COHERENT · 2021

First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

Phys.Rev.Lett. 126 012002 · 10.1103/PhysRevLett.126.012002

arXiv:2003.10630 Journal INSPIRE All papers

Measurements

Current	Flavor	Target	Topology	Type	Observables	Energy
NC	νμ, ν̄μ, νe	Ar	CEvNS	total	first CEvNS on argon (CENNS-10)	stopped-pion (SNS)

Abstract

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.

Citation

@article{COHERENT:2020iec,
  collaboration = "COHERENT",
  title = "{First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon}",
  eprint = "2003.10630",
  doi = "10.1103/PhysRevLett.126.012002",
  journal = "Phys.Rev.Lett.",
  volume = "126",
  pages = "012002",
  year = "2021",
}