Measurements of \bar{\nu_\mu} and \bar{\nu_\mu} + \nu_\mu charged-current cross-sections without detected pions nor protons on water and hydrocarbon at mean antineutrino energy of 0.86GeV
Measurements of \bar{\nu_\mu} and \bar{\nu_\mu} + \nu_\mu charged-current cross-sections without detected pions nor protons on water and hydrocarbon at mean antineutrino energy of 0.86GeV
复制标题
在平均反中微子能量为 0.86GeV 的情况下，在水和碳氢化合物上测量 ar{ u_mu} 和 ar{ u_mu} u_mu 带电电流横截面，未检测到介子或质子
DOI：
10.1093/ptep/ptab014
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Y.Oyama et al.
中科院分区：
文献类型：
--
作者：
K.Abe;T.Ishida;Y.Oyama et al.
东海-神冈（Tokai-to-Kamioka，T2 K）实验[1]是日本的一个长基线中微子振荡实验。使用在J-PARC加速器复合体产生的νμ或νμ束，在远探测器Super-Kamiokande（SK）上测量电子（反）中微子的出现和μ子（反）中微子的消失。T2 K的目标是精确测量中微子振荡参数，包括通过精确测量（反）中微子振荡来寻找轻子扇区中的CP破坏。在这些测量中，SK的中微子事件率受到在近探测器ND 280中测量的横截面和中微子通量的限制。ND 280包括两个细粒度探测器FGD 1和FGD 2 [2]，用作中微子相互作用的目标和跟踪设备。FGD 1相互作用靶由塑料闪烁体组成，FGD 2由水和塑料闪烁体靶组成，而SK是水靶探测器。由于近探测器和远探测器目标的差异，中微子-核相互作用模型的不确定性构成了T2 K振荡分析中系统不确定性的另一个来源。此外，人们对核效应知之甚少，如所谓的两粒子两空穴（2 p2 h）过程，具有很大的不确定性，这促使人们在多个中微子能量下测试相互作用模型。中微子相互作用模型被用来外推中微子事件分布从近探测器的测量到远探测器以及传出的粒子运动学。第一、
The Tokai-to-Kamioka (T2K) experiment [1] is a long-baseline neutrino oscillation experiment in Japan. Using either the νμ or the νμ beam produced at the J-PARC accelerator complex, both electron (anti-) neutrino appearance and muon (anti-) neutrino disappearance are measured at the far detector, Super-Kamiokande (SK). T2K aims to make precision measurements of neutrino oscillation parameters, including a search for CP violation in the leptonic sector by precisely measuring the (anti-) neutrino oscillation. In these measurements, the neutrino event rate at SK is constrained by the cross-section and neutrino flux measured in the near detector, ND280. The ND280 includes two fine-grained detectors, FGD1 and FGD2 [2], used as a target for neutrino interactions and as a tracking device. The FGD1 interaction target is made up of plastic scintillators, and FGD2 consists of water and plastic scintillator targets, while SK is a water-target detector. Uncertainties in the modeling of neutrino–nucleus interactions due to the difference in the target at the near and far detectors constitute an additional source of systematic uncertainties in the T2K oscillation analysis. In addition, poorly understood nuclear effects like the so-called two-particle–two-hole (2p2h) process with large uncertainties motivate testing the interaction model at multiple neutrino energies. The neutrino-interaction model is used to extrapolate the neutrino event distributions from the near-detector measurements to the far detector as well as outgoing particle kinematics. First,