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arxiv 2003.10630 v7 pith:CF3LF47T submitted 2020-03-24 nucl-ex hep-ex

First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

classification nucl-ex hep-ex
keywords argoncevnsmeasurementcoherentelasticfirstneutrinoneutrino-nucleus
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report the first measurement of coherent elastic neutrino-nucleus scattering (\cevns) on argon using a liquid argon detector at the Oak Ridge National Laboratory Spallation Neutron Source. Two independent analyses prefer \cevns over the background-only null hypothesis with greater than $3\sigma$ significance. The measured cross section, averaged over the incident neutrino flux, is (2.2 $\pm$ 0.7) $\times$10$^{-39}$ cm$^2$ -- consistent with the standard model prediction. The neutron-number dependence of this result, together with that from our previous measurement on CsI, confirms the existence of the \cevns process and provides improved constraints on non-standard neutrino interactions.

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Cited by 8 Pith papers

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