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arXiv 2108.01384physics.ins-detnucl-ex
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NeuLAND中事件重构的经典方法和机器学习方法

Classical and Machine Learning Methods for Event Reconstruction in NeuLAND

Jan Mayer, Konstanze Boretzky, Christiaan Douma, Elena Hoemann, Andreas Zilges

摘要:

新一代大面积中子探测器是用实验核物理研究宇宙物质起源的关键部件。它是德国反质子和离子研究设施的相对论放射性核束反应装置的核心部件。从这些反应中释放出的中子在NeuLAND中产生了各种各样的图案。从这些模式中,中子的数量(多重性)和它们的第一个相互作用点必须被重建,以确定中子的四动量。在本文中,我们详细介绍了这种重建所面临的挑战,并提出了一系列可能的解决方案。Scikit-Learn分类模型和简单的基于Keras的神经网络在广泛的输入缩放器组合上进行了训练,并与经典模型进行了比较。虽然多重性重建的改进由于特征之间的重叠而受到限制,但是机器学习方法实现了明显更好的第一交互点选择,这直接提高了物理量的分辨率。

英文摘要:

NeuLAND, the New Large Area Neutron Detector, is a key component to investigate the origin of matter in the universe with experimental nuclear physics. It is a core component of the Reactions with Relativistic Radioactive Beams setup at the Facility for Antiproton and Ion Research, Germany. Neutrons emitted from these reactions create a wide range of patterns in NeuLAND. From these patterns, the number of neutrons (multiplicity) and their first interaction points must be reconstructed to determine the neutrons' four-momenta. In this paper, we detail the challenges involved in this reconstruction and present a range of possible solutions. Scikit-Learn classification models and simple Keras-based neural networks were trained on a wide range of input-scaler combinations and compared to classical models. While the improvement in multiplicity reconstruction is limited due to the overlap between features, the machine learning methods achieve a significantly better first interaction point selection, which directly improves the resolution of physical quantities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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