首次对氩进行相干弹性中微子-原子核散射测量。

First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon.

作者信息

Akimov D, Albert J B, An P, Awe C, Barbeau P S, Becker B, Belov V, Bernardi I, Blackston M A, Blokland L, Bolozdynya A, Cabrera-Palmer B, Chen N, Chernyak D, Conley E, Cooper R L, Daughhetee J, Del Valle Coello M, Detwiler J A, Durand M R, Efremenko Y, Elliott S R, Fabris L, Febbraro M, Fox W, Galindo-Uribarri A, Gallo Rosso A, Green M P, Hansen K S, Heath M R, Hedges S, Hughes M, Johnson T, Kaemingk M, Kaufman L J, Khromov A, Konovalov A, Kozlova E, Kumpan A, Li L, Librande J T, Link J M, Liu J, Mann K, Markoff D M, McGoldrick O, Moreno H, Mueller P E, Newby J, Parno D S, Penttila S, Pershey D, Radford D, Rapp R, Ray H, Raybern J, Razuvaeva O, Reyna D, Rich G C, Rudik D, Runge J, Salvat D J, Scholberg K, Shakirov A, Simakov G, Sinev G, Snow W M, Sosnovtsev V, Suh B, Tayloe R, Tellez-Giron-Flores K, Thornton R T, Tolstukhin I, Vanderwerp J, Varner R L, Virtue C J, Visser G, Wiseman C, Wongjirad T, Yang J, Yen Y-R, Yoo J, Yu C-H, Zettlemoyer J

机构信息

Institute for Theoretical and Experimental Physics named by A. I. Alikhanov of National Research Centre "Kurchatov Institute," Moscow, 117218, Russian Federation.

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409, Russian Federation.

出版信息

Phys Rev Lett. 2021 Jan 8;126(1):012002. doi: 10.1103/PhysRevLett.126.012002.

DOI:10.1103/PhysRevLett.126.012002

PMID:33480779

Abstract

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 3σ significance. The measured cross section, averaged over the incident neutrino flux, is (2.2±0.7)×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.

摘要

我们报告了在橡树岭国家实验室散裂中子源使用液氩探测器对氩进行相干弹性中微子-原子核散射（CEvNS）的首次测量。两项独立分析表明，CEvNS比仅基于背景的零假设更受青睐，显著性大于3σ。在入射中微子通量上平均得到的测量截面为(2.2±0.7)×10^{-39} 平方厘米，与标准模型预测一致。该结果的中子数依赖性，连同我们之前对碘化铯测量的结果，证实了CEvNS过程的存在，并对非标准中微子相互作用提供了更好的限制。