论文标题
对INO的ICal检测器的Tau中微子事件的仿真研究
A simulation study of tau neutrino events at the ICAL detector in INO
论文作者
论文摘要
我们介绍了首次详细的模拟研究，该研究对拟议的印度基于印度的中微子天文台（INO）实验室中的大气中微子相互作用（ICAL）检测器中的大气中微子相互作用中中微子相互作用进行了首次详细的模拟研究。由于GEV能量的固有大气中微子通量仅包含电子中微子和抗中微子的tau中微子成分，因此仅包含电子中微子（和抗中微子），因此大气中微子的任何特征都是中微子振荡的信号。我们研究了通过这些CC相互作用产生的tau lept子，它们通过它们的耐药衰减研究。这些事件表现为超过中性电流（NC）背景的过度，其中黑龙是唯一可观察到的成分。我们发现，在大气中微子通量中存在tau中微子的存在，可以证明具有10年数据的近4σ$置信度；此外，这些事件对中微子振荡参数很敏感，$ \ sin^2θ_{23} $和$ \vertΔm__{31}^2 \ vert $（或$ \vertΔm__{32}^2}^2 \ vert $）最后，我们表明，将这些事件与标准MUON分析相结合，这是ICAL的核心目标进一步提高了可以测量这些参数，尤其是$θ_{23} $的八分之一的精度。
We present the first detailed simulation study of tau neutrino-induced charged current (CC) events from atmospheric neutrino interactions in the Iron Calorimeter (ICAL) detector at the proposed India-based Neutrino Observatory (INO) laboratory. Since the intrinsic atmospheric neutrino flux at few to 10s of GeV energy comprises only electron and muon neutrinos (and anti-neutrinos) with negligible tau neutrino component, any signature of atmospheric tau neutrinos is a signal for neutrino oscillations. We study the tau leptons produced through these CC interactions via their hadronic decay. These events appear as an excess over the neutral current (NC) background where hadrons are the only observable component. We find that the presence of tau neutrinos in the atmospheric neutrino flux can be demonstrated to nearly $4σ$ confidence with 10 years data; in addition, these events are sensitive to the neutrino oscillation parameters, $\sin^2θ_{23}$ and $\vert Δm_{31}^2 \vert$ (or $\vert Δm_{32}^2 \vert$), in the 2--3 sector. Finally, we show that combining these events with the standard muon analysis which is the core goal of ICAL further improves the precision with which these parameters, especially the octant of $θ_{23}$, can be measured.
