88 research outputs found
Measurement of Coherent Elastic Neutrino-Nucleus Scattering from reactor antineutrinos
The 96.4 day exposure of a 3 kg ultra-low noise germanium detector to the
high flux of antineutrinos from a power nuclear reactor is described. A very
strong preference () for the presence of a coherent elastic
neutrino-nucleus scattering (CENS) component in the data is found, when
compared to a background-only model. No such effect is visible in 25 days of
operation during reactor outages. The best-fit CENS signal is in good
agreement with expectations based on a recent characterization of germanium
response to sub-keV nuclear recoils. Deviations of order 60\% from the Standard
Model CENS prediction can be excluded using present data. Standing
uncertainties in models of germanium quenching factor, neutrino energy
spectrum, and background are examined.Comment: 6 pages, 5 figures. Data release and additional information in
ancillary file
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