2020/03/31 by COHERENT Collaboration, D. Akimov, J. B. Albert +80 · 1 citation
Physics and Astronomy · #nucl-ex #hep-ex
paper · pdf · doi:10.1103/physrevlett.126.012002
published as Phys. Rev. Lett. 126, 012002 (2021) · 8 pages, 5 figures with 2 pages, 6 figures supplementary material V3: fixes to figs 3,4 V4: fix typo in table 1, V5: replaced missing appendix, V6: fix Eq 1, new fig 3, V7 final version, updated with final revisions
arxiv created 2021/02/15 · arxiv updated 2021/02/17
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 3σ significance. The measured cross section, averaged over the incident neutrino flux, is (2.2 ± 0.7) ×10-39 cm2 -- 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.