Measurement of neutrino-nucleus interactions with the upgraded ND280 detector at T2K

在 T2K 使用升级版 ND280 探测器测量中微子与原子核的相互作用

• 批准号: 2751110
• 金额: --
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2751110
• 关键词: Measurement; neutrino; nucleus; interactions; upgraded

Tokai-to-Kamioka, T2K, is a long baseline experiment with the primary goal of investigating neutrino oscillations. This experiment uses a muon neutrino (or antineutrino) beam, produced at the J-PARC facility, targeting Super-Kamiokande (Super-K) which is positioned 295 km downstream of the beam at an off-axis angle of 2.5 degrees. The experiment also uses the ND280 off-axis near detector and by working in conjunction with the far detector, Super-K, measurements of the electron and muon neutrinos present in the beam before and after oscillation can be taken.The ND280 near detector has the primary goal of measuring, and constraining, the neutrino flux and measuring the interaction cross sections. These measurements are used to estimate the varieties of neutrino interactions that would be observed at Super-K, reducing the systematic uncertainty in the measurements. Classification of the different events relies on the use of an accurate particle identification (PID), utilising the data collected by the ND280 sub-detectors to correctly identify each event. The dominant systematic uncertainty in the oscillation analysis is the cross-section uncertainty. However, the ND280 near detector is currently undergoing a major upgrade, removing one of the old detectors and installing all new sub-detectors in its place. These new detectors should significantly improve the performance and sensitivity of ND280. The new data that will be recorded by the upgraded ND280 near detector can then be exploited as to create an improved PID to improve event classification and reduce the systematic uncertainties of the measurements. The improved PID of the upgraded ND280 will be used to take measurements of the neutrino cross-section.

东海到神冈（T2K）是一项长基线实验，其主要目标是研究中微子振荡。该实验使用 J-PARC 设施产生的 μ 子中微子（或反中微子）束，目标是位于束流下游 295 公里处、离轴角 2.5 度的超级神冈 (Super-K)。该实验还使用ND280离轴近探测器，通过与远探测器Super-K配合工作，可以测量振荡前后束流中存在的电子和μ子中微子。ND280近探测器具有主要目标是测量和约束中微子通量并测量相互作用截面。这些测量用于估计在 Super-K 中观察到的中微子相互作用的种类，从而减少测量中的系统不确定性。不同事件的分类依赖于精确粒子识别 (PID) 的使用，利用 ND280 子探测器收集的数据来正确识别每个事件。振荡分析中主要的系统不确定性是横截面不确定性。然而，ND280 近距探测器目前正在进行重大升级，拆除其中一个旧探测器并安装所有新的子探测器。这些新探测器将显着提高 ND280 的性能和灵敏度。然后，可以利用升级后的 ND280 近探测器记录的新数据来创建改进的 PID，以改进事件分类并减少测量的系统不确定性。升级后的 ND280 的改进 PID 将用于测量中微子截面。