Evidence of Coherent Elastic Neutrino-Nucleus Scattering with COHERENT's Germanium Array
High Energy Physics - Experiment
2025-12-25 v2
Abstract
We report the first detection of coherent elastic neutrino-nucleus scattering (CEvNS) on natural germanium, measured at the Spallation Neutron Source at Oak Ridge National Laboratory. The Ge-Mini detector of the COHERENT collaboration employs large-mass, low-noise, high-purity germanium spectrometers, enabling excellent energy resolution, and an analysis threshold of 1.5 keV electron-equivalent ionization energy. We observe a on-beam excess of 20.6 +7.1 -6.3 counts with a total exposure of 10.22 GWhkg and we reject the no-CEvNS hypothesis with 3.9 sigma significance. The result agrees with the predicted standard model of particle physics signal rate within 2 sigma.
Keywords
Cite
@article{arxiv.2406.13806,
title = {Evidence of Coherent Elastic Neutrino-Nucleus Scattering with COHERENT's Germanium Array},
author = {S. Adamski and M. Ahn and P. S. Barbeau and V. Belov and I. Bernardi and C. Bock and A. Bolozdynya and R. Bouabid and J. Browning and B. Cabrera-Palmer and N. Cedarblade-Jones and A. I. Colón Rivera and E. Conley and V. da Silva and J. Daughhetee and J. Detwiler and K. Ding and M. R. Durand and Y. Efremenko and S. R. Elliott and A. Erlandson and L. Fabris and A. Galindo-Uribarri and M. P. Green and J. Hakenmüller and M. R. Heath and S. Hedges and H. Jeong and B. A. Johnson and T. Johnson and H. Jones and A. Khromov and D. Kim and A. Konovalov and E. Kozlova and A. Kumpan and O. Kyzylova and Y. Lee and G. Li and L. Li and J. M. Link and J. Liu and M. Luxnat and A. Major and K. Mann and D. M. Markoff and J. Mattingly and J. Moye and P. E. Mueller and J. Newby and N. Ogoi and J. O'Reilly and D. S. Parno and D. Pérez-Loureiro and D. Pershey and C. G. Prior and J. Queen and R. Rapp and H. Ray and O. Razuvaeva and D. Reyna and G. C. Rich and D. Rudik and J. Runge and D. J. Salvat and J. Sander and K. Scholberg and A. Shakirov and G. Simakov and W. M. Snow and V. Sosnovtsev and M. Stringer and T. Subedi and B. Suh and B. Sur and R. Tayloe and K. Tellez-Giron-Flores and Y. -T. Tsai and E. E. van Nieuwenhuizen and C. J. Virtue and G. Visser and K. Walkup and E. M. Ward and T. Wongjirad and Y. Yang and J. Yoo and C. -H. Yu and A. Zaalishvili},
journal= {arXiv preprint arXiv:2406.13806},
year = {2025}
}
Comments
7 pages, 6 figures