Measurement of coherent elastic neutrino nucleus scattering on germanium by COHERENT
M. Adhikari, M. Ahn, D. Amaya Matamoros, P.S. Barbeau, V. Belov, I. Bernardi, C. Bock, A. Bolozdynya, R. Bouabid, A. Bracho, J. Browning, B. Cabrera-Palmer, N. Cedarblade-Jones, S. Chen, A.I. Col\'on Rivera, V. da Silva, Y. Efremenko, S.R. Elliott, A. Erlandson, L. Fabris

TL;DR
This paper presents the most precise measurement of coherent elastic neutrino-nucleus scattering using a germanium detector, providing important data for testing the Standard Model and probing new physics.
Contribution
The study provides the first high-precision measurement of the neutrino-nucleus scattering cross section with germanium, enhancing constraints on non-standard neutrino interactions.
Findings
Measured cross section of 1.00 ± 0.10 (stat) ± 0.10 (sys) in units of 10^{-39} cm^2.
Observed 124 counts with a cumulative exposure of 4.68×10^{22} protons on target.
Improved limits on non-standard neutrino interactions mediated by heavy particles.
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 protons on target yielded a total number of observed counts of and a flux-averaged cross section of relative to the standard-model expectation of . 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.
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Taxonomy
TopicsNeutrino Physics Research · Dark Matter and Cosmic Phenomena · Radioactive Decay and Measurement Techniques
