A Study of Neutrino Interactions in Argon Gas
A Study of Neutrino Interactions in Argon Gas
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氩气中微子相互作用的研究
DOI：
10.25560/26933
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发表时间：
2015
影响因子：
--
通讯作者：
P. Hamilton
中科院分区：
文献类型：
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作者：
P. Hamilton
T2K(东海至神冈)实验使用强烈的离轴Muon中微子束，通过Muon中微子消失和电子中微子出现来研究中微子振荡。随着T2K和其他中微子振荡实验超出了它们在统计上受到限制的范围，中微子-原子核截面上的不确定性作为这些实验和下一代探测器精度的限制因素变得越来越重要。减少这些不确定性需要通过实证研究更好地理解中微子-原子核相互作用。本论文描述了首次使用强T2K束流和三个气态Ar时间投影室在T2K近探测器ND280上测量了气态靶上的中微子-核相互作用。我确定了63个中微子相互作用候选者，并比较了数据和模拟软件包NEUT和GENIE之间的带电电流νμ微分截面与质子多重数的关系。本文还描述了选择气体相互作用数据样本的方法，通过ND280 TPC中提供的详细重建，提供了比本文所涵盖的更多的机会来检验核模型的预测。这项分析的未来几代预计将扩大样本规模和测试变量的范围。
The T2K (Tokai to Kamioka) experiment uses an intense off-axis muon neutrino beam to study neutrino oscillations through muon neutrino disappearance and electron neutrino appearance. As T2K and other neutrino oscillation experiments move beyond the regime in which they are statistically limited, uncertainties on neutrino-nucleus cross-sections have become increasingly significant as a limiting factor on the precision of these experiments, and on the next generation of detectors. Reducing these uncertainties requires a better understanding of neutrino-nucleus interactions through empirical study. This thesis describes the first ever measurement of neutrino-nucleus interactions on a gaseous target, using the intense T2K beam and the three gaseous argon time-projection chambers in the T2K near detector, ND280. I identify 63 neutrino interaction candidates, and make a comparison of the charged-current νμ differential cross-section with respect to proton multiplicity between data and the simulation packages NEUT and GENIE. This thesis also describes the methods developed to select the gas interactions data sample, which by virtue of the detailed reconstruction available in the ND280 TPCs offers further opportunities to test the predictions of nuclear models than those that are covered by this thesis. Future generations of this analysis are expected to expand both the size of the sample and the range of variables tested.