COHERENT · 2026

Measurement of coherent elastic neutrino nucleus scattering on germanium by COHERENT

Abstract

The COHERENT collaboration reports the most precise measurement of the coherent elastic neutrino-nucleus scattering cross section to date. This measurement was performed with COHERENT's germanium detector array, Ge-Mini, at the Spallation Neutron Source at Oak Ridge National Laboratory. A cumulative exposure of $4.68\times10^{22}$ protons on target yielded a total number of observed counts of $124^{+14}_{-12}$ and a flux-averaged cross section of $1.00 \pm 0.10 \mathrm{(statistical)} \pm 0.10 \mathrm{(systematic)}$ relative to the standard-model expectation of $5.9\times10^{-39} \mathrm{cm}^2$ . The well-understood energy and timing distributions of the neutrino source allow for independent measurements of muon- and electron-neutrino scattering rates. This information is used to improve constraints on non-standard neutrino interactions mediated by heavy particles.

Labels

\nu_e

\nu_\mu

\bar\nu_\mu

GeCEνNSTotal

Data release

Release from arXiv.

Citation

@article{COHERENT:2026yje,
    author = "Adhikari, M. and others",
    collaboration = "COHERENT",
    title = "{Measurement of coherent elastic neutrino nucleus scattering on germanium by COHERENT}",
    eprint = "2603.17951",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    month = "3",
    year = "2026"
}