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Final CONUS results on coherent elastic neutrino-nucleus scattering at the Brokdorf reactor
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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.
Forward citations
Cited by 5 Pith papers
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Direct observation of coherent elastic antineutrino-nucleus scattering
CONUS+ reports the first 3.7 sigma observation of coherent elastic antineutrino-nucleus scattering at a nuclear reactor, with 395 measured events versus 347 predicted.
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Testing lepton non-unitarity with the next generation of Germanium-based CE$\nu$NS reactor experiments
A future 100-kg Germanium reactor CEνNS experiment could constrain lepton non-unitarity to 1−α11² ≈ 0.005 and, under low-scale seesaw assumptions, probe new-physics scales up to ~2.5 TeV.
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Reactor antineutrinos CE$\nu$NS on germanium: CONUS+ and TEXONO as a new gateway to SM and BSM physics
CONUS+ and TEXONO reactor CEνNS data are consistent with the Standard Model and yield the most stringent limit on the electron neutrino millicharge through neutrino-electron scattering.
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Probing conventional and new physics at the ESS with coherent elastic neutrino-nucleus scattering
Projected ESS CEνNS measurements would improve current constraints on the weak mixing angle, nuclear neutron radii, and several new physics scenarios by large factors, and would lead in some unexplored mass ranges.
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Exploring the Standard Model and Beyond from the Evidence of CE$\nu$NS with Reactor Antineutrinos in CONUS+
Fitting the CONUS+ reactor CEνNS event count yields sin²θW = 0.268 ± 0.047, µν < 5.6×10⁻¹⁰ µB, and NSI bounds similar to COHERENT, all consistent with the Standard Model.
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