Final CONUS results on coherent elastic neutrino-nucleus scattering at the Brokdorf reactor

Abstract

The Conus experiment studies coherent elastic neutrino-nucleus scattering in four 1 kg germanium spectrometers. Low ionization energy thresholds of 210 eV were achieved. The detectors were operated inside an optimized shield at the Brokdorf nuclear power plant which provided a reactor antineutrino flux of up to 2.3$\cdot$10${}^{13}$\,cm${}^{-2}$s${}^{-1}$. In the final phase of data collection at this site, the constraints on the neutrino interaction rate were improved by an order of magnitude as compared to the previous Conus analysis. The new limit of less than 0.34 signal events kg${}^{-1}$\,d${}^{-1}$ is within a factor 2 of the rate predicted by the standard model. This constraint is discussed in the context of conflicting measurements and results from another reactor neutrino experiment using similar technology.

9 figures, 4 tables

References in corpus (16)

• Observation of Coherent Elastic Neutrino-Nucleus Scattering
• Updated Summation Model: An Improved Agreement with the Daya Bay Antineutrino Fluxes
• Constraints on elastic neutrino nucleus scattering in the fully coherent regime from the CONUS experiment
• Measurement of Coherent Elastic Neutrino-Nucleus Scattering from reactor antineutrinos
• Germanium response to sub-keV nuclear recoils: a multipronged experimental characterization
• Novel constraints on neutrino physics beyond the standard model from the CONUS experiment
• Direct measurement of the ionization quenching factor of nuclear recoils in germanium in the keV energy range
• Search for coherent elastic neutrino-nucleus scattering at a nuclear reactor with CONNIE 2019 data
• First results of the nuGeN experiment on coherent elastic neutrino-nucleus scattering
• First upper limits on neutrino electromagnetic properties from the CONUS experiment
• Antineutrino Energy Spectrum Unfolding Based on the Daya Bay Measurement and Its Applications
• First measurement of high-energy reactor antineutrinos at Daya Bay
• Fast neutron background characterization of the future Ricochet experiment at the ILL research nuclear reactor
• Full background decomposition of the CONUS experiment
• On the impact of the Migdal effect in reactor CE$\nu$NS experiments
• Pulse shape discrimination for the CONUS experiment in the keV and sub-keV regime

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• Probing conventional and new physics at the ESS with coherent elastic neutrino-nucleus scattering
• Detailed nuclear structure calculations for coherent elastic neutrino-nucleus scattering
• Testing the dark side of neutrino oscillations with the solar neutrino fog at Dark Matter experiments
• Particle background characterization and prediction for the NUCLEUS reactor CE$\nu$NS experiment
• Impact of Geant4's Electromagnetic Physics Constructors on Accuracy and Performance of Simulations for Rare Event Searches
• Testing lepton non-unitarity with the next generation of Germanium-based CE$\nu$NS reactor experiments