Adamski S, Ahn M, Barbeau P S, Belov V, Bernardi I, Bock C, Bolozdynya A, Bouabid R, Browning J, Cabrera-Palmer B, Cedarblade-Jones N, Colón Rivera A I, Conley E, da Silva V, Daughhetee J, Detwiler J, Ding K, Durand M R, Efremenko Y, Elliott S R, Erlandson A, Fabris L, Galindo-Uribarri A, Green M P, Hakenmüller J, Heath M R, Hedges S, Jeong H, Johnson B A, Johnson T, Jones H, Khromov A, Kim D, Konovalov A, Kozlova E, Kumpan A, Kyzylova O, Lee Y, Li G, Li L, Link J M, Liu J, Luxnat M, Major A, Mann K, Markoff D M, Mattingly J, Moye J, Mueller P E, Newby J, Ogoi N, O'Reilly J, Parno D S, Pérez-Loureiro D, Pershey D, Prior C G, Queen J, Rapp R, Ray H, Razuvaeva O, Reyna D, Rich G C, Rudik D, Runge J, Salvat D J, Sander J, Scholberg K, Shakirov A, Simakov G, Snow W M, Sosnovtsev V, Stringer M, Subedi T, Suh B, Sur B, Tayloe R, Tellez-Giron-Flores K, Tsai Y-T, van Nieuwenhuizen E E, Virtue C J, Visser G, Walkup K, Ward E M, Wongjirad T, Yang Y, Yoo J, Yu C-H, Zaalishvili A
Washington & Jefferson College, Washington, Pennsylvania 15301, USA.
Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea.
Phys Rev Lett. 2025 Jun 13;134(23):231801. doi: 10.1103/PhysRevLett.134.231801.
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 an on-beam excess of 20.6_{-6.3}^{+7.1} counts with a total exposure of 10.22 GWhkg, and we reject the no-CEvNS hypothesis with 3.9σ significance. The result agrees with the predicted standard model of particle physics signal rate within 2σ.
我们报告了在橡树岭国家实验室的散裂中子源上首次对天然锗进行的相干弹性中微子 - 原子核散射（CEvNS）探测。COHERENT合作组的锗微型探测器采用了大质量、低噪声、高纯度的锗谱仪，具有出色的能量分辨率，分析阈值为1.5 keV电子等效电离能。在总曝光量为10.22 GWhkg的情况下，我们观察到束流开启时过量计数为20.6_{-6.3}^{+7.1}，并且在3.9σ的显著性水平下排除了无CEvNS的假设。该结果与粒子物理标准模型预测的信号率在2σ范围内相符。
