利用T2K实验中碳和氧上的运动学不平衡可观测量对无π介子带电流μ子中微子相互作用进行首次双微分测量
First double-differential measurement of pionless charged-current muon neutrino interactions using kinematic imbalance observables on carbon and oxygen with the T2K experiment
AI总结：
该研究利用T2K实验首次对无π介子带电流μ子中微子相互作用进行双微分测量，同时提取碳和氧靶截面，与中微子事件发生器预测比较，发现无模型能全描述数据，突出中微子-核相互作用建模改进方向。
AI中文摘要：
我们报告了首次使用T2K ND280探测器测量μ子中微子带电流截面，该截面是关于氧上运动学不平衡（KI）可观测量的函数，末态无π介子且至少有一个质子。同时提取了碳和氧靶的截面，并作为几个KI可观测量的函数进行双微分，为核效应建模提供了新见解。这种联合测量对两个靶之间的相关性有直接敏感性，是减少采用多个靶核的中微子振荡实验系统不确定性的关键因素。与广泛使用的中微子事件发生器的预测比较表明，没有一个模型能完全描述测量相空间所有区域的数据。这些结果突出了当前和未来中微子振荡实验在中微子-核相互作用建模方面可能需要改进的方向。
英文摘要：
We report the first measurement of muon-neutrino charged-current cross section as a function of kinematic imbalance (KI) observables on oxygen with no pions and at least one proton in the final state, using the T2K ND280 detector. The cross section is extracted simultaneously for carbon and oxygen targets and double-differentially as a function of several KI observables, providing new insight into the modeling of nuclear effects. This joint measurement offers direct sensitivity to the correlations between two targets, a key ingredient for reducing systematic uncertainties in neutrino oscillation experiments that employ multiple target nuclei, such as T2K and Hyper-Kamiokande. Comparisons with predictions from widely used neutrino event generators show that none of the models fully describe the data across all regions of measured phase space. These results highlight possible directions where improvements in neutrino-nucleus interaction modeling are needed for current and future neutrino oscillation experiments.
