A COHERENT enlightenment of the neutrino Dark Side
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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.
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Cited by 3 Pith papers
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Phenomenological implications of the high-precision COHERENT germanium CE$\nu$NS data
High-precision COHERENT germanium CEνNS data yields state-of-the-art constraints on the weak mixing angle, neutrino charge radii, germanium neutron radius, and non-standard neutrino interactions via global analysis wi...
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Phenomenological implications of the high-precision COHERENT germanium CE$\nu$NS data
Analysis of new COHERENT germanium CEνNS data yields updated constraints on the weak mixing angle, neutrino charge radii, germanium neutron rms radius, and bounds on neutrino non-standard interactions via global fits.
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Coherent Elastic Neutrino-Nucleus Scattering at the Japan Proton Accelerator Research Complex
High-statistics CEνNS measurements at J-PARC are feasible with significant sensitivity to relevant particle physics scenarios using currently funded detectors.
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