Department of Physics and Astronomy, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA.
Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
Phys Rev Lett. 2018 Jun 1;120(22):221805. doi: 10.1103/PhysRevLett.120.221805.
We report on multinucleon effects in low momentum transfer (<0.8 GeV/c) antineutrino interactions on plastic (CH) scintillator. These data are from the 2010-2011 antineutrino phase of the MINERvA experiment at Fermilab. The hadronic energy spectrum of this inclusive sample is well described when a screening effect at a low energy transfer and a two-nucleon knockout process are added to a relativistic Fermi gas model of quasielastic, Δ resonance, and higher resonance processes. In this analysis, model elements introduced to describe previously published neutrino results have quantitatively similar benefits for this antineutrino sample. We present the results as a double-differential cross section to accelerate the investigation of alternate models for antineutrino scattering off nuclei.
我们报告了在费米实验室 MINERvA 实验的 2010-2011 反中微子阶段中，低动量转移（<0.8 GeV/c）反中微子与塑料（CH）闪烁体相互作用中的多核子效应。当在低能量转移处引入屏蔽效应和两个核子敲出过程，并将其添加到准弹性、Δ共振和更高共振过程的相对论费米气体模型中时，这个包含样本的强子能量谱得到了很好的描述。在这个分析中，为描述之前发表的中微子结果而引入的模型元素，对于这个反中微子样本具有定量上相似的好处。我们以双微分截面的形式呈现结果，以加速对核反中微子散射的替代模型的研究。
