用高压TPC定量测定氩气中的多核子效应
Quantifying multinucleon effect in Argon using high-pressure TPC
摘要：
中微子振荡实验使用重核靶来获得足够的相互作用率。通过使用这些目标，核效应被引入实验环境中，并且需要被量化，因为它们增加了系统误差。在低能区（约1 GeV），多核子事件也存在准弹性（QE）和Delta相互作用。因此，如果这些多核子事件没有被正确地纳入数据集，我们最终会得到不准确的中微子能量重建。在我们的工作中，我们已经说明了纳入多核子事件的重要性，减少系统误差的物理预测的沙丘近探测器（ND）。为了实现这一点，我们提出了事件分配比的Ar/C，Ar/Ar，和C/C作为平方四动量转移的函数，采用不同的核模型。该分析建议在事件样本中加入2 p2 h或多核子事件，并推广具有随机相位近似（RPA）效应的模型用于事件样本的分析，以克服或减少系统的不确定性。
英文摘要：
Neutrino oscillation experiments use heavy nuclear targets to achieve sufficient interaction rates. Nuclear effects are introduced in the experimental environment by the use of these targets and need to be quantified as they add to the systematic errors. In the low energy region(around 1 GeV) multinucleon events are also present along with Quasi Elastic(QE) and Delta interactions. Therefore if these multinucleon events are not incorporated in the data set properly, we end up with an inaccurate reconstruction of neutrino energy. In our work, we have illustrated the importance of incorporation of multinucleon events for the reduction of systematic errors in physics predictions by DUNE-Near Detector(ND). To achieve this we have presented the event distribution ratio of Ar/C, Ar/Ar, and C/C as a function of squared four-momentum transfer by employing different nuclear models. This analysis recommends the addition of 2p2h or multinucleon events in the event sample and promotes model with Random Phase Approximations(RPA) effect for the analysis of the event sample to overcome or reduce the systematic uncertainties.
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