论文标题
通过后重建后拟合测量液体氩中的中微子事件时间
Measuring the Neutrino Event Time in Liquid Argon by a Post-Reconstruction One-parameter Fit
论文作者
论文摘要
我们提出了一种相对简单的方法，可以在基于液体氩（LAR）基于TPC的中微子检测器中测量事件时间，该检测器在执行单参数拟合之前，利用TPC数据中每个事件的拓扑重建。测得的光子的测量时间和位置适合使用电子漂移重建的轨道的预期光模式。该事件可以将其视为仅中微子相互作用时间作为自由参数的刚体。 LAR的光学特性与可见波长中Cherenkov光的水的光学特性相当。鉴于电子漂移的已知轨道拓扑，可以对光模式进行数据比较，从而实现光学模型的原位校准，并进一步优化时间安排。一个底线计算预测，相互作用时间的单个参数拟合需要的光电探测器覆盖率明显低于常规暖液检测器中相同精度所需的光电探测器覆盖率。
We propose a relatively simple method to measure the event time in liquid Argon (LAr) TPC-based neutrino detectors that takes advantage of the topological reconstruction of each event from the TPC data prior to performing a one-parameter fit. Measured times and positions of detected photons are fit to the expected pattern of light from the tracks as reconstructed using the electron drift. The event can be treated as a rigid body with only the neutrino interaction time as a free parameter. The optical properties of LAr are comparable to those of water for Cherenkov light in visible wavelengths. Data-Monte Carlo comparisons of the light patterns, given the known track topology from electron drift, enable in situ calibration of the optical model and further optimization of the timing. A back-of-the-envelope calculation predicts that the single parameter fit for the interaction time requires a significantly lower photodetector coverage than needed for the same precision in conventional warm-liquid detectors.
