在氩上的相干弹性中微子核散射的首次测量

论文标题

在氩上的相干弹性中微子核散射的首次测量

First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

论文作者

COHERENT Collaboration, Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Cooper, R. L., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, 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.

论文摘要

我们使用液体氩探测器在橡木岭国家实验室散布中子中子源中首次测量了相干弹性中微子核散射（\ cevns）。两项独立的分析比仅在$3σ$的意义大于$3σ$的假设中更喜欢\ cevns。在事件中微子通量上平均测得的横截面为（2.2 $ \ pm $ 0.7）$ \ times $ 10 $^{ - 39} $ cm $^2 $ - 与标准模型预测一致。该结果的中子依赖性以及我们先前对CSI的测量结果证实了\ CEVNS过程的存在，并对非标准中微子相互作用提供了改进的约束。

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 $3σ$ significance. The measured cross section, averaged over the incident neutrino flux, is (2.2 $\pm$ 0.7) $\times$10$^{-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 non-standard neutrino interactions.

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