oscillations and heavy neutrino decays: a general and explicit seesaw-bridged correlation

Cited by in corpus (3)

• Viability of $A_4$, $S_4$ and $A_5$ Flavour Symmetries in Light of the First JUNO Result
• Fate of ${\theta }_{12}$ under $\mu -\tau$ Reflection Symmetry in Light of the First JUNO Results
• Testing lepton non-unitarity with the next generation of Germanium-based CE$\nu$NS reactor experiments