A COHERENT enlightenment of the neutrino Dark Side

Abstract

In the presence of non-standard neutrino interactions (NSI), oscillation data are affected by a degeneracy which allows the solar mixing angle to be in the second octant (aka the dark side) and implies a sign flip of the atmospheric mass-squared difference. This leads to an ambiguity in the determination of the ordering of neutrino masses, one of the main goals of the current and future experimental neutrino program. We show that the recent observation of coherent neutrino--nucleus scattering by the COHERENT experiment, in combination with global oscillation data, excludes the NSI degeneracy at the $3.1\sigma$ ($3.6\sigma$) CL for NSI with up (down) quarks.

5 pages, 3 figures

References in corpus (6)

• Observation of Coherent Elastic Neutrino-Nucleus Scattering
• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• Large gauge invariant non-standard neutrino interactions
• Shedding light on LMA-Dark solar neutrino solution by medium baseline reactor experiments: JUNO and RENO-50
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Cited by in corpus (15)

• COHERENT constraints on nonstandard neutrino interactions
• Impact of form factor uncertainties on interpretations of coherent elastic neutrino-nucleus scattering data
• Physics results from the first COHERENT observation of CE$\nu$NS in argon and their combination with cesium-iodide data
• Probing neutrino transition magnetic moments with coherent elastic neutrino-nucleus scattering
• The Future of Solar Neutrinos
• Flavor-dependent radiative corrections in coherent elastic neutrino-nucleus scattering
• Recent probes of standard and non-standard neutrino physics with nuclei
• Reactor neutrino oscillations as constraints on Effective Field Theory
• EFT at FASER$\nu$
• Determining the nuclear neutron distribution from Coherent Elastic neutrino-Nucleus Scattering: current results and future prospects
• Interplay between nonstandard and nuclear constraints in coherent elastic neutrino-nucleus scattering experiments
• Towards deconstructing the simplest seesaw mechanism
• Neutrino oscillations and Non-Standard Interactions
• Constraining Light Mediators via Detection of Coherent Elastic Solar Neutrino Nucleus Scattering
• Constraining nonstandard neutrino interactions at electron colliders