This paper reports the track multiplicity and kinematics of muons, charged pions, and protons from charged-current inclusive ${\nu }_{\mu }$ and ${\nu }_{\mu }$ interactions on a water target, measured using a nuclear emulsion detector in the NINJA experiment. A water target was exposed to the T2K antineutrino-enhanced beam corresponding to $7.1\times {10}^{20}$ protons on target with a mean energy of 1.3,GeV. Owing to the high-granularity of the nuclear emulsion, protons with momenta down to 200,MeV/$c$ from the neutrino-water interactions were detected. We find good agreement between the observed data and model predictions for all kinematic distributions other than the number of charged pions and the muon kinematics shapes. These results demonstrate the capability of measurements with nuclear emulsion to improve neutrino interaction models.

中文翻译：

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使用核乳剂检测器首次测量水中的μμ和νμ电荷电流包含性相互作用

本文报道了带电电流包括在内的μ子，带电介子和质子的轨迹多重性和运动学 ${\nu }_{\mu }$ 和 ${\nu }_{\mu }$在NINJA实验中使用核乳液检测仪测量的水目标上的相互作用。将水靶暴露于对应于T2K的T2K抗中微子增强束中$7.1\times {10}^{20}$质子在目标上的平均能量为1.3 GeV。由于核乳液的高颗粒性，质子的动量低至200，MeV /$C$从中微子与水的相互作用进行了检测。我们发现，除了带电介子的数量和介子运动学形状以外，所有运动学分布的观测数据与模型预测之间都具有良好的一致性。这些结果证明了用核乳剂进行测量以改善中微子相互作用模型的能力。