Measurement of cosmic-ray reconstruction efficiencies in the MicroBooNE LArTPC using a small external cosmic-ray counter

Measurement of cosmic-ray reconstruction efficiencies in the MicroBooNE LArTPC using a small external cosmic-ray counter
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使用小型外部宇宙射线计数器测量 MicroBooNE LArTPC 中的宇宙射线重建效率

DOI:
10.1088/1748-0221/12/12/p12030
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发表时间:
2017
影响因子:
1.3
通讯作者:
Acciarri R
Acciarri R
中科院分区:
工程技术4区
文献类型:
--
作者:
Acciarri R

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MicroBooNE探测器是费米实验室的液态氩时间投影室,用于研究短基线中微子振荡和中微子-氩相互作用截面。由于其位置靠近表面,很好地理解宇宙μ子作为背景源对实验至关重要。我们提出了一种在MicroBooNE中使用安装在主探测器上方的外部0.5m(L)× 0.5m(W)μ子计数器堆来确定宇宙线重建效率的方法。数据是通过放置在三个不同位置的外部μ子计数器堆栈获取的,对应于与探测器不同部分相交的宇宙射线。探测器中径迹的数据重建效率为100data =(97.1±0.1(stat)±1.4(sys))%,与MonteCarlo重建效率100 MC=(97.4±0.1)%一致。该分析代表了该方法的小规模演示,该方法可用于来自最近安装的宇宙射线标记系统的未来数据,该系统将能够标记通过MicroBooNE探测器的80%的宇宙射线。
The MicroBooNE detector is a liquid argon time projection chamber at Fermilab designed to study short-baseline neutrino oscillations and neutrino-argon interaction cross-section. Due to its location near the surface, a good understanding of cosmic muons as a source of backgrounds is of fundamental importance for the experiment. We present a method of using an external 0.5 m (L)× 0.5 m (W) muon counter stack, installed above the main detector, to determine the cosmic-ray reconstruction efficiency in MicroBooNE. Data are acquired with this external muon counter stack placed in three different positions, corresponding to cosmic rays intersecting different parts of the detector. The data reconstruction efficiency of tracks in the detector is found to be epsilon data=(97.1±0.1 (stat)±1.4 (sys))%, in good agreement with the Monte Carlo reconstruction efficiency epsilon MC=(97.4±0.1)%. This analysis represents a small-scale demonstration of the method that can be used with future data coming from a recently installed cosmic-ray tagger system, which will be able to tag≈ 80% of the cosmic rays passing through the MicroBooNE detector.
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