First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon
First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon
复制标题
DOI：
10.1103/physrevlett.126.012002
复制
发表时间：
2021-01-07
影响因子：
8.6
通讯作者：
Zettlemoyer, J.
中科院分区：
文献类型：
--
作者：
Akimov, D.;Albert, J. B.;Zettlemoyer, J.
本文报道了在橡树岭国家实验室的Sputron中子源上用液氩探测器首次测量到的氩的相干弹性中微子-核散射（CEvNS）。两个独立的分析倾向于CEvNS，而不是仅背景的零假设，具有大于3 sigma的显著性。测量的横截面，平均入射中微子通量，是（2.2 +/- 0.7）× 10（-39）cm（2）-与标准模型预测一致。这一结果的中子数依赖性，再加上我们以前对CsI的测量，证实了CEvNS过程的存在，并提供了改进的非标准中微子相互作用的约束。
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 +/- 0.7) x 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 nonstandard neutrino interactions.