Final CONUS results on coherent elastic neutrino nucleus scattering at the Brokdorf reactor
arxiv(2024)
摘要
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*10^13/(cm^2 s). In the final phase of data collection at this site, we
improved the constraints on the neutrino interaction rate as compared to the
previous CONUS analysis by an order of magnitude. The new limit of less than
0.34 signal events/(kg d) is within a factor 2 of the rate predicted by the
Standard Model.
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