Resolving the LMA-dark NSI degeneracy with coherent neutrino-nucleus scattering

Abstract

In the presence of non-standard neutrino interactions (NSI), a degeneracy exists in neutrino oscillation data, which involves the flipping of the octant of the mixing angle ${\theta }_{12}$ and the type of the neutrino mass ordering. In this article, we revisit the status of this degeneracy in the light of recent data on coherent elastic neutrino-nucleus scattering (CE$\nu$NS) from the COHERENT experiment. For general relative couplings to up and down quarks, the degeneracy is disfavoured at the $2\sigma$ level by the latest data but remains at a higher confidence level. We investigate the requirements of future CE$\nu$NS measurements to resolve the degeneracy with high significance. We find that a measurement involving both, electron and muon neutrino flavours and a target with a neutron-to-proton ratio close to 1 is required. For example, an experiment with a silicon target at the European Spallation Source can resolve the degeneracy at more than $4\sigma$ for arbitrary relative couplings to up and down quarks.

21 pages, 9 figures

References in corpus (12)

• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Observation of Coherent Elastic Neutrino-Nucleus Scattering
• COHERENT constraints on nonstandard neutrino interactions
• A COHERENT enlightenment of the neutrino Dark Side
• Constraints on elastic neutrino nucleus scattering in the fully coherent regime from the CONUS experiment
• Neutrinophilic Non-Standard Interactions
• Coherent Elastic Neutrino-Nucleus Scattering at the European Spallation Source
• Physics results from the first COHERENT observation of CE$\nu$NS in argon and their combination with cesium-iodide data
• Shedding light on LMA-Dark solar neutrino solution by medium baseline reactor experiments: JUNO and RENO-50
• Testing matter effects in propagation of atmospheric and long-baseline neutrinos
• Future CEvNS experiments as probes of lepton unitarity and light-sterile neutrinos
• Neutrino Oscillation Constraints on U(1)' Models: from Non-Standard Interactions to Long-Range Forces

Cited by in corpus (15)

• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• A Direct Detection View of the Neutrino NSI Landscape
• New reactor data improves robustness of neutrino mass ordering determination
• Solar neutrino physics
• Constraining Non-Standard Interactions with Coherent Elastic Neutrino-Nucleus Scattering at the European Spallation Source
• CP-Violating and Charged Current Neutrino Non-standard Interactions in CE$\nu$NS
• Probing light vector mediators with coherent scattering at future facilities
• Solar Neutrinos and the Strongest Oscillation Constraints on Scalar NSI
• Neutrino Non-standard Interactions with arbitrary couplings to u and d quarks
• Non-standard interactions from the future neutrino solar sector
• Testing New Physics in Oscillations at a Neutrino Factory
• Testing the dark side of neutrino oscillations with the solar neutrino fog at Dark Matter experiments
• Bounds on new physics with data of the Dresden-II reactor experiment and COHERENT
• Exploring nonstandard quark interactions through solar neutrino studies
• European Spallation Source: a future for Coherent Neutrino Nucleus Scattering