Use of neutrino scattering events with low hadronic recoil to inform neutrino flux and detector energy scale
Use of neutrino scattering events with low hadronic recoil to inform neutrino flux and detector energy scale
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DOI：
10.1088/1748-0221/16/08/p08068
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发表时间：
2021-08-01
影响因子：
1.3
通讯作者：
Zazueta, L.
中科院分区：
文献类型：
--
作者：
Bashyal, A.;Rimal, D.;Zazueta, L.
具有低强子反冲（“低v”）的带电中微子相互作用的横截面与中微子能量的关系近似恒定。这些相互作用已被用于测量中微子通量的形状作为中微子能量的函数在基于加速器的中微子实验，如CCFR，NuTeV，MINOS和MINERvA。在本文中，我们证明了低v事件可以用来测量中微子通量和探测器模型的参数，并利用上游探测器面的事件分布可以区分影响中微子通量模型的参数。通过将MINERvA暴露于NuMI中等能量束获得的低v事件的大样本拟合，我们发现最佳拟合通量参数在其先验不确定性范围内，但MINOS探测器中重建的μ子的能量尺度偏移了3.6%（或该参数先验不确定性的1.8倍）。这些拟合结果现在用于所有MINERvA横截面测量，并且该技术可以应用于在MINERvA能量下操作的其他实验，例如DUNE。
Charged-current neutrino interactions with low hadronic recoil ("low-v") have a cross-section that is approximately constant versus neutrino energy. These interactions have been used to measure the shape of neutrino fluxes as a function of neutrino energy at accelerator-based neutrino experiments such as CCFR, NuTeV, MINOS and MINERvA. In this paper, we demonstrate that low-v events can be used to measure parameters of neutrino flux and detector models and that utilization of event distributions over the upstream detector face can discriminate among parameters that affect the neutrino flux model. From fitting a large sample of low-v events obtained by exposing MINERvA to the NuMI medium-energy beam, we find that the best-fit flux parameters are within their a priori uncertainties, but the energy scale of muons reconstructed in the MINOS detector is shifted by 3.6% (or 1.8 times the a priori uncertainty on that parameter). These fit results are now used in all MINERvA cross-section measurements, and this technique can be applied by other experiments operating at MINERvA energies, such as DUNE.