First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

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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 +/- 0.7) x 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 nonstandard neutrino interactions.
Publisher
AMER PHYSICAL SOC
Issue Date
2021-01
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.126, no.1

ISSN
0031-9007
DOI
10.1103/PhysRevLett.126.012002
URI
http://hdl.handle.net/10203/280633
Appears in Collection
PH-Journal Papers(저널논문)
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